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Posted to commits@orc.apache.org by om...@apache.org on 2015/06/22 23:07:25 UTC
[1/8] orc git commit: Publish first version of site.
Repository: orc
Updated Branches:
refs/heads/asf-site 9192d8816 -> ae9722a68
http://git-wip-us.apache.org/repos/asf/orc/blob/6a400548/fonts/fontawesome-webfont.woff
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http://git-wip-us.apache.org/repos/asf/orc/blob/6a400548/help/index.html
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+<!DOCTYPE HTML>
+<html lang="en-US">
+<head>
+ <meta charset="UTF-8">
+ <title>Getting Help</title>
+ <meta name="viewport" content="width=device-width,initial-scale=1">
+ <meta name="generator" content="Jekyll v2.4.0">
+ <link rel="stylesheet" href="//fonts.googleapis.com/css?family=Lato:300,300italic,400,400italic,700,700italic,900">
+ <link rel="stylesheet" href="/css/screen.css">
+ <link rel="icon" type="image/x-icon" href="/favicon.ico">
+ <!--[if lt IE 9]>
+ <script src="/js/html5shiv.min.js"></script>
+ <script src="/js/respond.min.js"></script>
+ <![endif]-->
+</head>
+
+
+<body class="wrap">
+ <header role="banner">
+ <nav class="mobile-nav show-on-mobiles">
+ <ul>
+ <li class="">
+ <a href="/">Home</a>
+ </li>
+ <li class="">
+ <a href="/docs/">Documentation</a>
+ </li>
+ <li class="">
+ <a href="/talks/">Talks</a>
+ </li>
+ <li class="">
+ <a href="/news/">News</a>
+ </li>
+ <li class="current">
+ <a href="/help/">Help</a>
+ </li>
+ <li class="">
+ <a href="/develop/">Develop</a>
+ </li>
+</ul>
+
+ </nav>
+ <div class="grid">
+ <div class="unit one-third center-on-mobiles">
+ <h1>
+ <a href="/">
+ <span class="sr-only">Apache ORC</span>
+ <img src="/img/logo.png" width="249" height="115" alt="ORC Logo">
+ </a>
+ </h1>
+ </div>
+ <nav class="main-nav unit two-thirds hide-on-mobiles">
+ <ul>
+ <li class="">
+ <a href="/">Home</a>
+ </li>
+ <li class="">
+ <a href="/docs/">Documentation</a>
+ </li>
+ <li class="">
+ <a href="/talks/">Talks</a>
+ </li>
+ <li class="">
+ <a href="/news/">News</a>
+ </li>
+ <li class="current">
+ <a href="/help/">Help</a>
+ </li>
+ <li class="">
+ <a href="/develop/">Develop</a>
+ </li>
+</ul>
+
+ </nav>
+ </div>
+</header>
+
+
+ <section class="standalone">
+ <div class="grid">
+
+ <div class="unit whole">
+ <article>
+ <h1>Getting Help</h1>
+ <p>Need help with ORC? Try these resources.</p>
+
+<h2 id="mailing-lists">Mailing Lists</h2>
+
+<p>The best option is to send email to the user list
+<a href="mailto:user@orc.apache.org">user@orc.apache.org</a>, which is for user
+discussions. All of the historic traffic is available in the
+<a href="http://mail-archives.apache.org/mod_mbox/orc-user/">archive</a>. To
+subscribe to the user list, please send email to
+<a href="mailto:user-subscribe@orc.apache.org">user-subscribe@orc.apache.org</a>.</p>
+
+<h2 id="bug-reports">Bug Reports</h2>
+
+<p>Please file any issues you encounter or fixes you’d like on the
+<a href="https://issues.apache.org/jira/browse/orc">ORC Jira</a>. We welcome
+patches!</p>
+
+<h2 id="stackoverflow">StackOverflow</h2>
+
+<p><a href="http://stackoverflow.com">StackOverflow</a> is a wonderful resource for
+any developer. Take a look over there to see if someone has answered
+your question.</p>
+
+<h2 id="browse-the-code">Browse the code</h2>
+
+<p>One of the advantages of open source software is that you can browse the code.
+The code is available on <a href="https://github.com/apache/orc/tree/master">github</a>.</p>
+
+ </article>
+ </div>
+
+ <div class="clear"></div>
+
+ </div>
+</section>
+
+
+ <footer role="contentinfo">
+ <p>The contents of this website are © 2015
+ <a href="https://www.apache.org/">Apache Software Foundation</a>
+ under the terms of the <a
+ href="https://www.apache.org/licenses/LICENSE-2.0.html">
+ Apache License v2</a>. Apache ORC and its logo are trademarks
+ of the Apache Software Foundation.</p>
+</footer>
+
+ <script>
+ var anchorForId = function (id) {
+ var anchor = document.createElement("a");
+ anchor.className = "header-link";
+ anchor.href = "#" + id;
+ anchor.innerHTML = "<span class=\"sr-only\">Permalink</span><i class=\"fa fa-link\"></i>";
+ anchor.title = "Permalink";
+ return anchor;
+ };
+
+ var linkifyAnchors = function (level, containingElement) {
+ var headers = containingElement.getElementsByTagName("h" + level);
+ for (var h = 0; h < headers.length; h++) {
+ var header = headers[h];
+
+ if (typeof header.id !== "undefined" && header.id !== "") {
+ header.appendChild(anchorForId(header.id));
+ }
+ }
+ };
+
+ document.onreadystatechange = function () {
+ if (this.readyState === "complete") {
+ var contentBlock = document.getElementsByClassName("docs")[0] || document.getElementsByClassName("news")[0];
+ if (!contentBlock) {
+ return;
+ }
+ for (var level = 1; level <= 6; level++) {
+ linkifyAnchors(level, contentBlock);
+ }
+ }
+ };
+</script>
+
+
+</body>
+</html>
http://git-wip-us.apache.org/repos/asf/orc/blob/6a400548/img/BloomFilter.png
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-<!DOCTYPE html>
-<html>
-<body>
+<!DOCTYPE HTML>
+<html lang="en-US">
+<head>
+ <meta charset="UTF-8">
+ <title>Apache ORC • High-Performance Columnar Storage for Hadoop</title>
+ <meta name="viewport" content="width=device-width,initial-scale=1">
+ <meta name="generator" content="Jekyll v2.4.0">
+ <link rel="stylesheet" href="//fonts.googleapis.com/css?family=Lato:300,300italic,400,400italic,700,700italic,900">
+ <link rel="stylesheet" href="/css/screen.css">
+ <link rel="icon" type="image/x-icon" href="/favicon.ico">
+ <!--[if lt IE 9]>
+ <script src="/js/html5shiv.min.js"></script>
+ <script src="/js/respond.min.js"></script>
+ <![endif]-->
+</head>
-<h1>Apache ORC</h1>
-<p>Placeholder for Apache ORC project.</p>
+<body class="wrap">
+ <header role="banner">
+ <nav class="mobile-nav show-on-mobiles">
+ <ul>
+ <li class="current">
+ <a href="/">Home</a>
+ </li>
+ <li class="">
+ <a href="/docs/">Documentation</a>
+ </li>
+ <li class="">
+ <a href="/talks/">Talks</a>
+ </li>
+ <li class="">
+ <a href="/news/">News</a>
+ </li>
+ <li class="">
+ <a href="/help/">Help</a>
+ </li>
+ <li class="">
+ <a href="/develop/">Develop</a>
+ </li>
+</ul>
+
+ </nav>
+ <div class="grid">
+ <div class="unit one-third center-on-mobiles">
+ <h1>
+ <a href="/">
+ <span class="sr-only">Apache ORC</span>
+ <img src="/img/logo.png" width="249" height="115" alt="ORC Logo">
+ </a>
+ </h1>
+ </div>
+ <nav class="main-nav unit two-thirds hide-on-mobiles">
+ <ul>
+ <li class="current">
+ <a href="/">Home</a>
+ </li>
+ <li class="">
+ <a href="/docs/">Documentation</a>
+ </li>
+ <li class="">
+ <a href="/talks/">Talks</a>
+ </li>
+ <li class="">
+ <a href="/news/">News</a>
+ </li>
+ <li class="">
+ <a href="/help/">Help</a>
+ </li>
+ <li class="">
+ <a href="/develop/">Develop</a>
+ </li>
+</ul>
+
+ </nav>
+ </div>
+</header>
+
+
+ <section class="intro">
+ <div class="grid">
+ <div class="unit whole center-on-mobiles">
+ <p class="first">the smallest, fastest columnar storage for Hadoop
+ workloads.</p>
+ </div>
+ </div>
+</section>
+<section class="features">
+ <div class="grid">
+ <div class="unit one-third">
+ <h2>ACID Support</h2>
+ <p>Includes support for ACID transactions and snapshot
+ isolation</p>
+ <a href="/docs/acid.html">ACID support →</a>
+ </div>
+ <div class="unit one-third">
+ <h2>Built-in Indexes</h2>
+ <p>Jump to the right row with indexes including minimum, maximum,
+ and bloom filters for each column.</p>
+ <a href="/docs/indexes.html">ORC's indexes →</a>
+ </div>
+ <div class="unit one-third">
+ <h2>Complex Types</h2>
+ <p>Supports all of Hive's types including the compound types:
+ structs, lists, maps, and unions</p>
+ <a href="/docs/types.html">ORC's types →</a>
+ </div>
+ <div class="clear"></div>
+ </div>
+</section>
+
+
+ <footer role="contentinfo">
+ <p>The contents of this website are © 2015
+ <a href="https://www.apache.org/">Apache Software Foundation</a>
+ under the terms of the <a
+ href="https://www.apache.org/licenses/LICENSE-2.0.html">
+ Apache License v2</a>. Apache ORC and its logo are trademarks
+ of the Apache Software Foundation.</p>
+</footer>
+
+ <script>
+ var anchorForId = function (id) {
+ var anchor = document.createElement("a");
+ anchor.className = "header-link";
+ anchor.href = "#" + id;
+ anchor.innerHTML = "<span class=\"sr-only\">Permalink</span><i class=\"fa fa-link\"></i>";
+ anchor.title = "Permalink";
+ return anchor;
+ };
+
+ var linkifyAnchors = function (level, containingElement) {
+ var headers = containingElement.getElementsByTagName("h" + level);
+ for (var h = 0; h < headers.length; h++) {
+ var header = headers[h];
+
+ if (typeof header.id !== "undefined" && header.id !== "") {
+ header.appendChild(anchorForId(header.id));
+ }
+ }
+ };
+
+ document.onreadystatechange = function () {
+ if (this.readyState === "complete") {
+ var contentBlock = document.getElementsByClassName("docs")[0] || document.getElementsByClassName("news")[0];
+ if (!contentBlock) {
+ return;
+ }
+ for (var level = 1; level <= 6; level++) {
+ linkifyAnchors(level, contentBlock);
+ }
+ }
+ };
+</script>
+
</body>
</html>
http://git-wip-us.apache.org/repos/asf/orc/blob/6a400548/js/html5shiv.min.js
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http://git-wip-us.apache.org/repos/asf/orc/blob/6a400548/news/2015/04/22/orc-as-tlp/index.html
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+<!DOCTYPE HTML>
+<html lang="en-US">
+<head>
+ <meta charset="UTF-8">
+ <title>ORC becomes an Apache Top Level Project</title>
+ <meta name="viewport" content="width=device-width,initial-scale=1">
+ <meta name="generator" content="Jekyll v2.4.0">
+ <link rel="stylesheet" href="//fonts.googleapis.com/css?family=Lato:300,300italic,400,400italic,700,700italic,900">
+ <link rel="stylesheet" href="/css/screen.css">
+ <link rel="icon" type="image/x-icon" href="/favicon.ico">
+ <!--[if lt IE 9]>
+ <script src="/js/html5shiv.min.js"></script>
+ <script src="/js/respond.min.js"></script>
+ <![endif]-->
+</head>
+
+
+<body class="wrap">
+ <header role="banner">
+ <nav class="mobile-nav show-on-mobiles">
+ <ul>
+ <li class="">
+ <a href="/">Home</a>
+ </li>
+ <li class="">
+ <a href="/docs/">Documentation</a>
+ </li>
+ <li class="">
+ <a href="/talks/">Talks</a>
+ </li>
+ <li class="current">
+ <a href="/news/">News</a>
+ </li>
+ <li class="">
+ <a href="/help/">Help</a>
+ </li>
+ <li class="">
+ <a href="/develop/">Develop</a>
+ </li>
+</ul>
+
+ </nav>
+ <div class="grid">
+ <div class="unit one-third center-on-mobiles">
+ <h1>
+ <a href="/">
+ <span class="sr-only">Apache ORC</span>
+ <img src="/img/logo.png" width="249" height="115" alt="ORC Logo">
+ </a>
+ </h1>
+ </div>
+ <nav class="main-nav unit two-thirds hide-on-mobiles">
+ <ul>
+ <li class="">
+ <a href="/">Home</a>
+ </li>
+ <li class="">
+ <a href="/docs/">Documentation</a>
+ </li>
+ <li class="">
+ <a href="/talks/">Talks</a>
+ </li>
+ <li class="current">
+ <a href="/news/">News</a>
+ </li>
+ <li class="">
+ <a href="/help/">Help</a>
+ </li>
+ <li class="">
+ <a href="/develop/">Develop</a>
+ </li>
+</ul>
+
+ </nav>
+ </div>
+</header>
+
+
+ <section class="news">
+ <div class="grid">
+
+ <div class="docs-nav-mobile unit whole show-on-mobiles">
+ <select onchange="if (this.value) window.location.href=this.value">
+ <option value="">Navigate the blog…</option>
+ <option value="/news/">Home</option>
+ <optgroup label="v1.x">
+
+ <option value="/news/2015/05/11/new-committers/">ORC adds 7 committers</option>
+
+ <option value="/news/2015/04/22/orc-as-tlp/">ORC becomes an Apache Top Level Project</option>
+
+ </optgroup>
+ </select>
+</div>
+
+
+ <div class="unit four-fifths">
+ <article>
+ <h2>
+ ORC becomes an Apache Top Level Project
+ <a href="/news/2015/04/22/orc-as-tlp/" class="permalink" title="Permalink">∞</a>
+ </h2>
+ <span class="post-category">
+ <span class="label">
+ project
+ </span>
+ </span>
+ <div class="post-meta">
+ <span class="post-date">
+ 22 Apr 2015
+ </span>
+ <a href="https://people.apache.org/~omalley" class="post-author">
+ <img src="https://people.apache.org/~omalley/omalley.png"
+ class="avatar" alt="omalley avatar"
+ width="24" height="24">
+ omalley
+ </a>
+ </div>
+ <div class="post-content">
+ <p>Today Apache ORC became a top level project at the Apache Software
+Foundation. This step represents a major step forward for the project,
+and is representative of its momentum.</p>
+
+<p>Back in January 2013, we created ORC files as part of the initiative
+to massively speed up Apache Hive and improve the storage efficiency
+of data stored in Apache Hadoop. We added it as a feature of Hive for
+two reasons:</p>
+
+<ol>
+ <li>To ensure that it would be well integrated with Hive</li>
+ <li>To ensure that storing data in ORC format would be as simple as
+stating “stored as ORC” to your table definition.</li>
+</ol>
+
+<p>In the last two years, many of the features that we’ve added to Hive,
+such as vectorization, ACID, predicate push down and LLAP, support ORC
+first, and follow up with other storage formats later.</p>
+
+<p>The growing use and acceptance of ORC has encouraged additional Hadoop
+execution engines, such as Apache Pig, Map-Reduce, Cascading, and
+Apache Spark to support reading and writing ORC. However, there are
+concerns that depending on the large Hive jar that contains ORC pulls
+in a lot of other projects that Hive depends on. To better support
+these non-Hive users, we decided to split off from Hive and become a
+separate project. This will not only allow us to support Hive, but
+also provide a much more streamlined jar, documentation and help for
+users outside of Hive.</p>
+
+<p>Although Hadoop and its ecosystem are largely written in Java, there
+are a lot of applications in other languages that would like to
+natively access ORC files in HDFS. Hortonworks, HP, and Microsoft are
+developing a pure C++ ORC reader and writer that enables C++
+applications to read and write ORC files efficiently without
+Java. That code will also be moved into Apache ORC and released
+together with the Java implementation.</p>
+
+ </div>
+</article>
+
+ </div>
+
+ <div class="unit one-fifth hide-on-mobiles">
+ <aside>
+ <ul>
+ <li class="">
+ <a href="/news/">All News</a>
+ </li>
+ <li class="">
+ <a href="/news/releases/">ORC Releases</a>
+ </li>
+ </ul>
+ <h4>Recent Releases</h4>
+ <ul>
+
+ </ul>
+ <h4>Other News</h4>
+ <ul>
+
+
+ <li class="">
+ <a href="/news/2015/05/11/new-committers/">ORC adds 7 committers</a>
+ </li>
+
+
+
+ <li class="current">
+ <a href="/news/2015/04/22/orc-as-tlp/">ORC becomes an Apache Top Level Project</a>
+ </li>
+
+
+ </ul>
+ </aside>
+</div>
+
+
+ <div class="clear"></div>
+
+ </div>
+ </section>
+
+
+ <footer role="contentinfo">
+ <p>The contents of this website are © 2015
+ <a href="https://www.apache.org/">Apache Software Foundation</a>
+ under the terms of the <a
+ href="https://www.apache.org/licenses/LICENSE-2.0.html">
+ Apache License v2</a>. Apache ORC and its logo are trademarks
+ of the Apache Software Foundation.</p>
+</footer>
+
+ <script>
+ var anchorForId = function (id) {
+ var anchor = document.createElement("a");
+ anchor.className = "header-link";
+ anchor.href = "#" + id;
+ anchor.innerHTML = "<span class=\"sr-only\">Permalink</span><i class=\"fa fa-link\"></i>";
+ anchor.title = "Permalink";
+ return anchor;
+ };
+
+ var linkifyAnchors = function (level, containingElement) {
+ var headers = containingElement.getElementsByTagName("h" + level);
+ for (var h = 0; h < headers.length; h++) {
+ var header = headers[h];
+
+ if (typeof header.id !== "undefined" && header.id !== "") {
+ header.appendChild(anchorForId(header.id));
+ }
+ }
+ };
+
+ document.onreadystatechange = function () {
+ if (this.readyState === "complete") {
+ var contentBlock = document.getElementsByClassName("docs")[0] || document.getElementsByClassName("news")[0];
+ if (!contentBlock) {
+ return;
+ }
+ for (var level = 1; level <= 6; level++) {
+ linkifyAnchors(level, contentBlock);
+ }
+ }
+ };
+</script>
+
+
+</body>
+</html>
http://git-wip-us.apache.org/repos/asf/orc/blob/6a400548/news/2015/05/11/new-committers/index.html
----------------------------------------------------------------------
diff --git a/news/2015/05/11/new-committers/index.html b/news/2015/05/11/new-committers/index.html
new file mode 100644
index 0000000..33cdfb9
--- /dev/null
+++ b/news/2015/05/11/new-committers/index.html
@@ -0,0 +1,223 @@
+<!DOCTYPE HTML>
+<html lang="en-US">
+<head>
+ <meta charset="UTF-8">
+ <title>ORC adds 7 committers</title>
+ <meta name="viewport" content="width=device-width,initial-scale=1">
+ <meta name="generator" content="Jekyll v2.4.0">
+ <link rel="stylesheet" href="//fonts.googleapis.com/css?family=Lato:300,300italic,400,400italic,700,700italic,900">
+ <link rel="stylesheet" href="/css/screen.css">
+ <link rel="icon" type="image/x-icon" href="/favicon.ico">
+ <!--[if lt IE 9]>
+ <script src="/js/html5shiv.min.js"></script>
+ <script src="/js/respond.min.js"></script>
+ <![endif]-->
+</head>
+
+
+<body class="wrap">
+ <header role="banner">
+ <nav class="mobile-nav show-on-mobiles">
+ <ul>
+ <li class="">
+ <a href="/">Home</a>
+ </li>
+ <li class="">
+ <a href="/docs/">Documentation</a>
+ </li>
+ <li class="">
+ <a href="/talks/">Talks</a>
+ </li>
+ <li class="current">
+ <a href="/news/">News</a>
+ </li>
+ <li class="">
+ <a href="/help/">Help</a>
+ </li>
+ <li class="">
+ <a href="/develop/">Develop</a>
+ </li>
+</ul>
+
+ </nav>
+ <div class="grid">
+ <div class="unit one-third center-on-mobiles">
+ <h1>
+ <a href="/">
+ <span class="sr-only">Apache ORC</span>
+ <img src="/img/logo.png" width="249" height="115" alt="ORC Logo">
+ </a>
+ </h1>
+ </div>
+ <nav class="main-nav unit two-thirds hide-on-mobiles">
+ <ul>
+ <li class="">
+ <a href="/">Home</a>
+ </li>
+ <li class="">
+ <a href="/docs/">Documentation</a>
+ </li>
+ <li class="">
+ <a href="/talks/">Talks</a>
+ </li>
+ <li class="current">
+ <a href="/news/">News</a>
+ </li>
+ <li class="">
+ <a href="/help/">Help</a>
+ </li>
+ <li class="">
+ <a href="/develop/">Develop</a>
+ </li>
+</ul>
+
+ </nav>
+ </div>
+</header>
+
+
+ <section class="news">
+ <div class="grid">
+
+ <div class="docs-nav-mobile unit whole show-on-mobiles">
+ <select onchange="if (this.value) window.location.href=this.value">
+ <option value="">Navigate the blog…</option>
+ <option value="/news/">Home</option>
+ <optgroup label="v1.x">
+
+ <option value="/news/2015/05/11/new-committers/">ORC adds 7 committers</option>
+
+ <option value="/news/2015/04/22/orc-as-tlp/">ORC becomes an Apache Top Level Project</option>
+
+ </optgroup>
+ </select>
+</div>
+
+
+ <div class="unit four-fifths">
+ <article>
+ <h2>
+ ORC adds 7 committers
+ <a href="/news/2015/05/11/new-committers/" class="permalink" title="Permalink">∞</a>
+ </h2>
+ <span class="post-category">
+ <span class="label">
+ team
+ </span>
+ </span>
+ <div class="post-meta">
+ <span class="post-date">
+ 11 May 2015
+ </span>
+ <a href="https://people.apache.org/~omalley" class="post-author">
+ <img src="https://people.apache.org/~omalley/omalley.png"
+ class="avatar" alt="omalley avatar"
+ width="24" height="24">
+ omalley
+ </a>
+ </div>
+ <div class="post-content">
+ <p>The ORC project management committee today added seven new committers
+for their work on ORC. Welcome all!</p>
+
+<ul>
+ <li>Gunther Hagleitner</li>
+ <li>Aliaksei Sandryhaila</li>
+ <li>Sergey Shelukhin</li>
+ <li>Gopal Vijayaraghavan</li>
+ <li>Stephen Walkauskas</li>
+ <li>Kevin Wilfong</li>
+ <li>Xuefu Zhang</li>
+</ul>
+
+ </div>
+</article>
+
+ </div>
+
+ <div class="unit one-fifth hide-on-mobiles">
+ <aside>
+ <ul>
+ <li class="">
+ <a href="/news/">All News</a>
+ </li>
+ <li class="">
+ <a href="/news/releases/">ORC Releases</a>
+ </li>
+ </ul>
+ <h4>Recent Releases</h4>
+ <ul>
+
+ </ul>
+ <h4>Other News</h4>
+ <ul>
+
+
+ <li class="current">
+ <a href="/news/2015/05/11/new-committers/">ORC adds 7 committers</a>
+ </li>
+
+
+
+ <li class="">
+ <a href="/news/2015/04/22/orc-as-tlp/">ORC becomes an Apache Top Level Project</a>
+ </li>
+
+
+ </ul>
+ </aside>
+</div>
+
+
+ <div class="clear"></div>
+
+ </div>
+ </section>
+
+
+ <footer role="contentinfo">
+ <p>The contents of this website are © 2015
+ <a href="https://www.apache.org/">Apache Software Foundation</a>
+ under the terms of the <a
+ href="https://www.apache.org/licenses/LICENSE-2.0.html">
+ Apache License v2</a>. Apache ORC and its logo are trademarks
+ of the Apache Software Foundation.</p>
+</footer>
+
+ <script>
+ var anchorForId = function (id) {
+ var anchor = document.createElement("a");
+ anchor.className = "header-link";
+ anchor.href = "#" + id;
+ anchor.innerHTML = "<span class=\"sr-only\">Permalink</span><i class=\"fa fa-link\"></i>";
+ anchor.title = "Permalink";
+ return anchor;
+ };
+
+ var linkifyAnchors = function (level, containingElement) {
+ var headers = containingElement.getElementsByTagName("h" + level);
+ for (var h = 0; h < headers.length; h++) {
+ var header = headers[h];
+
+ if (typeof header.id !== "undefined" && header.id !== "") {
+ header.appendChild(anchorForId(header.id));
+ }
+ }
+ };
+
+ document.onreadystatechange = function () {
+ if (this.readyState === "complete") {
+ var contentBlock = document.getElementsByClassName("docs")[0] || document.getElementsByClassName("news")[0];
+ if (!contentBlock) {
+ return;
+ }
+ for (var level = 1; level <= 6; level++) {
+ linkifyAnchors(level, contentBlock);
+ }
+ }
+ };
+</script>
+
+
+</body>
+</html>
http://git-wip-us.apache.org/repos/asf/orc/blob/6a400548/news/index.html
----------------------------------------------------------------------
diff --git a/news/index.html b/news/index.html
new file mode 100644
index 0000000..e932264
--- /dev/null
+++ b/news/index.html
@@ -0,0 +1,296 @@
+<!DOCTYPE HTML>
+<html lang="en-US">
+<head>
+ <meta charset="UTF-8">
+ <title>News</title>
+ <meta name="viewport" content="width=device-width,initial-scale=1">
+ <meta name="generator" content="Jekyll v2.4.0">
+ <link rel="stylesheet" href="//fonts.googleapis.com/css?family=Lato:300,300italic,400,400italic,700,700italic,900">
+ <link rel="stylesheet" href="/css/screen.css">
+ <link rel="icon" type="image/x-icon" href="/favicon.ico">
+ <!--[if lt IE 9]>
+ <script src="/js/html5shiv.min.js"></script>
+ <script src="/js/respond.min.js"></script>
+ <![endif]-->
+</head>
+
+
+<body class="wrap">
+ <header role="banner">
+ <nav class="mobile-nav show-on-mobiles">
+ <ul>
+ <li class="">
+ <a href="/">Home</a>
+ </li>
+ <li class="">
+ <a href="/docs/">Documentation</a>
+ </li>
+ <li class="">
+ <a href="/talks/">Talks</a>
+ </li>
+ <li class="current">
+ <a href="/news/">News</a>
+ </li>
+ <li class="">
+ <a href="/help/">Help</a>
+ </li>
+ <li class="">
+ <a href="/develop/">Develop</a>
+ </li>
+</ul>
+
+ </nav>
+ <div class="grid">
+ <div class="unit one-third center-on-mobiles">
+ <h1>
+ <a href="/">
+ <span class="sr-only">Apache ORC</span>
+ <img src="/img/logo.png" width="249" height="115" alt="ORC Logo">
+ </a>
+ </h1>
+ </div>
+ <nav class="main-nav unit two-thirds hide-on-mobiles">
+ <ul>
+ <li class="">
+ <a href="/">Home</a>
+ </li>
+ <li class="">
+ <a href="/docs/">Documentation</a>
+ </li>
+ <li class="">
+ <a href="/talks/">Talks</a>
+ </li>
+ <li class="current">
+ <a href="/news/">News</a>
+ </li>
+ <li class="">
+ <a href="/help/">Help</a>
+ </li>
+ <li class="">
+ <a href="/develop/">Develop</a>
+ </li>
+</ul>
+
+ </nav>
+ </div>
+</header>
+
+
+ <section class="news">
+ <div class="grid">
+
+ <div class="docs-nav-mobile unit whole show-on-mobiles">
+ <select onchange="if (this.value) window.location.href=this.value">
+ <option value="">Navigate the blog…</option>
+ <option value="/news/">Home</option>
+ <optgroup label="v1.x">
+
+ <option value="/news/2015/05/11/new-committers/">ORC adds 7 committers</option>
+
+ <option value="/news/2015/04/22/orc-as-tlp/">ORC becomes an Apache Top Level Project</option>
+
+ </optgroup>
+ </select>
+</div>
+
+
+ <div class="unit four-fifths">
+
+ <article>
+ <h2>
+ <a href="/news/2015/05/11/new-committers/">
+ ORC adds 7 committers
+ </a>
+ </h2>
+ <span class="post-category">
+ <span class="label">
+ team
+ </span>
+ </span>
+ <div class="post-meta">
+ <span class="post-date">
+ 11 May 2015
+ </span>
+ <a href="https://github.com/omalley" class="post-author">
+ <img src="https://github.com/omalley.png" class="avatar" alt="omalley avatar" width="24" height="24">
+ omalley
+ </a>
+ </div>
+ <div class="post-content">
+ <p>The ORC project management committee today added seven new committers
+for their work on ORC. Welcome all!</p>
+
+<ul>
+ <li>Gunther Hagleitner</li>
+ <li>Aliaksei Sandryhaila</li>
+ <li>Sergey Shelukhin</li>
+ <li>Gopal Vijayaraghavan</li>
+ <li>Stephen Walkauskas</li>
+ <li>Kevin Wilfong</li>
+ <li>Xuefu Zhang</li>
+</ul>
+
+ </div>
+</article>
+
+
+ <article>
+ <h2>
+ <a href="/news/2015/04/22/orc-as-tlp/">
+ ORC becomes an Apache Top Level Project
+ </a>
+ </h2>
+ <span class="post-category">
+ <span class="label">
+ project
+ </span>
+ </span>
+ <div class="post-meta">
+ <span class="post-date">
+ 22 Apr 2015
+ </span>
+ <a href="https://github.com/omalley" class="post-author">
+ <img src="https://github.com/omalley.png" class="avatar" alt="omalley avatar" width="24" height="24">
+ omalley
+ </a>
+ </div>
+ <div class="post-content">
+ <p>Today Apache ORC became a top level project at the Apache Software
+Foundation. This step represents a major step forward for the project,
+and is representative of its momentum.</p>
+
+<p>Back in January 2013, we created ORC files as part of the initiative
+to massively speed up Apache Hive and improve the storage efficiency
+of data stored in Apache Hadoop. We added it as a feature of Hive for
+two reasons:</p>
+
+<ol>
+ <li>To ensure that it would be well integrated with Hive</li>
+ <li>To ensure that storing data in ORC format would be as simple as
+stating “stored as ORC” to your table definition.</li>
+</ol>
+
+<p>In the last two years, many of the features that we’ve added to Hive,
+such as vectorization, ACID, predicate push down and LLAP, support ORC
+first, and follow up with other storage formats later.</p>
+
+<p>The growing use and acceptance of ORC has encouraged additional Hadoop
+execution engines, such as Apache Pig, Map-Reduce, Cascading, and
+Apache Spark to support reading and writing ORC. However, there are
+concerns that depending on the large Hive jar that contains ORC pulls
+in a lot of other projects that Hive depends on. To better support
+these non-Hive users, we decided to split off from Hive and become a
+separate project. This will not only allow us to support Hive, but
+also provide a much more streamlined jar, documentation and help for
+users outside of Hive.</p>
+
+<p>Although Hadoop and its ecosystem are largely written in Java, there
+are a lot of applications in other languages that would like to
+natively access ORC files in HDFS. Hortonworks, HP, and Microsoft are
+developing a pure C++ ORC reader and writer that enables C++
+applications to read and write ORC files efficiently without
+Java. That code will also be moved into Apache ORC and released
+together with the Java implementation.</p>
+
+ </div>
+</article>
+
+
+
+<p></p>
+
+<h2>ORC Twitter</h2>
+
+<p>The official <a href="https://twitter.com/apacheorc">@ApacheOrc</a>
+Twitter account pushes announcements about ORC. If you give a talk about
+ORC, let us know and we'll tweet it out and add it to the news section
+of the website.</p>
+
+ </div>
+
+ <div class="unit one-fifth hide-on-mobiles">
+ <aside>
+ <ul>
+ <li class="current">
+ <a href="/news/">All News</a>
+ </li>
+ <li class="">
+ <a href="/news/releases/">ORC Releases</a>
+ </li>
+ </ul>
+ <h4>Recent Releases</h4>
+ <ul>
+
+ </ul>
+ <h4>Other News</h4>
+ <ul>
+
+
+ <li class="">
+ <a href="/news/2015/05/11/new-committers/">ORC adds 7 committers</a>
+ </li>
+
+
+
+ <li class="">
+ <a href="/news/2015/04/22/orc-as-tlp/">ORC becomes an Apache Top Level Project</a>
+ </li>
+
+
+ </ul>
+ </aside>
+</div>
+
+
+ <div class="clear"></div>
+
+ </div>
+ </section>
+
+
+ <footer role="contentinfo">
+ <p>The contents of this website are © 2015
+ <a href="https://www.apache.org/">Apache Software Foundation</a>
+ under the terms of the <a
+ href="https://www.apache.org/licenses/LICENSE-2.0.html">
+ Apache License v2</a>. Apache ORC and its logo are trademarks
+ of the Apache Software Foundation.</p>
+</footer>
+
+ <script>
+ var anchorForId = function (id) {
+ var anchor = document.createElement("a");
+ anchor.className = "header-link";
+ anchor.href = "#" + id;
+ anchor.innerHTML = "<span class=\"sr-only\">Permalink</span><i class=\"fa fa-link\"></i>";
+ anchor.title = "Permalink";
+ return anchor;
+ };
+
+ var linkifyAnchors = function (level, containingElement) {
+ var headers = containingElement.getElementsByTagName("h" + level);
+ for (var h = 0; h < headers.length; h++) {
+ var header = headers[h];
+
+ if (typeof header.id !== "undefined" && header.id !== "") {
+ header.appendChild(anchorForId(header.id));
+ }
+ }
+ };
+
+ document.onreadystatechange = function () {
+ if (this.readyState === "complete") {
+ var contentBlock = document.getElementsByClassName("docs")[0] || document.getElementsByClassName("news")[0];
+ if (!contentBlock) {
+ return;
+ }
+ for (var level = 1; level <= 6; level++) {
+ linkifyAnchors(level, contentBlock);
+ }
+ }
+ };
+</script>
+
+
+</body>
+</html>
http://git-wip-us.apache.org/repos/asf/orc/blob/6a400548/news/releases/index.html
----------------------------------------------------------------------
diff --git a/news/releases/index.html b/news/releases/index.html
new file mode 100644
index 0000000..263067d
--- /dev/null
+++ b/news/releases/index.html
@@ -0,0 +1,187 @@
+<!DOCTYPE HTML>
+<html lang="en-US">
+<head>
+ <meta charset="UTF-8">
+ <title>Releases</title>
+ <meta name="viewport" content="width=device-width,initial-scale=1">
+ <meta name="generator" content="Jekyll v2.4.0">
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+
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+ <h4>Other News</h4>
+ <ul>
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+ <a href="/news/2015/05/11/new-committers/">ORC adds 7 committers</a>
+ </li>
+
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+
+ <li class="">
+ <a href="/news/2015/04/22/orc-as-tlp/">ORC becomes an Apache Top Level Project</a>
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http://git-wip-us.apache.org/repos/asf/orc/blob/6a400548/talks/index.html
----------------------------------------------------------------------
diff --git a/talks/index.html b/talks/index.html
new file mode 100644
index 0000000..70db223
--- /dev/null
+++ b/talks/index.html
@@ -0,0 +1,193 @@
+<!DOCTYPE HTML>
+<html lang="en-US">
+<head>
+ <meta charset="UTF-8">
+ <title>ORC Talks</title>
+ <meta name="viewport" content="width=device-width,initial-scale=1">
+ <meta name="generator" content="Jekyll v2.4.0">
+ <link rel="stylesheet" href="//fonts.googleapis.com/css?family=Lato:300,300italic,400,400italic,700,700italic,900">
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+</ul>
+
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+ <div class="grid">
+ <div class="unit one-third center-on-mobiles">
+ <h1>
+ <a href="/">
+ <span class="sr-only">Apache ORC</span>
+ <img src="/img/logo.png" width="249" height="115" alt="ORC Logo">
+ </a>
+ </h1>
+ </div>
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+ <ul>
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+</header>
+
+
+ <section class="standalone">
+ <div class="grid">
+
+ <div class="unit whole">
+ <article>
+ <h1>ORC Talks</h1>
+ <p>Want to learn more about ORC?</p>
+
+<p>Watch some presentations and read through some slide decks about ORC.</p>
+
+<h2 id="videos">Videos</h2>
+
+<ul>
+ <li>
+ <p>ORC File & Vectorization - Improving Hive Data Storage and Query Performance
+<a href="http://www.slideshare.net/oom65/orc-andvectorizationhadoopsummit">slides</a></p>
+
+ <p>Owen O’Malley and Eric Hanson at Hadoop Summit: San Jose 2013</p>
+
+ <iframe width="420" height="315" src="https://www.youtube.com/embed/GV7vpR7vpjM" frameborder="0" allowfullscreen=""></iframe>
+ </li>
+ <li>
+ <p>ORC 2015: Faster, Better, Smaller
+<a href="http://www.slideshare.net/t3rmin4t0r/orc-2015">slides</a></p>
+
+ <p>Gopal Vijayaraghavan at Hadoop Summit: Brussels 2015</p>
+
+ <iframe width="560" height="315" src="https://www.youtube.com/embed/Jd4lFEK8gCM" frameborder="0" allowfullscreen=""></iframe>
+ </li>
+ <li>
+ <p>Adding ACID Updates to Hive
+<a href="http://www.slideshare.net/alanfgates/hive-acidupdatessummitsjc2014">slides</a></p>
+
+ <p>Owen O’Malley and Alan Gates at Hadoop Summit: San Jose 2014</p>
+
+ <iframe width="560" height="315" src="https://www.youtube.com/embed/_A-GMkIygtU" frameborder="0" allowfullscreen=""></iframe>
+ </li>
+</ul>
+
+<h2 id="slides">Slides</h2>
+
+<ul>
+ <li>
+ <p>ORC Files</p>
+
+ <p>Owen O’Malley at Berlin Buzzwords 2013</p>
+
+ <iframe src="//www.slideshare.net/slideshow/embed_code/key/nUhPBgqm1xzJCG" width="425" height="355" frameborder="0" marginwidth="0" marginheight="0" scrolling="no" style="border:1px solid #CCC; border-width:1px;
+ margin-bottom:5px; max-width: 100%;" allowfullscreen=""> </iframe>
+ </li>
+ <li>
+ <p>A Perfect Hive Query for a Perfect Meeting</p>
+
+ <p>Adam Kawa at Hadoop Summit: San Jose 2014</p>
+
+ <iframe src="//www.slideshare.net/slideshow/embed_code/key/4CLFxVy90yBJ3J" width="425" height="355" frameborder="0" marginwidth="0" marginheight="0" scrolling="no" style="border:1px solid #CCC;
+ border-width:1px; margin-bottom:5px; max-width: 100%;" allowfullscreen=""> </iframe>
+ </li>
+</ul>
+
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+ </div>
+
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+
+ </div>
+</section>
+
+
+ <footer role="contentinfo">
+ <p>The contents of this website are © 2015
+ <a href="https://www.apache.org/">Apache Software Foundation</a>
+ under the terms of the <a
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+ Apache License v2</a>. Apache ORC and its logo are trademarks
+ of the Apache Software Foundation.</p>
+</footer>
+
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+</body>
+</html>
[2/8] orc git commit: Publish first version of site.
Posted by om...@apache.org.
http://git-wip-us.apache.org/repos/asf/orc/blob/6a400548/fonts/fontawesome-webfont.svg
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diff --git a/fonts/fontawesome-webfont.svg b/fonts/fontawesome-webfont.svg
new file mode 100755
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<TRUNCATED>
http://git-wip-us.apache.org/repos/asf/orc/blob/6a400548/fonts/fontawesome-webfont.ttf
----------------------------------------------------------------------
diff --git a/fonts/fontawesome-webfont.ttf b/fonts/fontawesome-webfont.ttf
new file mode 100755
index 0000000..96a3639
Binary files /dev/null and b/fonts/fontawesome-webfont.ttf differ
[6/8] orc git commit: Publish first version of site.
Posted by om...@apache.org.
Publish first version of site.
Project: http://git-wip-us.apache.org/repos/asf/orc/repo
Commit: http://git-wip-us.apache.org/repos/asf/orc/commit/6a400548
Tree: http://git-wip-us.apache.org/repos/asf/orc/tree/6a400548
Diff: http://git-wip-us.apache.org/repos/asf/orc/diff/6a400548
Branch: refs/heads/asf-site
Commit: 6a4005483a2f42120aa5731ad6a20afeb3a96bd3
Parents: 9192d88
Author: Owen O'Malley <om...@apache.org>
Authored: Tue May 12 20:42:25 2015 -0700
Committer: Owen O'Malley <om...@apache.org>
Committed: Tue May 12 20:42:25 2015 -0700
----------------------------------------------------------------------
css/screen.css | 1405 +++++++++++++++++++++
develop/coding.html | 184 +++
develop/index.html | 252 ++++
doap_orc.rdf | 55 +
docs/acid.html | 1179 +++++++++++++++++
docs/compression.html | 1005 +++++++++++++++
docs/encodings.html | 1600 ++++++++++++++++++++++++
docs/file-tail.html | 1288 +++++++++++++++++++
docs/hive-config.html | 1184 ++++++++++++++++++
docs/hive-ddl.html | 998 +++++++++++++++
docs/index.html | 984 +++++++++++++++
docs/indexes.html | 989 +++++++++++++++
docs/run-length.html | 1377 ++++++++++++++++++++
docs/spec-index.html | 1108 ++++++++++++++++
docs/spec-intro.html | 993 +++++++++++++++
docs/stripes.html | 1066 ++++++++++++++++
docs/types.html | 1035 +++++++++++++++
downloads/index.html | 142 +++
favicon.ico | Bin 0 -> 1150 bytes
fonts/fontawesome-webfont.eot | Bin 0 -> 56006 bytes
fonts/fontawesome-webfont.svg | 520 ++++++++
fonts/fontawesome-webfont.ttf | Bin 0 -> 112160 bytes
fonts/fontawesome-webfont.woff | Bin 0 -> 65452 bytes
help/index.html | 167 +++
img/BloomFilter.png | Bin 0 -> 61887 bytes
img/CompressionStream.png | Bin 0 -> 91623 bytes
img/OrcFileLayout.png | Bin 0 -> 127908 bytes
img/TreeWriters.png | Bin 0 -> 134465 bytes
img/logo.png | Bin 0 -> 6950 bytes
index.html | 157 ++-
js/html5shiv.min.js | 4 +
js/respond.min.js | 5 +
news/2015/04/22/orc-as-tlp/index.html | 247 ++++
news/2015/05/11/new-committers/index.html | 223 ++++
news/index.html | 296 +++++
news/releases/index.html | 187 +++
talks/index.html | 193 +++
37 files changed, 18838 insertions(+), 5 deletions(-)
----------------------------------------------------------------------
http://git-wip-us.apache.org/repos/asf/orc/blob/6a400548/css/screen.css
----------------------------------------------------------------------
diff --git a/css/screen.css b/css/screen.css
new file mode 100644
index 0000000..3870839
--- /dev/null
+++ b/css/screen.css
@@ -0,0 +1,1405 @@
+@charset "UTF-8";
+/*! normalize.css v3.0.2 | MIT License | git.io/normalize */
+html {
+ font-family: sans-serif;
+ -ms-text-size-adjust: 100%;
+ -webkit-text-size-adjust: 100%; }
+
+body {
+ margin: 0; }
+
+article, aside, details, figcaption, figure, footer, header, hgroup, main, menu, nav, section, summary {
+ display: block; }
+
+audio, canvas, progress, video {
+ display: inline-block;
+ vertical-align: baseline; }
+
+audio:not([controls]) {
+ display: none;
+ height: 0; }
+
+[hidden], template {
+ display: none; }
+
+a {
+ background-color: transparent; }
+
+a:active, a:hover {
+ outline: 0; }
+
+abbr[title] {
+ border-bottom: 1px dotted; }
+
+b, strong {
+ font-weight: 700; }
+
+dfn {
+ font-style: italic; }
+
+h1 {
+ font-size: 2em;
+ margin: .67em 0; }
+
+mark {
+ background: #ff0;
+ color: #000; }
+
+small {
+ font-size: 80%; }
+
+sub, sup {
+ font-size: 75%;
+ line-height: 0;
+ position: relative;
+ vertical-align: baseline; }
+
+sup {
+ top: -.5em; }
+
+sub {
+ bottom: -.25em; }
+
+img {
+ border: 0; }
+
+svg:not(:root) {
+ overflow: hidden; }
+
+figure {
+ margin: 1em 40px; }
+
+hr {
+ -moz-box-sizing: content-box;
+ box-sizing: content-box;
+ height: 0; }
+
+pre {
+ overflow: auto; }
+
+code, kbd, pre, samp {
+ font-family: monospace,monospace;
+ font-size: 1em; }
+
+button, input, optgroup, select, textarea {
+ color: inherit;
+ font: inherit;
+ margin: 0; }
+
+button {
+ overflow: visible; }
+
+button, select {
+ text-transform: none; }
+
+button, html input[type=button], input[type=reset], input[type=submit] {
+ -webkit-appearance: button;
+ cursor: pointer; }
+
+button[disabled], html input[disabled] {
+ cursor: default; }
+
+button::-moz-focus-inner, input::-moz-focus-inner {
+ border: 0;
+ padding: 0; }
+
+input {
+ line-height: normal; }
+
+input[type=checkbox], input[type=radio] {
+ box-sizing: border-box;
+ padding: 0; }
+
+input[type=number]::-webkit-inner-spin-button, input[type=number]::-webkit-outer-spin-button {
+ height: auto; }
+
+input[type=search] {
+ -webkit-appearance: textfield;
+ -moz-box-sizing: content-box;
+ -webkit-box-sizing: content-box;
+ box-sizing: content-box; }
+
+input[type=search]::-webkit-search-cancel-button, input[type=search]::-webkit-search-decoration {
+ -webkit-appearance: none; }
+
+fieldset {
+ border: 1px solid silver;
+ margin: 0 2px;
+ padding: .35em .625em .75em; }
+
+legend {
+ border: 0;
+ padding: 0; }
+
+textarea {
+ overflow: auto; }
+
+optgroup {
+ font-weight: 700; }
+
+table {
+ border-collapse: collapse;
+ border-spacing: 0; }
+
+td, th {
+ padding: 0; }
+
+/*
+ * Gridism
+ * A simple, responsive, and handy CSS grid by @cobyism
+ * https://github.com/cobyism/gridism
+ */
+/* Preserve some sanity */
+.grid,
+.unit {
+ -webkit-box-sizing: border-box;
+ -moz-box-sizing: border-box;
+ box-sizing: border-box; }
+
+/* Set up some rules to govern the grid */
+.grid {
+ display: block;
+ clear: both; }
+
+.grid .unit {
+ float: left;
+ width: 100%;
+ padding: 10px; }
+
+/* This ensures the outer gutters are equal to the (doubled) inner gutters. */
+.grid .unit:first-child {
+ padding-left: 20px; }
+
+.grid .unit:last-child {
+ padding-right: 20px; }
+
+/* Nested grids already have padding though, so let’s nuke it */
+.unit .unit:first-child {
+ padding-left: 0; }
+
+.unit .unit:last-child {
+ padding-right: 0; }
+
+.unit .grid:first-child > .unit {
+ padding-top: 0; }
+
+.unit .grid:last-child > .unit {
+ padding-bottom: 0; }
+
+/* Let people nuke the gutters/padding completely in a couple of ways */
+.no-gutters .unit,
+.unit.no-gutters {
+ padding: 0 !important; }
+
+/* Wrapping at a maximum width is optional */
+.wrap .grid,
+.grid.wrap {
+ max-width: 978px;
+ margin: 0 auto; }
+
+/* Width classes also have shorthand versions numbered as fractions
+ * For example: for a grid unit 1/3 (one third) of the parent width,
+ * simply apply class="w-1-3" to the element. */
+.grid .whole, .grid .w-1-1 {
+ width: 100%; }
+
+.grid .half, .grid .w-1-2 {
+ width: 50%; }
+
+.grid .one-third, .grid .w-1-3 {
+ width: 33.3332%; }
+
+.grid .two-thirds, .grid .w-2-3 {
+ width: 66.6665%; }
+
+.grid .one-quarter,
+.grid .one-fourth, .grid .w-1-4 {
+ width: 25%; }
+
+.grid .three-quarters,
+.grid .three-fourths, .grid .w-3-4 {
+ width: 75%; }
+
+.grid .one-fifth, .grid .w-1-5 {
+ width: 20%; }
+
+.grid .two-fifths, .grid .w-2-5 {
+ width: 40%; }
+
+.grid .three-fifths, .grid .w-3-5 {
+ width: 60%; }
+
+.grid .four-fifths, .grid .w-4-5 {
+ width: 80%; }
+
+.grid .golden-small, .grid .w-g-s {
+ width: 38.2716%; }
+
+/* Golden section: smaller piece */
+.grid .golden-large, .grid .w-g-l {
+ width: 61.7283%; }
+
+/* Golden section: larger piece */
+/* Clearfix after every .grid */
+.grid {
+ *zoom: 1; }
+
+.grid:before, .grid:after {
+ display: table;
+ content: "";
+ line-height: 0; }
+
+.grid:after {
+ clear: both; }
+
+/* Utility classes */
+.align-center {
+ text-align: center; }
+
+.align-left {
+ text-align: left; }
+
+.align-right {
+ text-align: right; }
+
+.pull-left {
+ float: left; }
+
+.pull-right {
+ float: right; }
+
+/* A property for a better rendering of images in units: in
+ this way bigger pictures are just resized if the unit
+ becomes smaller */
+.unit img {
+ max-width: 100%; }
+
+/* Responsive Stuff */
+@media screen and (max-width: 568px) {
+ /* Stack anything that isn’t full-width on smaller screens
+ and doesn't provide the no-stacking-on-mobiles class */
+ .grid:not(.no-stacking-on-mobiles) > .unit {
+ width: 100% !important;
+ padding-left: 20px;
+ padding-right: 20px; }
+
+ .unit .grid .unit {
+ padding-left: 0px;
+ padding-right: 0px; }
+
+ /* Sometimes, you just want to be different on small screens */
+ .center-on-mobiles {
+ text-align: center !important; }
+
+ .hide-on-mobiles {
+ display: none !important; } }
+/* Expand the wrap a bit further on larger screens */
+@media screen and (min-width: 1180px) {
+ .wider .grid,
+ .grid.wider {
+ max-width: 1180px;
+ margin: 0 auto; } }
+.highlight {
+ /* Comment */
+ /* Error */
+ /* Generic */
+ /* Keyword */
+ /* Literal */
+ /* Name */
+ /* Operator */
+ /* Other */
+ /* Punctuation */
+ /* Comment.Multiline */
+ /* Comment.Preproc */
+ /* Comment.Single */
+ /* Comment.Special */
+ /* Generic.Deleted */
+ /* Generic.Emph */
+ /* Generic.Error */
+ /* Generic.Heading */
+ /* Generic.Inserted */
+ /* Generic.Output, qualified with span to prevent applying this style to the Go language, see #1153. */
+ /* Generic.Prompt */
+ /* Generic.Strong */
+ /* Generic.Subheading */
+ /* Generic.Traceback */
+ /* Keyword.Constant */
+ /* Keyword.Declaration */
+ /* Keyword.Namespace */
+ /* Keyword.Pseudo */
+ /* Keyword.Reserved */
+ /* Keyword.Type */
+ /* Literal.Date */
+ /* Literal.Number */
+ /* Literal.String */
+ /* Name.Attribute */
+ /* Name.Builtin */
+ /* Name.Class */
+ /* Name.Constant */
+ /* Name.Decorator */
+ /* Name.Entity */
+ /* Name.Exception */
+ /* Name.Function */
+ /* Name.Label */
+ /* Name.Namespace */
+ /* Name.Other */
+ /* Name.Property */
+ /* Name.Tag */
+ /* Name.Variable */
+ /* Operator.Word */
+ /* Text.Whitespace */
+ /* Literal.Number.Float */
+ /* Literal.Number.Hex */
+ /* Literal.Number.Integer */
+ /* Literal.Number.Oct */
+ /* Literal.String.Backtick */
+ /* Literal.String.Char */
+ /* Literal.String.Doc */
+ /* Literal.String.Double */
+ /* Literal.String.Escape */
+ /* Literal.String.Heredoc */
+ /* Literal.String.Interpol */
+ /* Literal.String.Other */
+ /* Literal.String.Regex */
+ /* Literal.String.Single */
+ /* Literal.String.Symbol */
+ /* Name.Builtin.Pseudo */
+ /* Name.Variable.Class */
+ /* Name.Variable.Global */
+ /* Name.Variable.Instance */
+ /* Literal.Number.Integer.Long */ }
+ .highlight .hll {
+ background-color: #ffffcc; }
+ .highlight .c {
+ color: #87ceeb; }
+ .highlight .err {
+ color: #ffffff; }
+ .highlight .g {
+ color: #ffffff; }
+ .highlight .k {
+ color: #f0e68c; }
+ .highlight .l {
+ color: #ffffff; }
+ .highlight .n {
+ color: #ffffff; }
+ .highlight .o {
+ color: #ffffff; }
+ .highlight .x {
+ color: #ffffff; }
+ .highlight .p {
+ color: #ffffff; }
+ .highlight .cm {
+ color: #87ceeb; }
+ .highlight .cp {
+ color: #cd5c5c; }
+ .highlight .c1 {
+ color: #87ceeb; }
+ .highlight .cs {
+ color: #87ceeb; }
+ .highlight .gd {
+ color: #0000c0;
+ font-weight: bold;
+ background-color: #008080; }
+ .highlight .ge {
+ color: #c000c0;
+ text-decoration: underline; }
+ .highlight .gr {
+ color: #c0c0c0;
+ font-weight: bold;
+ background-color: #c00000; }
+ .highlight .gh {
+ color: #cd5c5c; }
+ .highlight .gi {
+ color: #ffffff;
+ background-color: #0000c0; }
+ .highlight span.go {
+ color: #add8e6;
+ font-weight: bold;
+ background-color: #4d4d4d; }
+ .highlight .gp {
+ color: #ffffff; }
+ .highlight .gs {
+ color: #ffffff; }
+ .highlight .gu {
+ color: #cd5c5c; }
+ .highlight .gt {
+ color: #c0c0c0;
+ font-weight: bold;
+ background-color: #c00000; }
+ .highlight .kc {
+ color: #f0e68c; }
+ .highlight .kd {
+ color: #f0e68c; }
+ .highlight .kn {
+ color: #f0e68c; }
+ .highlight .kp {
+ color: #f0e68c; }
+ .highlight .kr {
+ color: #f0e68c; }
+ .highlight .kt {
+ color: #bdb76b; }
+ .highlight .ld {
+ color: #ffffff; }
+ .highlight .m {
+ color: #ffffff; }
+ .highlight .s {
+ color: #ffffff; }
+ .highlight .na {
+ color: #ffffff; }
+ .highlight .nb {
+ color: #ffffff; }
+ .highlight .nc {
+ color: #ffffff; }
+ .highlight .no {
+ color: #ffa0a0; }
+ .highlight .nd {
+ color: #ffffff; }
+ .highlight .ni {
+ color: #ffdead; }
+ .highlight .ne {
+ color: #ffffff; }
+ .highlight .nf {
+ color: #ffffff; }
+ .highlight .nl {
+ color: #ffffff; }
+ .highlight .nn {
+ color: #ffffff; }
+ .highlight .nx {
+ color: #ffffff; }
+ .highlight .py {
+ color: #ffffff; }
+ .highlight .nt {
+ color: #f0e68c; }
+ .highlight .nv {
+ color: #98fb98; }
+ .highlight .ow {
+ color: #ffffff; }
+ .highlight .w {
+ color: #ffffff; }
+ .highlight .mf {
+ color: #ffffff; }
+ .highlight .mh {
+ color: #ffffff; }
+ .highlight .mi {
+ color: #ffffff; }
+ .highlight .mo {
+ color: #ffffff; }
+ .highlight .sb {
+ color: #ffffff; }
+ .highlight .sc {
+ color: #ffffff; }
+ .highlight .sd {
+ color: #ffffff; }
+ .highlight .s2 {
+ color: #ffffff; }
+ .highlight .se {
+ color: #ffffff; }
+ .highlight .sh {
+ color: #ffffff; }
+ .highlight .si {
+ color: #ffffff; }
+ .highlight .sx {
+ color: #ffffff; }
+ .highlight .sr {
+ color: #ffffff; }
+ .highlight .s1 {
+ color: #ffffff; }
+ .highlight .ss {
+ color: #ffffff; }
+ .highlight .bp {
+ color: #ffffff; }
+ .highlight .vc {
+ color: #98fb98; }
+ .highlight .vg {
+ color: #98fb98; }
+ .highlight .vi {
+ color: #98fb98; }
+ .highlight .il {
+ color: #ffffff; }
+ .highlight .bash .nv {
+ -webkit-user-select: none;
+ -moz-user-select: none;
+ -ms-user-select: none;
+ -o-user-select: none;
+ user-select: none; }
+
+/*!
+ * Font Awesome 4.2.0 by @davegandy - http://fontawesome.io - @fontawesome
+ * License - http://fontawesome.io/license (Font: SIL OFL 1.1, CSS: MIT License)
+ */
+@font-face {
+ font-family: 'FontAwesome';
+ src: url("../fonts/fontawesome-webfont.eot?v=4.2.0");
+ src: url("../fonts/fontawesome-webfont.eot?#iefix&v=4.2.0") format("embedded-opentype"), url("../fonts/fontawesome-webfont.woff?v=4.2.0") format("woff"), url("../fonts/fontawesome-webfont.ttf?v=4.2.0") format("truetype"), url("../fonts/fontawesome-webfont.svg?v=4.2.0#fontawesomeregular") format("svg");
+ font-weight: normal;
+ font-style: normal; }
+.fa {
+ display: inline-block;
+ font: normal normal normal 14px/1 FontAwesome;
+ font-size: inherit;
+ text-rendering: auto;
+ -webkit-font-smoothing: antialiased;
+ -moz-osx-font-smoothing: grayscale; }
+
+.fa-link:before {
+ content: "\f0c1"; }
+
+.fa-pencil:before {
+ content: "\f040"; }
+
+/* Base */
+* {
+ -webkit-box-sizing: border-box;
+ -moz-box-sizing: border-box;
+ box-sizing: border-box; }
+
+body {
+ font: 300 21px Lato, 'Helvetica Neue', Helvetica, Arial, sans-serif;
+ color: #ddd;
+ background-color: #333;
+ border-top: 5px solid #70c84c;
+ -webkit-box-shadow: inset 0 3px 30px rgba(0, 0, 0, 0.3);
+ -moz-box-shadow: inset 0 3px 30px rgba(0, 0, 0, 0.3);
+ box-shadow: inset 0 3px 30px rgba(0, 0, 0, 0.3);
+ text-shadow: 0 1px 3px rgba(0, 0, 0, 0.5);
+ -webkit-font-feature-settings: "kern" 1;
+ -moz-font-feature-settings: "kern" 1;
+ -o-font-feature-settings: "kern" 1;
+ font-feature-settings: "kern" 1;
+ font-kerning: normal; }
+
+.clear {
+ display: block; }
+
+.clear:after {
+ content: " ";
+ display: block;
+ height: 0;
+ clear: both;
+ visibility: hidden; }
+
+/* Sections */
+header,
+section,
+footer {
+ float: left;
+ width: 100%;
+ clear: both; }
+
+/* Header */
+header h1,
+header nav {
+ display: inline-block; }
+
+nav ul {
+ padding: 0;
+ margin: 0; }
+nav li {
+ display: inline-block; }
+
+.main-nav {
+ margin-top: 52px; }
+ .main-nav li {
+ margin-right: 10px; }
+ .main-nav li a {
+ -webkit-border-radius: 5px;
+ -moz-border-radius: 5px;
+ border-radius: 5px;
+ font-weight: 900;
+ font-size: 14px;
+ padding: 0.5em 1em;
+ text-shadow: none;
+ text-transform: uppercase;
+ -webkit-transition: all 0.25s;
+ -moz-transition: all 0.25s;
+ -o-transition: all 0.25s;
+ transition: all 0.25s; }
+ .main-nav li a:hover {
+ background-color: #252525;
+ -webkit-box-shadow: inset 0 1px 3px rgba(0, 0, 0, 0.5), 0 1px 0 rgba(255, 255, 255, 0.1);
+ -moz-box-shadow: inset 0 1px 3px rgba(0, 0, 0, 0.5), 0 1px 0 rgba(255, 255, 255, 0.1);
+ box-shadow: inset 0 1px 3px rgba(0, 0, 0, 0.5), 0 1px 0 rgba(255, 255, 255, 0.1);
+ text-shadow: 0 1px 3px rgba(0, 0, 0, 0.5); }
+ .main-nav li.current a {
+ background-color: #70c84c;
+ color: #222;
+ -webkit-box-shadow: inset 0 1px 0 rgba(255, 255, 255, 0.5), 0 1px 5px rgba(0, 0, 0, 0.5);
+ -moz-box-shadow: inset 0 1px 0 rgba(255, 255, 255, 0.5), 0 1px 5px rgba(0, 0, 0, 0.5);
+ box-shadow: inset 0 1px 0 rgba(255, 255, 255, 0.5), 0 1px 5px rgba(0, 0, 0, 0.5);
+ text-shadow: 0 1px 0 rgba(255, 255, 255, 0.3); }
+
+.mobile-nav ul {
+ overflow: hidden;
+ width: 100%;
+ display: table; }
+.mobile-nav a {
+ float: left;
+ width: 100%;
+ background-color: #333;
+ color: #70c84c;
+ text-align: center;
+ text-transform: uppercase;
+ font-size: 14px;
+ font-weight: 900;
+ padding: 5px;
+ -webkit-border-radius: 5px;
+ -moz-border-radius: 5px;
+ border-radius: 5px; }
+.mobile-nav li {
+ display: table-cell;
+ width: 20%;
+ padding: 8px 2px; }
+.mobile-nav .current a {
+ background-color: #70c84c;
+ color: #222;
+ -webkit-box-shadow: inset 0 1px 0 rgba(255, 255, 255, 0.5), 0 1px 5px rgba(0, 0, 0, 0.5);
+ -moz-box-shadow: inset 0 1px 0 rgba(255, 255, 255, 0.5), 0 1px 5px rgba(0, 0, 0, 0.5);
+ box-shadow: inset 0 1px 0 rgba(255, 255, 255, 0.5), 0 1px 5px rgba(0, 0, 0, 0.5);
+ text-shadow: 0 1px 0 rgba(255, 255, 255, 0.3); }
+
+/*
+ * This code is courtesy Ben Balter, modified by Parker Moore.
+ * http://ben.balter.com/2014/03/13/pages-anchor-links/
+ */
+.header-link {
+ position: relative;
+ left: 0.5em;
+ opacity: 0;
+ font-size: 0.8em;
+ -webkit-transition: opacity 0.2s ease-in-out 0.1s;
+ -moz-transition: opacity 0.2s ease-in-out 0.1s;
+ -o-transition: opacity 0.2s ease-in-out 0.1s;
+ transition: opacity 0.2s ease-in-out 0.1s; }
+
+h2:hover .header-link,
+h3:hover .header-link,
+h4:hover .header-link,
+h5:hover .header-link,
+h6:hover .header-link {
+ opacity: 1; }
+
+@media (max-width: 768px) {
+ .main-nav ul {
+ text-align: right; } }
+@media (max-width: 830px) {
+ .main-nav .show-on-mobiles {
+ display: inline; }
+ .main-nav .hide-on-mobiles {
+ display: none; } }
+/* Footer */
+footer {
+ background-color: #212121;
+ font-size: 16px;
+ padding-bottom: 5px;
+ color: #c0c0c0;
+ margin-top: 40px; }
+ footer a {
+ color: #fff; }
+ footer a:hover img {
+ opacity: 1; }
+ footer .align-right p {
+ display: inline-block; }
+ footer img {
+ display: inline-block;
+ position: relative;
+ top: 8px;
+ margin-left: 5px;
+ opacity: .8;
+ padding: 1px;
+ -webkit-transition: opacity 0.2s;
+ -moz-transition: opacity 0.2s;
+ -o-transition: opacity 0.2s;
+ transition: opacity 0.2s; }
+
+@media (max-width: 568px) {
+ footer .one-third p {
+ margin-bottom: 0; }
+ footer .two-thirds p {
+ margin-top: -20px; } }
+/* Intro */
+.intro .unit {
+ padding: 10px 0 40px; }
+.intro p {
+ font-size: 1.75em;
+ line-height: 1em;
+ margin: 0; }
+
+@media (min-width: 569px) {
+ .intro p {
+ font-size: 3.2em; } }
+/* Quickstart */
+.quickstart {
+ background-color: #3F1F1F;
+ color: #fff;
+ margin: 60px 0;
+ -webkit-box-shadow: inset 0 3px 10px rgba(0, 0, 0, 0.4);
+ -moz-box-shadow: inset 0 3px 10px rgba(0, 0, 0, 0.4);
+ box-shadow: inset 0 3px 10px rgba(0, 0, 0, 0.4); }
+ .quickstart .content {
+ padding: 0; }
+ .quickstart h3 {
+ font-size: 24px;
+ line-height: 24px;
+ margin-top: 20px;
+ text-shadow: 0 1px 3px rgba(0, 0, 0, 0.8); }
+ .quickstart .code {
+ font-size: 12px;
+ display: block;
+ margin: 0 0 -30px; }
+
+@media (min-width: 768px) {
+ .quickstart .code {
+ font-size: 18px;
+ margin: -30px 0;
+ float: right; }
+ .quickstart h3 {
+ margin: 50px 0 0;
+ text-align: center; } }
+/* Code */
+.quickstart .code {
+ display: block;
+ padding: 0;
+ font-family: Menlo, Consolas, "Courier New", Courier, "Liberation Mono", monospace;
+ line-height: 1.3em; }
+ .quickstart .code .title {
+ display: block;
+ text-align: center;
+ margin: 0 20px;
+ padding: 5px 0;
+ -webkit-border-radius: 5px 5px 0 0;
+ -moz-border-radius: 5px 5px 0 0;
+ border-radius: 5px 5px 0 0;
+ -webkit-box-shadow: 0 3px 10px rgba(0, 0, 0, 0.5);
+ -moz-box-shadow: 0 3px 10px rgba(0, 0, 0, 0.5);
+ box-shadow: 0 3px 10px rgba(0, 0, 0, 0.5);
+ font: 400 16px/24px 'Helvetica Neue', Helvetica, Arial, sans-serif;
+ color: #444;
+ text-shadow: 0 1px 0 rgba(255, 255, 255, 0.5);
+ background-color: #f7f7f7;
+ background-image: url(data:image/svg+xml;base64,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);
+ background-image: -webkit-gradient(linear, left top, left bottom, from(#f7f7f7), color-stop(7%, #cfcfcf), to(#aaaaaa));
+ background-image: -webkit-linear-gradient(top, #f7f7f7 0%, #cfcfcf 7%, #aaaaaa 100%);
+ background-image: -moz-linear-gradient(top, #f7f7f7 0%, #cfcfcf 7%, #aaaaaa 100%);
+ background-image: -o-linear-gradient(top, #f7f7f7 0%, #cfcfcf 7%, #aaaaaa 100%);
+ background-image: linear-gradient(top, #f7f7f7 0%, #cfcfcf 7%, #aaaaaa 100%);
+ filter: progid:DXImageTransform.Microsoft.gradient( startColorstr='#f7f7f7', endColorstr='#aaaaaa',GradientType=0 );
+ border-bottom: 1px solid #111; }
+ .quickstart .code .shell {
+ padding: 20px;
+ text-shadow: none;
+ margin: 0 20px;
+ background-color: #171717;
+ -webkit-border-radius: 0 0 5px 5px;
+ -moz-border-radius: 0 0 5px 5px;
+ border-radius: 0 0 5px 5px;
+ -webkit-box-shadow: 0 5px 30px rgba(0, 0, 0, 0.3);
+ -moz-box-shadow: 0 5px 30px rgba(0, 0, 0, 0.3);
+ box-shadow: 0 5px 30px rgba(0, 0, 0, 0.3); }
+ .quickstart .code .line {
+ display: block;
+ margin: 0;
+ padding: 0; }
+ .quickstart .code .line span {
+ display: inline-block; }
+ .quickstart .code .path {
+ color: #87ceeb;
+ -webkit-user-select: none;
+ /* Chrome all / Safari all */
+ -moz-user-select: none;
+ /* Firefox all */
+ -ms-user-select: none;
+ /* IE 10+ */
+ -o-user-select: none;
+ user-select: none; }
+ .quickstart .code .prompt {
+ color: #cd5c5c;
+ -webkit-user-select: none;
+ /* Chrome all / Safari all */
+ -moz-user-select: none;
+ /* Firefox all */
+ -ms-user-select: none;
+ /* IE 10+ */
+ -o-user-select: none;
+ user-select: none; }
+ .quickstart .code .command {
+ color: #f0e68c; }
+ .quickstart .code .output {
+ color: #888; }
+
+@media (min-width: 768px) {
+ .free-hosting img {
+ float: left;
+ margin: -20px -30px -30px -50px;
+ width: 300px;
+ height: 251px; }
+ .free-hosting .pane-content {
+ margin-top: 35px;
+ padding-right: 30px; }
+ .free-hosting p,
+ .free-hosting a {
+ font-size: 18px; }
+ .free-hosting .pane:after {
+ content: " ";
+ float: right;
+ background: url(../img/footer-arrow.png) top left no-repeat;
+ width: 73px;
+ height: 186px;
+ position: absolute;
+ right: 0;
+ bottom: -30px; } }
+/* Article - Used for both docs and news */
+article {
+ background-color: #444;
+ -webkit-border-radius: 10px;
+ -moz-border-radius: 10px;
+ border-radius: 10px;
+ padding: 20px;
+ margin: 0 10px;
+ -webkit-box-shadow: 0 3px 10px rgba(0, 0, 0, 0.1);
+ -moz-box-shadow: 0 3px 10px rgba(0, 0, 0, 0.1);
+ box-shadow: 0 3px 10px rgba(0, 0, 0, 0.1);
+ font-size: 16px; }
+
+@media (max-width: 480px) {
+ article ul {
+ padding-left: 20px; } }
+@media (max-width: 568px) {
+ article {
+ margin: 0; } }
+@media (min-width: 768px) {
+ article {
+ padding: 40px 40px 30px;
+ font-size: 21px; } }
+/* Right-side nav - used by both docs and news */
+aside {
+ padding-top: 30px; }
+ aside h4 {
+ text-transform: uppercase;
+ font-size: 14px;
+ font-weight: 700;
+ padding: 0 0 10px 30px;
+ margin-left: -30px;
+ display: inline-block;
+ border-bottom: 1px solid #c00; }
+ aside ul {
+ padding-left: 0; }
+ aside ul:first-child {
+ margin-top: 0; }
+ aside li {
+ list-style-type: none; }
+ aside li a {
+ font-size: 16px;
+ position: relative; }
+ aside li.current a:before {
+ content: "";
+ border-color: transparent transparent transparent #444;
+ border-style: solid;
+ border-width: 10px;
+ width: 0;
+ height: 0;
+ position: absolute;
+ top: 0;
+ left: -30px; }
+
+/* Documentation */
+.docs article {
+ min-height: 800px; }
+.docs .content {
+ padding: 0; }
+
+.section-nav {
+ text-align: center;
+ padding-top: 40px;
+ position: relative;
+ background: url(../img/article-footer.png) top center no-repeat;
+ margin: 40px -20px 10px; }
+ .section-nav > div {
+ width: 49.5%; }
+ .section-nav a,
+ .section-nav span {
+ color: #fff;
+ font-size: 16px;
+ text-transform: uppercase;
+ font-weight: 700;
+ padding: 8px 12px 10px;
+ -webkit-border-radius: 5px;
+ -moz-border-radius: 5px;
+ border-radius: 5px;
+ /*border: 1px solid #333;*/
+ -webkit-box-shadow: 0 1px 3px rgba(0, 0, 0, 0.3), inset 0 1px 1px rgba(255, 255, 255, 0.5);
+ -moz-box-shadow: 0 1px 3px rgba(0, 0, 0, 0.3), inset 0 1px 1px rgba(255, 255, 255, 0.5);
+ box-shadow: 0 1px 3px rgba(0, 0, 0, 0.3), inset 0 1px 1px rgba(255, 255, 255, 0.5);
+ background-color: #767676; }
+ .section-nav a:hover {
+ color: #fff;
+ background-color: #888; }
+ .section-nav .next,
+ .section-nav .prev {
+ position: relative; }
+ .section-nav .next:after,
+ .section-nav .prev:before {
+ font-size: 36px;
+ color: #222;
+ font-weight: 900;
+ text-shadow: 0 1px 0 rgba(255, 255, 255, 0.4);
+ position: absolute;
+ top: -7px; }
+ .section-nav .next:after {
+ content: '\203A';
+ right: 10px; }
+ .section-nav .prev:before {
+ content: '\2039';
+ left: 10px; }
+ .section-nav .prev,
+ .section-nav .prev:hover {
+ padding-left: 30px; }
+ .section-nav .next,
+ .section-nav .next:hover {
+ padding-right: 30px; }
+ .section-nav .disabled {
+ opacity: .5;
+ cursor: default; }
+
+.improve {
+ padding-top: 25px;
+ font-size: 16px; }
+ .improve a {
+ color: #999; }
+
+.docs-nav-mobile select {
+ color: #000;
+ width: 100%; }
+
+/* News */
+article h2:first-child {
+ margin-top: 0; }
+
+.post-category,
+.post-meta {
+ display: inline-block;
+ vertical-align: middle;
+ font-size: .8em; }
+
+.post-category {
+ display: inline-block;
+ margin-left: -30px;
+ padding: 6px 10px 8px;
+ padding-left: 50px;
+ -webkit-border-radius: 0 5px 5px 0;
+ -moz-border-radius: 0 5px 5px 0;
+ border-radius: 0 5px 5px 0;
+ position: relative;
+ -webkit-box-shadow: 0 1px 5px rgba(0, 0, 0, 0.3), inset 0 1px 0 rgba(255, 255, 255, 0.2), inset 0 -1px 0 rgba(0, 0, 0, 0.3);
+ -moz-box-shadow: 0 1px 5px rgba(0, 0, 0, 0.3), inset 0 1px 0 rgba(255, 255, 255, 0.2), inset 0 -1px 0 rgba(0, 0, 0, 0.3);
+ box-shadow: 0 1px 5px rgba(0, 0, 0, 0.3), inset 0 1px 0 rgba(255, 255, 255, 0.2), inset 0 -1px 0 rgba(0, 0, 0, 0.3);
+ background-color: #9e2812;
+ background-image: url(data:image/svg+xml;base64,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);
+ background-image: -webkit-gradient(linear, left top, left bottom, from(#9e2812), to(#6f0d0d));
+ background-image: -webkit-linear-gradient(top, #9e2812 0%, #6f0d0d 100%);
+ background-image: -moz-linear-gradient(top, #9e2812 0%, #6f0d0d 100%);
+ background-image: -o-linear-gradient(top, #9e2812 0%, #6f0d0d 100%);
+ background-image: linear-gradient(to bottom, #9e2812 0%, #6f0d0d 100%);
+ filter: progid:DXImageTransform.Microsoft.gradient( startColorstr='#9e2812', endColorstr='#6f0d0d',GradientType=0 ); }
+ .post-category:before {
+ content: "";
+ position: absolute;
+ top: -10px;
+ left: 0;
+ border-color: transparent #6f0d0d #6f0d0d transparent;
+ border-style: solid;
+ border-width: 5px;
+ width: 0;
+ height: 0; }
+
+.post-content img {
+ max-width: 100%; }
+
+.label {
+ float: left;
+ text-transform: uppercase;
+ font-weight: 700;
+ text-shadow: 0 -1px 0 rgba(0, 0, 0, 0.5); }
+
+@media (max-width: 568px) {
+ .post-category {
+ padding-left: 30px; } }
+@media (min-width: 768px) {
+ .post-category {
+ margin-left: -50px; } }
+.avatar {
+ -webkit-border-radius: 3px;
+ -moz-border-radius: 3px;
+ border-radius: 3px;
+ display: inline-block;
+ vertical-align: middle; }
+
+.post-meta {
+ padding: 5px 0;
+ color: #c0c0c0;
+ font-weight: 600;
+ text-shadow: 0 -1px 0 #000; }
+
+.post-date,
+.post-author {
+ margin-left: 10px; }
+
+.news article + article {
+ margin-top: -10px;
+ -webkit-border-radius: 0 0 10px 10px;
+ -moz-border-radius: 0 0 10px 10px;
+ border-radius: 0 0 10px 10px;
+ border-top: 1px solid #555;
+ -webkit-box-shadow: 0 -1px 0 #2f2f2f;
+ -moz-box-shadow: 0 -1px 0 #2f2f2f;
+ box-shadow: 0 -1px 0 #2f2f2f; }
+
+/* Code Highlighting */
+pre,
+code {
+ white-space: pre;
+ display: inline-block;
+ margin: 0;
+ font: 14px/1.8em Menlo, Consolas, "Courier New", Courier, "Liberation Mono", monospace;
+ padding: 0 0.5em; }
+
+@media (min-width: 768px) {
+ pre, code {
+ font-size: 16px; } }
+.highlight,
+p > pre,
+p > code,
+p > nobr > code,
+li > code,
+h5 > code,
+.note > code {
+ background-color: #2b2b2b;
+ color: #fff;
+ -webkit-border-radius: 5px;
+ -moz-border-radius: 5px;
+ border-radius: 5px;
+ -webkit-box-shadow: inset 0 1px 10px rgba(0, 0, 0, 0.3), 0 1px 0 rgba(255, 255, 255, 0.1), 0 -1px 0 rgba(0, 0, 0, 0.5);
+ -moz-box-shadow: inset 0 1px 10px rgba(0, 0, 0, 0.3), 0 1px 0 rgba(255, 255, 255, 0.1), 0 -1px 0 rgba(0, 0, 0, 0.5);
+ box-shadow: inset 0 1px 10px rgba(0, 0, 0, 0.3), 0 1px 0 rgba(255, 255, 255, 0.1), 0 -1px 0 rgba(0, 0, 0, 0.5); }
+
+.note code {
+ background-color: #333;
+ background-color: rgba(0, 0, 0, 0.2);
+ margin-left: 2.5px;
+ margin-right: 2.5px;
+ font-size: 0.8em; }
+
+.highlight {
+ margin: 1em 0;
+ padding: 10px 0;
+ width: 100%;
+ overflow: auto; }
+
+/* HTML Elements */
+h1, h2, h3, h4, h5, h6 {
+ margin: 0; }
+
+a {
+ color: #70c84c;
+ text-decoration: none;
+ -webkit-transition: all 0.25s;
+ -moz-transition: all 0.25s;
+ -o-transition: all 0.25s;
+ transition: all 0.25s; }
+ a:hover {
+ color: #70c84c; }
+
+strong {
+ font-weight: 700; }
+
+p {
+ line-height: 1.5em; }
+
+.left {
+ float: left; }
+
+.right {
+ float: right; }
+
+.align-right {
+ text-align: right; }
+
+.align-left {
+ text-align: left; }
+
+.align-center {
+ text-align: center; }
+
+/* Article HTML */
+article h2, article h3, article h4, article h5, article h6 {
+ margin: 1em 0; }
+article h4 {
+ color: #fff; }
+article ul li p {
+ margin: 0; }
+article ul li blockquote {
+ margin: 10px 0; }
+article ul li,
+article ol li {
+ line-height: 1.5em;
+ margin-bottom: 0.5em; }
+
+h5, h6 {
+ font-size: 1em;
+ font-style: italic; }
+
+blockquote {
+ border-left: 2px solid #777;
+ padding-left: 20px;
+ font-style: italic;
+ font-size: 18px;
+ font-weight: 500; }
+
+/* Tables */
+table {
+ width: 100%;
+ background-color: #555;
+ margin: .5em 0;
+ -webkit-border-radius: 5px;
+ -moz-border-radius: 5px;
+ border-radius: 5px;
+ -webkit-box-shadow: 0 1px 3px rgba(0, 0, 0, 0.3);
+ -moz-box-shadow: 0 1px 3px rgba(0, 0, 0, 0.3);
+ box-shadow: 0 1px 3px rgba(0, 0, 0, 0.3); }
+
+thead {
+ -webkit-border-top-left-radius: 5px;
+ -moz-border-radius-topleft: 5px;
+ border-top-left-radius: 5px;
+ -webkit-border-top-right-radius: 5px;
+ -moz-border-radius-topright: 5px;
+ border-top-right-radius: 5px;
+ color: #fff;
+ background-color: #3a3a3a;
+ background-image: url(data:image/svg+xml;base64,PD94bWwgdmVyc2lvbj0iMS4wIiA/Pgo8c3ZnIHhtbG5zPSJodHRwOi8vd3d3LnczLm9yZy8yMDAwL3N2ZyIgd2lkdGg9IjEwMCUiIGhlaWdodD0iMTAwJSIgdmlld0JveD0iMCAwIDEgMSIgcHJlc2VydmVBc3BlY3RSYXRpbz0ibm9uZSI+CiAgPGxpbmVhckdyYWRpZW50IGlkPSJncmFkLXVjZ2ctZ2VuZXJhdGVkIiBncmFkaWVudFVuaXRzPSJ1c2VyU3BhY2VPblVzZSIgeDE9IjAlIiB5MT0iMCUiIHgyPSIwJSIgeTI9IjEwMCUiPgogICAgPHN0b3Agb2Zmc2V0PSIwJSIgc3RvcC1jb2xvcj0iIzNhM2EzYSIgc3RvcC1vcGFjaXR5PSIxIi8+CiAgICA8c3RvcCBvZmZzZXQ9IjEwMCUiIHN0b3AtY29sb3I9IiMxZTFlMWUiIHN0b3Atb3BhY2l0eT0iMSIvPgogIDwvbGluZWFyR3JhZGllbnQ+CiAgPHJlY3QgeD0iMCIgeT0iMCIgd2lkdGg9IjEiIGhlaWdodD0iMSIgZmlsbD0idXJsKCNncmFkLXVjZ2ctZ2VuZXJhdGVkKSIgLz4KPC9zdmc+);
+ background-image: -webkit-gradient(linear, left top, left bottom, from(#3a3a3a), to(#1e1e1e));
+ background-image: -webkit-linear-gradient(top, #3a3a3a 0%, #1e1e1e 100%);
+ background-image: -moz-linear-gradient(top, #3a3a3a 0%, #1e1e1e 100%);
+ background-image: -o-linear-gradient(top, #3a3a3a 0%, #1e1e1e 100%);
+ background-image: linear-gradient(to bottom, #3a3a3a 0%, #1e1e1e 100%);
+ filter: progid:DXImageTransform.Microsoft.gradient( startColorstr='#3a3a3a', endColorstr='#1e1e1e',GradientType=0 ); }
+ thead th {
+ position: relative;
+ -webkit-box-shadow: inset 0 1px 0 rgba(255, 255, 255, 0.1);
+ -moz-box-shadow: inset 0 1px 0 rgba(255, 255, 255, 0.1);
+ box-shadow: inset 0 1px 0 rgba(255, 255, 255, 0.1); }
+ thead th:first-child {
+ -webkit-border-top-left-radius: 5px;
+ -moz-border-radius-topleft: 5px;
+ border-top-left-radius: 5px; }
+ thead th:last-child {
+ -webkit-border-top-right-radius: 5px;
+ -moz-border-radius-topright: 5px;
+ border-top-right-radius: 5px; }
+
+td {
+ padding: .5em .75em; }
+
+td p {
+ margin: 0; }
+
+th {
+ text-transform: uppercase;
+ font-size: 16px;
+ padding: .5em .75em;
+ text-shadow: 0 -1px 0 rgba(0, 0, 0, 0.9);
+ color: #888; }
+
+tbody td {
+ border-top: 1px solid #747474;
+ border-top: 1px solid rgba(0, 0, 0, 0.1);
+ -webkit-box-shadow: inset 0 1px 0 rgba(255, 255, 255, 0.1);
+ -moz-box-shadow: inset 0 1px 0 rgba(255, 255, 255, 0.1);
+ box-shadow: inset 0 1px 0 rgba(255, 255, 255, 0.1);
+ background: url(data:image/svg+xml;base64,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);
+ background-image: -webkit-gradient(linear, left top, left bottom, from(rgba(255, 255, 255, 0.1)), to(rgba(255, 255, 255, 0)));
+ background-image: -webkit-linear-gradient(top, rgba(255, 255, 255, 0.1) 0%, rgba(255, 255, 255, 0) 100%);
+ background-image: -moz-linear-gradient(top, rgba(255, 255, 255, 0.1) 0%, rgba(255, 255, 255, 0) 100%);
+ background-image: -o-linear-gradient(top, rgba(255, 255, 255, 0.1) 0%, rgba(255, 255, 255, 0) 100%);
+ background-image: linear-gradient(to bottom, rgba(255, 255, 255, 0.1) 0%, rgba(255, 255, 255, 0) 100%);
+ filter: progid:DXImageTransform.Microsoft.gradient( startColorstr='#1affffff', endColorstr='#00ffffff',GradientType=0 ); }
+ tbody td p {
+ font-size: 16px; }
+ tbody td p code {
+ font-size: 14px; }
+
+code.option,
+th .option,
+code.filter,
+th .filter {
+ color: #50B600; }
+
+code.flag,
+th .flag,
+code.output,
+th .output {
+ color: #049DCE; }
+
+code.option,
+code.flag,
+code.filter,
+code.output {
+ margin-bottom: 2px; }
+
+/* Note types */
+.note {
+ margin: 30px 0;
+ margin-left: -30px;
+ padding: 20px 20px 24px;
+ padding-left: 50px;
+ -webkit-border-radius: 0 5px 5px 0;
+ -moz-border-radius: 0 5px 5px 0;
+ border-radius: 0 5px 5px 0;
+ position: relative;
+ -webkit-box-shadow: 0 1px 5px rgba(0, 0, 0, 0.3), inset 0 1px 0 rgba(255, 255, 255, 0.2), inset 0 -1px 0 rgba(0, 0, 0, 0.3);
+ -moz-box-shadow: 0 1px 5px rgba(0, 0, 0, 0.3), inset 0 1px 0 rgba(255, 255, 255, 0.2), inset 0 -1px 0 rgba(0, 0, 0, 0.3);
+ box-shadow: 0 1px 5px rgba(0, 0, 0, 0.3), inset 0 1px 0 rgba(255, 255, 255, 0.2), inset 0 -1px 0 rgba(0, 0, 0, 0.3);
+ background-color: #7e6d42;
+ background-image: url(data:image/svg+xml;base64,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);
+ background-image: -webkit-gradient(linear, left top, left bottom, from(#7e6d42), to(#5c4e35));
+ background-image: -webkit-linear-gradient(top, #7e6d42 0%, #5c4e35 100%);
+ background-image: -moz-linear-gradient(top, #7e6d42 0%, #5c4e35 100%);
+ background-image: -o-linear-gradient(top, #7e6d42 0%, #5c4e35 100%);
+ background-image: linear-gradient(to bottom, #7e6d42 0%, #5c4e35 100%);
+ filter: progid:DXImageTransform.Microsoft.gradient( startColorstr='#7e6d42', endColorstr='#5c4e35',GradientType=0 ); }
+
+@media (max-width: 568px) {
+ .note {
+ margin-right: -30px; } }
+@media (min-width: 768px) {
+ .note {
+ margin-left: -50px; } }
+.configtable {
+ font-size: 14px; }
+
+.note:before {
+ content: "";
+ position: absolute;
+ top: -10px;
+ left: 0;
+ border-color: transparent #222 #222 transparent;
+ border-style: solid;
+ border-width: 5px;
+ width: 0;
+ height: 0; }
+.note h5,
+.note p {
+ margin: 0;
+ color: #fff; }
+.note h5 {
+ line-height: 1.5em;
+ font-weight: 900;
+ font-style: normal; }
+.note p {
+ font-weight: 400;
+ font-size: .75em; }
+.note:after {
+ content: '\2605';
+ color: #70c84c;
+ position: absolute;
+ top: 14px;
+ left: 14px;
+ font-size: 28px;
+ font-weight: 700;
+ text-shadow: 0 -1px 0 rgba(0, 0, 0, 0.5); }
+
+.info {
+ background-color: #0389aa;
+ background-image: url(data:image/svg+xml;base64,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);
+ background-image: -webkit-gradient(linear, left top, left bottom, from(#0389aa), to(#00617f));
+ background-image: -webkit-linear-gradient(top, #0389aa 0%, #00617f 100%);
+ background-image: -moz-linear-gradient(top, #0389aa 0%, #00617f 100%);
+ background-image: -o-linear-gradient(top, #0389aa 0%, #00617f 100%);
+ background-image: linear-gradient(to bottom, #0389aa 0%, #00617f 100%);
+ filter: progid:DXImageTransform.Microsoft.gradient( startColorstr='#0389aa', endColorstr='#00617f',GradientType=0 ); }
+
+.warning {
+ background-color: #9e2812;
+ background-image: url(data:image/svg+xml;base64,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);
+ background-image: -webkit-gradient(linear, left top, left bottom, from(#9e2812), to(#6f0d0d));
+ background-image: -webkit-linear-gradient(top, #9e2812 0%, #6f0d0d 100%);
+ background-image: -moz-linear-gradient(top, #9e2812 0%, #6f0d0d 100%);
+ background-image: -o-linear-gradient(top, #9e2812 0%, #6f0d0d 100%);
+ background-image: linear-gradient(to bottom, #9e2812 0%, #6f0d0d 100%);
+ filter: progid:DXImageTransform.Microsoft.gradient( startColorstr='#9e2812', endColorstr='#6f0d0d',GradientType=0 ); }
+
+.unreleased {
+ background-color: #cd9239;
+ background-image: url(data:image/svg+xml;base64,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);
+ background-image: -webkit-gradient(linear, left top, left bottom, from(#cd9239), to(#a27528));
+ background-image: -webkit-linear-gradient(top, #cd9239 0%, #a27528 100%);
+ background-image: -moz-linear-gradient(top, #cd9239 0%, #a27528 100%);
+ background-image: -o-linear-gradient(top, #cd9239 0%, #a27528 100%);
+ background-image: linear-gradient(to bottom, #cd9239 0%, #a27528 100%);
+ filter: progid:DXImageTransform.Microsoft.gradient( startColorstr='#cd9239', endColorstr='#a27528',GradientType=0 ); }
+
+.info:before {
+ border-color: transparent #00617f #00617f transparent; }
+
+.warning:before {
+ border-color: transparent #6f0d0d #6f0d0d transparent; }
+
+.unreleased:before {
+ border-color: transparent #664719 #664719 transparent; }
+
+.info:after {
+ content: '\24D8';
+ color: #fff;
+ position: absolute;
+ top: 15px;
+ left: 15px;
+ font-size: 28px;
+ font-weight: 700;
+ text-shadow: 0 -1px 0 rgba(0, 0, 0, 0.5); }
+
+.warning:after {
+ content: '\203C';
+ color: #70c84c;
+ position: absolute;
+ top: 15px;
+ left: 15px;
+ font-size: 32px;
+ font-weight: 700;
+ text-shadow: 0 -1px 0 rgba(0, 0, 0, 0.5); }
+
+.unreleased:after {
+ content: '\2692';
+ color: #2b2a12;
+ position: absolute;
+ top: 8px;
+ left: 15px;
+ font-size: 38px;
+ font-weight: 700;
+ text-shadow: 0 1px 0 rgba(255, 255, 255, 0.25); }
+
+/* Responsive tables */
+@media (max-width: 768px) {
+ .mobile-side-scroller {
+ overflow-x: scroll;
+ margin: 0 -40px;
+ padding: 0 10px; } }
+.show-on-mobiles {
+ display: none; }
+
+@media screen and (max-width: 568px) {
+ .show-on-mobiles {
+ display: block !important; }
+
+ a .show-on-mobiles {
+ display: inline !important; } }
+/* Helper class taken from Bootstrap.
+ Hides an element to all devices except screen readers.
+*/
+.sr-only {
+ position: absolute;
+ width: 1px;
+ height: 1px;
+ padding: 0;
+ margin: -1px;
+ overflow: hidden;
+ clip: rect(0, 0, 0, 0);
+ border: 0; }
http://git-wip-us.apache.org/repos/asf/orc/blob/6a400548/develop/coding.html
----------------------------------------------------------------------
diff --git a/develop/coding.html b/develop/coding.html
new file mode 100644
index 0000000..5efe34c
--- /dev/null
+++ b/develop/coding.html
@@ -0,0 +1,184 @@
+<!DOCTYPE HTML>
+<html lang="en-US">
+<head>
+ <meta charset="UTF-8">
+ <title>Coding Guidelines</title>
+ <meta name="viewport" content="width=device-width,initial-scale=1">
+ <meta name="generator" content="Jekyll v2.4.0">
+ <link rel="stylesheet" href="//fonts.googleapis.com/css?family=Lato:300,300italic,400,400italic,700,700italic,900">
+ <link rel="stylesheet" href="/css/screen.css">
+ <link rel="icon" type="image/x-icon" href="/favicon.ico">
+ <!--[if lt IE 9]>
+ <script src="/js/html5shiv.min.js"></script>
+ <script src="/js/respond.min.js"></script>
+ <![endif]-->
+</head>
+
+
+<body class="wrap">
+ <header role="banner">
+ <nav class="mobile-nav show-on-mobiles">
+ <ul>
+ <li class="">
+ <a href="/">Home</a>
+ </li>
+ <li class="">
+ <a href="/docs/">Documentation</a>
+ </li>
+ <li class="">
+ <a href="/talks/">Talks</a>
+ </li>
+ <li class="">
+ <a href="/news/">News</a>
+ </li>
+ <li class="">
+ <a href="/help/">Help</a>
+ </li>
+ <li class="current">
+ <a href="/develop/">Develop</a>
+ </li>
+</ul>
+
+ </nav>
+ <div class="grid">
+ <div class="unit one-third center-on-mobiles">
+ <h1>
+ <a href="/">
+ <span class="sr-only">Apache ORC</span>
+ <img src="/img/logo.png" width="249" height="115" alt="ORC Logo">
+ </a>
+ </h1>
+ </div>
+ <nav class="main-nav unit two-thirds hide-on-mobiles">
+ <ul>
+ <li class="">
+ <a href="/">Home</a>
+ </li>
+ <li class="">
+ <a href="/docs/">Documentation</a>
+ </li>
+ <li class="">
+ <a href="/talks/">Talks</a>
+ </li>
+ <li class="">
+ <a href="/news/">News</a>
+ </li>
+ <li class="">
+ <a href="/help/">Help</a>
+ </li>
+ <li class="current">
+ <a href="/develop/">Develop</a>
+ </li>
+</ul>
+
+ </nav>
+ </div>
+</header>
+
+
+ <section class="standalone">
+ <div class="grid">
+
+ <div class="unit whole">
+ <article>
+ <h1>Coding Guidelines</h1>
+ <h2 id="general-rules">General rules</h2>
+
+<ul>
+ <li>All files must have an Apache copyright header at the top of the file.</li>
+ <li>Code should be removed rather than commented out.</li>
+ <li>All public functions should have javadoc comments.</li>
+ <li>Always use braces to surround branches.</li>
+ <li>try-finally should be avoided.</li>
+</ul>
+
+<h2 id="formatting">Formatting</h2>
+
+<ul>
+ <li>All files must have an 80 character maximum line length.</li>
+ <li>Indentation should be 2 spaces.</li>
+ <li>Files should use spaces instead of tabs.</li>
+ <li>Wrapping lines
+ <ul>
+ <li>Break after a comma.</li>
+ <li>Break before an operator.</li>
+ <li>Prefer higher-level breaks to lower-level breaks.</li>
+ <li>Align the new line with beginning of the expression at the same level
+on the previous line.</li>
+ <li>If the above rules lead to confusing code, just indent 8 spaces.</li>
+ </ul>
+ </li>
+ <li>One variable declaration per a line.</li>
+</ul>
+
+<h2 id="naming">Naming</h2>
+
+<ul>
+ <li>Packages should be all lowercase.
+ <ul>
+ <li>C++ code should be in <code>orc::</code>.</li>
+ <li>Java code should be in <code>org.apache.orc</code>, except for compatibility classes,
+which should be in <code>org.apache.hadoop.hive.ql.io.orc</code>.</li>
+ </ul>
+ </li>
+ <li>Classes should be in mixed case.</li>
+ <li>Variables should be in camel case.</li>
+ <li>Constants should be in upper case.</li>
+</ul>
+
+
+ </article>
+ </div>
+
+ <div class="clear"></div>
+
+ </div>
+</section>
+
+
+ <footer role="contentinfo">
+ <p>The contents of this website are © 2015
+ <a href="https://www.apache.org/">Apache Software Foundation</a>
+ under the terms of the <a
+ href="https://www.apache.org/licenses/LICENSE-2.0.html">
+ Apache License v2</a>. Apache ORC and its logo are trademarks
+ of the Apache Software Foundation.</p>
+</footer>
+
+ <script>
+ var anchorForId = function (id) {
+ var anchor = document.createElement("a");
+ anchor.className = "header-link";
+ anchor.href = "#" + id;
+ anchor.innerHTML = "<span class=\"sr-only\">Permalink</span><i class=\"fa fa-link\"></i>";
+ anchor.title = "Permalink";
+ return anchor;
+ };
+
+ var linkifyAnchors = function (level, containingElement) {
+ var headers = containingElement.getElementsByTagName("h" + level);
+ for (var h = 0; h < headers.length; h++) {
+ var header = headers[h];
+
+ if (typeof header.id !== "undefined" && header.id !== "") {
+ header.appendChild(anchorForId(header.id));
+ }
+ }
+ };
+
+ document.onreadystatechange = function () {
+ if (this.readyState === "complete") {
+ var contentBlock = document.getElementsByClassName("docs")[0] || document.getElementsByClassName("news")[0];
+ if (!contentBlock) {
+ return;
+ }
+ for (var level = 1; level <= 6; level++) {
+ linkifyAnchors(level, contentBlock);
+ }
+ }
+ };
+</script>
+
+
+</body>
+</html>
http://git-wip-us.apache.org/repos/asf/orc/blob/6a400548/develop/index.html
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diff --git a/develop/index.html b/develop/index.html
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--- /dev/null
+++ b/develop/index.html
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+<!DOCTYPE HTML>
+<html lang="en-US">
+<head>
+ <meta charset="UTF-8">
+ <title>Developing</title>
+ <meta name="viewport" content="width=device-width,initial-scale=1">
+ <meta name="generator" content="Jekyll v2.4.0">
+ <link rel="stylesheet" href="//fonts.googleapis.com/css?family=Lato:300,300italic,400,400italic,700,700italic,900">
+ <link rel="stylesheet" href="/css/screen.css">
+ <link rel="icon" type="image/x-icon" href="/favicon.ico">
+ <!--[if lt IE 9]>
+ <script src="/js/html5shiv.min.js"></script>
+ <script src="/js/respond.min.js"></script>
+ <![endif]-->
+</head>
+
+
+<body class="wrap">
+ <header role="banner">
+ <nav class="mobile-nav show-on-mobiles">
+ <ul>
+ <li class="">
+ <a href="/">Home</a>
+ </li>
+ <li class="">
+ <a href="/docs/">Documentation</a>
+ </li>
+ <li class="">
+ <a href="/talks/">Talks</a>
+ </li>
+ <li class="">
+ <a href="/news/">News</a>
+ </li>
+ <li class="">
+ <a href="/help/">Help</a>
+ </li>
+ <li class="current">
+ <a href="/develop/">Develop</a>
+ </li>
+</ul>
+
+ </nav>
+ <div class="grid">
+ <div class="unit one-third center-on-mobiles">
+ <h1>
+ <a href="/">
+ <span class="sr-only">Apache ORC</span>
+ <img src="/img/logo.png" width="249" height="115" alt="ORC Logo">
+ </a>
+ </h1>
+ </div>
+ <nav class="main-nav unit two-thirds hide-on-mobiles">
+ <ul>
+ <li class="">
+ <a href="/">Home</a>
+ </li>
+ <li class="">
+ <a href="/docs/">Documentation</a>
+ </li>
+ <li class="">
+ <a href="/talks/">Talks</a>
+ </li>
+ <li class="">
+ <a href="/news/">News</a>
+ </li>
+ <li class="">
+ <a href="/help/">Help</a>
+ </li>
+ <li class="current">
+ <a href="/develop/">Develop</a>
+ </li>
+</ul>
+
+ </nav>
+ </div>
+</header>
+
+
+ <section class="standalone">
+ <div class="grid">
+
+ <div class="unit whole">
+ <article>
+ <h1>Developing</h1>
+ <p>Want to help add a feature or fix a bug?</p>
+
+<h2 id="project-members">Project Members</h2>
+
+<table>
+ <thead>
+ <tr>
+ <th style="text-align: left">Name</th>
+ <th style="text-align: left">Apache Id</th>
+ <th style="text-align: left">Role</th>
+ </tr>
+ </thead>
+ <tbody>
+ <tr>
+ <td style="text-align: left">Chris Douglas</td>
+ <td style="text-align: left">cdouglas</td>
+ <td style="text-align: left">PMC</td>
+ </tr>
+ <tr>
+ <td style="text-align: left">Alan Gates</td>
+ <td style="text-align: left">gates</td>
+ <td style="text-align: left">PMC</td>
+ </tr>
+ <tr>
+ <td style="text-align: left">Gunther Hagleitner</td>
+ <td style="text-align: left">gunther</td>
+ <td style="text-align: left">Committer</td>
+ </tr>
+ <tr>
+ <td style="text-align: left">Prasanth Jayachandran</td>
+ <td style="text-align: left">prasanthj</td>
+ <td style="text-align: left">PMC</td>
+ </tr>
+ <tr>
+ <td style="text-align: left">Lefty Leverenz</td>
+ <td style="text-align: left">leftyl</td>
+ <td style="text-align: left">PMC</td>
+ </tr>
+ <tr>
+ <td style="text-align: left">Owen O’Malley</td>
+ <td style="text-align: left">omalley</td>
+ <td style="text-align: left">PMC</td>
+ </tr>
+ <tr>
+ <td style="text-align: left">Aliaksei Sandryhaila</td>
+ <td style="text-align: left">?</td>
+ <td style="text-align: left">Committer</td>
+ </tr>
+ <tr>
+ <td style="text-align: left">Sergey Shelukhin</td>
+ <td style="text-align: left">sershe</td>
+ <td style="text-align: left">Committer</td>
+ </tr>
+ <tr>
+ <td style="text-align: left">Gopal Vijayaraghavan</td>
+ <td style="text-align: left">gopalv</td>
+ <td style="text-align: left">Committer</td>
+ </tr>
+ <tr>
+ <td style="text-align: left">Stephen Walkauskas</td>
+ <td style="text-align: left">?</td>
+ <td style="text-align: left">Committer</td>
+ </tr>
+ <tr>
+ <td style="text-align: left">Kevin Wilfong</td>
+ <td style="text-align: left">kevinwilfong</td>
+ <td style="text-align: left">Committer</td>
+ </tr>
+ <tr>
+ <td style="text-align: left">Xuefu Zhang</td>
+ <td style="text-align: left">xuefu</td>
+ <td style="text-align: left">Committer</td>
+ </tr>
+ </tbody>
+</table>
+
+<h2 id="mailing-lists">Mailing Lists</h2>
+
+<p>There are several development mailing lists for ORC:</p>
+
+<ul>
+ <li><a href="mailto:dev@orc.apache.org">dev@orc.apache.org</a> - Development discussions
+with archive <a href="https://mail-archives.apache.org/mod_mbox/orc-dev/">here</a></li>
+ <li><a href="mailto:issues@orc.apache.org">issues@orc.apache.org</a> - Bug tracking
+with archive <a href="https://mail-archives.apache.org/mod_mbox/orc-issues/">here</a></li>
+ <li><a href="mailto:commits@orc.apache.org">commits@orc.apache.org</a> - Git tracking
+with archive <a href="https://mail-archives.apache.org/mod_mbox/orc-commits/">here</a></li>
+</ul>
+
+<p>You can subscribe to the lists by sending email to
+<em>list</em>-subscribe@orc.apache.org and unsubscribe by sending email to
+<em>list</em>-unsubscribe@orc.apache.org.</p>
+
+<h2 id="source-code">Source code</h2>
+
+<p>ORC uses git for version control. Get the source code:</p>
+
+<p><code>% git clone https://git-wip-us.apache.org/repos/asf/orc.git</code></p>
+
+<p>The important branches are:</p>
+
+<ul>
+ <li>master - The trunk for all developement</li>
+ <li>asf-site - The pages that are deployed to https://orc.apache.org/</li>
+</ul>
+
+<p>Please check our <a href="/develop/coding.html">coding guidelines</a>.</p>
+
+<h2 id="reviews">Reviews</h2>
+
+<p>All code must be +1’ed by a committer other than the author prior to its
+commit.</p>
+
+ </article>
+ </div>
+
+ <div class="clear"></div>
+
+ </div>
+</section>
+
+
+ <footer role="contentinfo">
+ <p>The contents of this website are © 2015
+ <a href="https://www.apache.org/">Apache Software Foundation</a>
+ under the terms of the <a
+ href="https://www.apache.org/licenses/LICENSE-2.0.html">
+ Apache License v2</a>. Apache ORC and its logo are trademarks
+ of the Apache Software Foundation.</p>
+</footer>
+
+ <script>
+ var anchorForId = function (id) {
+ var anchor = document.createElement("a");
+ anchor.className = "header-link";
+ anchor.href = "#" + id;
+ anchor.innerHTML = "<span class=\"sr-only\">Permalink</span><i class=\"fa fa-link\"></i>";
+ anchor.title = "Permalink";
+ return anchor;
+ };
+
+ var linkifyAnchors = function (level, containingElement) {
+ var headers = containingElement.getElementsByTagName("h" + level);
+ for (var h = 0; h < headers.length; h++) {
+ var header = headers[h];
+
+ if (typeof header.id !== "undefined" && header.id !== "") {
+ header.appendChild(anchorForId(header.id));
+ }
+ }
+ };
+
+ document.onreadystatechange = function () {
+ if (this.readyState === "complete") {
+ var contentBlock = document.getElementsByClassName("docs")[0] || document.getElementsByClassName("news")[0];
+ if (!contentBlock) {
+ return;
+ }
+ for (var level = 1; level <= 6; level++) {
+ linkifyAnchors(level, contentBlock);
+ }
+ }
+ };
+</script>
+
+
+</body>
+</html>
http://git-wip-us.apache.org/repos/asf/orc/blob/6a400548/doap_orc.rdf
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diff --git a/doap_orc.rdf b/doap_orc.rdf
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+<?xml version="1.0"?>
+<?xml-stylesheet type="text/xsl"?>
+<rdf:RDF xml:lang="en"
+ xmlns="http://usefulinc.com/ns/doap#"
+ xmlns:rdf="http://www.w3.org/1999/02/22-rdf-syntax-ns#"
+ xmlns:asfext="http://projects.apache.org/ns/asfext#"
+ xmlns:foaf="http://xmlns.com/foaf/0.1/">
+<!--
+ Licensed to the Apache Software Foundation (ASF) under one or more
+ contributor license agreements. See the NOTICE file distributed with
+ this work for additional information regarding copyright ownership.
+ The ASF licenses this file to You under the Apache License, Version 2.0
+ (the "License"); you may not use this file except in compliance with
+ the License. You may obtain a copy of the License at
+
+ http://www.apache.org/licenses/LICENSE-2.0
+
+ Unless required by applicable law or agreed to in writing, software
+ distributed under the License is distributed on an "AS IS" BASIS,
+ WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ See the License for the specific language governing permissions and
+ limitations under the License.
+-->
+ <Project rdf:about="https://orc.apache.org">
+ <created>2015-05-12</created>
+ <license rdf:resource="http://spdx.org/licenses/Apache-2.0" />
+ <name>Apache Orc</name>
+ <homepage rdf:resource="https://orc.apache.org" />
+ <asfext:pmc rdf:resource="https://orc.apache.org" />
+ <shortdesc>A high-performance columnar file format for Hadoop workloads.</shortdesc>
+ <description>ORC is a self-describing type-aware columnar file format designed for
+Hadoop workloads. It is optimized for large streaming reads, but with
+integrated support for finding required rows quickly. Storing data in
+a columnar format lets the reader read, decompress, and process only
+the values that are required for the current query.</description>
+ <bug-database rdf:resource="https://issues.apache.org/jira/browse/orc" />
+ <mailing-list rdf:resource="https://orc.apache.org/develop" />
+ <download-page rdf:resource="https://orc.apache.org/downloads" />
+ <programming-language>Java</programming-language>
+ <programming-language>C++</programming-language>
+ <category rdf:resource="http://projects.apache.org/category/big-data" />
+ <repository>
+ <GitRepository>
+ <location rdf:resource="https://git-wip-us.apache.org/repos/asf/orc.git"/>
+ <browse rdf:resource="https://github.com/apache/orc"/>
+ </GitRepository>
+ </repository>
+ <maintainer>
+ <foaf:Person>
+ <foaf:name>Owen O'Malley</foaf:name>
+ <foaf:mbox rdf:resource="mailto:omalley@apache.org"/>
+ </foaf:Person>
+ </maintainer>
+ </Project>
+</rdf:RDF>
http://git-wip-us.apache.org/repos/asf/orc/blob/6a400548/docs/acid.html
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+<!DOCTYPE HTML>
+<html lang="en-US">
+<head>
+ <meta charset="UTF-8">
+ <title>ACID support</title>
+ <meta name="viewport" content="width=device-width,initial-scale=1">
+ <meta name="generator" content="Jekyll v2.4.0">
+ <link rel="stylesheet" href="//fonts.googleapis.com/css?family=Lato:300,300italic,400,400italic,700,700italic,900">
+ <link rel="stylesheet" href="/css/screen.css">
+ <link rel="icon" type="image/x-icon" href="/favicon.ico">
+ <!--[if lt IE 9]>
+ <script src="/js/html5shiv.min.js"></script>
+ <script src="/js/respond.min.js"></script>
+ <![endif]-->
+</head>
+
+
+<body class="wrap">
+ <header role="banner">
+ <nav class="mobile-nav show-on-mobiles">
+ <ul>
+ <li class="">
+ <a href="/">Home</a>
+ </li>
+ <li class="current">
+ <a href="/docs/">Documentation</a>
+ </li>
+ <li class="">
+ <a href="/talks/">Talks</a>
+ </li>
+ <li class="">
+ <a href="/news/">News</a>
+ </li>
+ <li class="">
+ <a href="/help/">Help</a>
+ </li>
+ <li class="">
+ <a href="/develop/">Develop</a>
+ </li>
+</ul>
+
+ </nav>
+ <div class="grid">
+ <div class="unit one-third center-on-mobiles">
+ <h1>
+ <a href="/">
+ <span class="sr-only">Apache ORC</span>
+ <img src="/img/logo.png" width="249" height="115" alt="ORC Logo">
+ </a>
+ </h1>
+ </div>
+ <nav class="main-nav unit two-thirds hide-on-mobiles">
+ <ul>
+ <li class="">
+ <a href="/">Home</a>
+ </li>
+ <li class="current">
+ <a href="/docs/">Documentation</a>
+ </li>
+ <li class="">
+ <a href="/talks/">Talks</a>
+ </li>
+ <li class="">
+ <a href="/news/">News</a>
+ </li>
+ <li class="">
+ <a href="/help/">Help</a>
+ </li>
+ <li class="">
+ <a href="/develop/">Develop</a>
+ </li>
+</ul>
+
+ </nav>
+ </div>
+</header>
+
+
+ <section class="docs">
+ <div class="grid">
+
+ <div class="docs-nav-mobile unit whole show-on-mobiles">
+ <select onchange="if (this.value) window.location.href=this.value">
+ <option value="">Navigate the docs…</option>
+
+ <optgroup label="Overview">
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+ <option value="/docs/index.html">Background</option>
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+ <option value="/docs/types.html">Types</option>
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+ <option value="/docs/indexes.html">Indexes</option>
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+ <option value="/docs/acid.html">ACID support</option>
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+ </optgroup>
+
+ <optgroup label="Hive Usage">
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+ <option value="/docs/hive-ddl.html">Hive DDL</option>
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+ <option value="/docs/hive-config.html">Hive Configuration</option>
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+ </optgroup>
+
+ <optgroup label="Format Specification">
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+ <option value="/docs/spec-intro.html">Introduction</option>
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+ <option value="/docs/file-tail.html">File Tail</option>
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+ <option value="/docs/compression.html">Compression</option>
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+ <option value="/docs/run-length.html">Run Length Encoding</option>
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+ <option value="/docs/stripes.html">Stripes</option>
+
+
+
+
+
+
+
+
+
+
+
+
+
+ <option value="/docs/encodings.html">Column Encodings</option>
+
+
+
+
+
+
+
+
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+
+
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+
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+
+
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+
+
+
+
+
+
+
+
+
+ <option value="/docs/spec-index.html">Indexes</option>
+
+
+
+
+
+
+
+
+
+
+ </optgroup>
+
+ </select>
+</div>
+
+
+ <div class="unit four-fifths">
+ <article>
+ <h1>ACID support</h1>
+ <p>Historically, the only way to atomically add data to a table in Hive
+was to add a new partition. Updating or deleting data in partition
+required removing the old partition and adding it back with the new
+data and it wasn’t possible to do atomically.</p>
+
+<p>However, user’s data is continually changing and as Hive matured,
+users required reliability guarantees despite the churning data
+lake. Thus, we needed to implement ACID transactions that guarantee
+atomicity, consistency, isolation, and durability. Although we support
+ACID transactions, they are not designed to support OLTP requirements.
+It can support millions of rows updated per a transaction, but it can
+not support millions of transactions an hour.</p>
+
+<p>Additionally, we wanted to support streaming ingest in to Hive tables where
+streaming applications like Flume or Storm could write data into Hive and
+have transactions commit once a minute and queries would either see all of
+a transaction or none of it.</p>
+
+<p>HDFS is a write once file system and ORC is a write-once file format, so edits
+were implemented using base files and delta files where insert, update, and
+delete operations are recorded.</p>
+
+<p>Hive tables without ACID enabled have each partition in HDFS look like:</p>
+
+<table>
+ <thead>
+ <tr>
+ <th style="text-align: left">Filename</th>
+ <th style="text-align: left">Contents</th>
+ </tr>
+ </thead>
+ <tbody>
+ <tr>
+ <td style="text-align: left">00000_0</td>
+ <td style="text-align: left">Bucket 0</td>
+ </tr>
+ <tr>
+ <td style="text-align: left">00001_0</td>
+ <td style="text-align: left">Bucket 1</td>
+ </tr>
+ </tbody>
+</table>
+
+<p>With ACID enabled, the system will add delta directories:</p>
+
+<table>
+ <thead>
+ <tr>
+ <th style="text-align: left">Filename</th>
+ <th style="text-align: left">Contents</th>
+ </tr>
+ </thead>
+ <tbody>
+ <tr>
+ <td style="text-align: left">00000_0</td>
+ <td style="text-align: left">Bucket 0 base</td>
+ </tr>
+ <tr>
+ <td style="text-align: left">00001_0</td>
+ <td style="text-align: left">Bucket 1 base</td>
+ </tr>
+ <tr>
+ <td style="text-align: left">delta_0000005_0000005/bucket_00000</td>
+ <td style="text-align: left">Transaction 5 to 5, bucket 0 delta</td>
+ </tr>
+ <tr>
+ <td style="text-align: left">delta_0000005_0000005/bucket_00001</td>
+ <td style="text-align: left">Transaction 5 to 5, bucket 1 delta</td>
+ </tr>
+ </tbody>
+</table>
+
+<p>When too many deltas have been created, a minor compaction will automatically
+run and merge a set of transactions into a single delta:</p>
+
+<table>
+ <thead>
+ <tr>
+ <th style="text-align: left">Filename</th>
+ <th style="text-align: left">Contents</th>
+ </tr>
+ </thead>
+ <tbody>
+ <tr>
+ <td style="text-align: left">00000_0</td>
+ <td style="text-align: left">Bucket 0 base</td>
+ </tr>
+ <tr>
+ <td style="text-align: left">00001_0</td>
+ <td style="text-align: left">Bucket 1 base</td>
+ </tr>
+ <tr>
+ <td style="text-align: left">delta_0000005_0000010/bucket_00000</td>
+ <td style="text-align: left">Transaction 5 to 10, bucket 0 delta</td>
+ </tr>
+ <tr>
+ <td style="text-align: left">delta_0000005_0000010/bucket_00001</td>
+ <td style="text-align: left">Transaction 5 to 10, bucket 1 delta</td>
+ </tr>
+ </tbody>
+</table>
+
+<p>When the deltas get large enough, major compaction will re-write the base
+to incorporate the deltas.</p>
+
+<table>
+ <thead>
+ <tr>
+ <th style="text-align: left">Filename</th>
+ <th style="text-align: left">Contents</th>
+ </tr>
+ </thead>
+ <tbody>
+ <tr>
+ <td style="text-align: left">base_0000010/bucket_00000</td>
+ <td style="text-align: left">Transactions upto 10, bucket 0 base</td>
+ </tr>
+ <tr>
+ <td style="text-align: left">base_0000010/bucket_00001</td>
+ <td style="text-align: left">Transactions upto 10, bucket 1 base</td>
+ </tr>
+ </tbody>
+</table>
+
+<p>Reads and compactions do not require locks and thus compactions can
+not destructively modify their inputs, but rather write new
+directories.</p>
+
+<p>All rows are given an automatic assigned row id, which is the triple of
+original transaction id, bucket, and row id, that is guaranteed to be unique.
+All update and delete operations refer to that triple.</p>
+
+<p>The ORC files in an ACID table are extended with several column. They
+are the operation (insert, update, or delete), the triple that
+uniquely identifies the row (originalTransaction, bucket, rowId), and
+the current transaction.</p>
+
+<p><code>struct<
+ operation: int,
+ originalTransaction: bigInt,
+ bucket: int,
+ rowId: bitInt,
+ currentTransaction: bigInt,
+ row: struct<...>
+>
+</code></p>
+
+<p>The serialization for the operation codes is:</p>
+
+<table>
+ <thead>
+ <tr>
+ <th style="text-align: left">Operation</th>
+ <th style="text-align: left">Serialization</th>
+ </tr>
+ </thead>
+ <tbody>
+ <tr>
+ <td style="text-align: left">INSERT</td>
+ <td style="text-align: left">0</td>
+ </tr>
+ <tr>
+ <td style="text-align: left">UPDATE</td>
+ <td style="text-align: left">1</td>
+ </tr>
+ <tr>
+ <td style="text-align: left">DELETE</td>
+ <td style="text-align: left">2</td>
+ </tr>
+ </tbody>
+</table>
+
+<p>When a application or query reads the ACID table, the reader provides
+the list of committed transactions to include. This list is produced
+by the Hive metastore when a query starts. The task does a merge
+sort. Each of the files is sorted by (originalTransaction ascending,
+bucket ascending, rowId ascending, and currentTransaction
+descending). Only the first record with a currentTransaction that is
+in the list of transactions to read is returned, which corresponds to
+the last visible update to a row.</p>
+
+<p>To support streaming ingest, we add two additional features. ORC files
+may have additional footers written in to their body that is parsable
+as a complete ORC file that only includes the records already
+written. As the file is later extended the preliminary file footer
+becomes dead space within the file. Secondly, a side file named
+“*_flush_length” is a small file that contains a set of 8 byte
+values. The last complete 8 byte value is the end of the last
+preliminary footer. </p>
+
+<p>Two properties are added to the metadata for ORC files to speed up the
+processing of the ACID tables. In particular, when a task is reading
+part of the base file for a bucket, it will use the first and last
+rowIds to find the corresponding spots in the delta files. The
+hive.acid.key.index lets the reader skip over stripes in the delta
+file that don’t need to be read in this task.</p>
+
+<table>
+ <thead>
+ <tr>
+ <th style="text-align: left">Key</th>
+ <th style="text-align: left">Meaning</th>
+ </tr>
+ </thead>
+ <tbody>
+ <tr>
+ <td style="text-align: left">hive.acid.stats</td>
+ <td style="text-align: left">Number of inserts, updates, and deletes comma separated</td>
+ </tr>
+ <tr>
+ <td style="text-align: left">hive.acid.key.index</td>
+ <td style="text-align: left">The last originalTransaction, bucket, rowId for each stripe</td>
+ </tr>
+ </tbody>
+</table>
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+ <div class="section-nav">
+ <div class="left align-right">
+
+
+
+ <a href="/docs/indexes.html" class="prev">Back</a>
+
+ </div>
+ <div class="right align-left">
+
+
+
+ <a href="/docs/hive-ddl.html" class="next">Next</a>
+
+ </div>
+ </div>
+ <div class="clear"></div>
+
+
+ </article>
+ </div>
+
+ <div class="unit one-fifth hide-on-mobiles">
+ <aside>
+
+ <h4>Overview</h4>
+
+
+<ul>
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+ <li class=""><a href="/docs/index.html">Background</a></li>
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+ <li class=""><a href="/docs/types.html">Types</a></li>
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+ <li class=""><a href="/docs/indexes.html">Indexes</a></li>
+
+
+
+
+
+
+
+
+
+
+
+ <li class="current"><a href="/docs/acid.html">ACID support</a></li>
+
+
+
+</ul>
+
+
+ <h4>Hive Usage</h4>
+
+
+<ul>
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+ <li class=""><a href="/docs/hive-ddl.html">Hive DDL</a></li>
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+ <li class=""><a href="/docs/hive-config.html">Hive Configuration</a></li>
+
+
+
+</ul>
+
+
+ <h4>Format Specification</h4>
+
+
+<ul>
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+ <li class=""><a href="/docs/spec-intro.html">Introduction</a></li>
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+ <li class=""><a href="/docs/file-tail.html">File Tail</a></li>
+
+
+
+
+
+
+
+
+
+
+
+
+
+ <li class=""><a href="/docs/compression.html">Compression</a></li>
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+ <li class=""><a href="/docs/run-length.html">Run Length Encoding</a></li>
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+ <li class=""><a href="/docs/stripes.html">Stripes</a></li>
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+ <li class=""><a href="/docs/encodings.html">Column Encodings</a></li>
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+ <li class=""><a href="/docs/spec-index.html">Indexes</a></li>
+
+
+
+</ul>
+
+
+ </aside>
+</div>
+
+
+ <div class="clear"></div>
+
+ </div>
+ </section>
+
+
+ <footer role="contentinfo">
+ <p>The contents of this website are © 2015
+ <a href="https://www.apache.org/">Apache Software Foundation</a>
+ under the terms of the <a
+ href="https://www.apache.org/licenses/LICENSE-2.0.html">
+ Apache License v2</a>. Apache ORC and its logo are trademarks
+ of the Apache Software Foundation.</p>
+</footer>
+
+ <script>
+ var anchorForId = function (id) {
+ var anchor = document.createElement("a");
+ anchor.className = "header-link";
+ anchor.href = "#" + id;
+ anchor.innerHTML = "<span class=\"sr-only\">Permalink</span><i class=\"fa fa-link\"></i>";
+ anchor.title = "Permalink";
+ return anchor;
+ };
+
+ var linkifyAnchors = function (level, containingElement) {
+ var headers = containingElement.getElementsByTagName("h" + level);
+ for (var h = 0; h < headers.length; h++) {
+ var header = headers[h];
+
+ if (typeof header.id !== "undefined" && header.id !== "") {
+ header.appendChild(anchorForId(header.id));
+ }
+ }
+ };
+
+ document.onreadystatechange = function () {
+ if (this.readyState === "complete") {
+ var contentBlock = document.getElementsByClassName("docs")[0] || document.getElementsByClassName("news")[0];
+ if (!contentBlock) {
+ return;
+ }
+ for (var level = 1; level <= 6; level++) {
+ linkifyAnchors(level, contentBlock);
+ }
+ }
+ };
+</script>
+
+
+</body>
+</html>
[8/8] orc git commit: Push update to site.
Posted by om...@apache.org.
Push update to site.
Project: http://git-wip-us.apache.org/repos/asf/orc/repo
Commit: http://git-wip-us.apache.org/repos/asf/orc/commit/ae9722a6
Tree: http://git-wip-us.apache.org/repos/asf/orc/tree/ae9722a6
Diff: http://git-wip-us.apache.org/repos/asf/orc/diff/ae9722a6
Branch: refs/heads/asf-site
Commit: ae9722a68a0f467314f87eade25486a76f32fb31
Parents: fdf06e4
Author: Owen O'Malley <om...@apache.org>
Authored: Wed May 13 15:56:43 2015 -0700
Committer: Owen O'Malley <om...@apache.org>
Committed: Wed May 13 15:56:43 2015 -0700
----------------------------------------------------------------------
news/index.html | 12 ++++++++----
1 file changed, 8 insertions(+), 4 deletions(-)
----------------------------------------------------------------------
http://git-wip-us.apache.org/repos/asf/orc/blob/ae9722a6/news/index.html
----------------------------------------------------------------------
diff --git a/news/index.html b/news/index.html
index e932264..a813b77 100644
--- a/news/index.html
+++ b/news/index.html
@@ -111,8 +111,10 @@
<span class="post-date">
11 May 2015
</span>
- <a href="https://github.com/omalley" class="post-author">
- <img src="https://github.com/omalley.png" class="avatar" alt="omalley avatar" width="24" height="24">
+ <a href="https://people.apache.org/~omalley" class="post-author">
+ <img src="https://people.apache.org/~omalley//omalley.png"
+ class="avatar" alt="omalley avatar"
+ width="24" height="24">
omalley
</a>
</div>
@@ -149,8 +151,10 @@ for their work on ORC. Welcome all!</p>
<span class="post-date">
22 Apr 2015
</span>
- <a href="https://github.com/omalley" class="post-author">
- <img src="https://github.com/omalley.png" class="avatar" alt="omalley avatar" width="24" height="24">
+ <a href="https://people.apache.org/~omalley" class="post-author">
+ <img src="https://people.apache.org/~omalley//omalley.png"
+ class="avatar" alt="omalley avatar"
+ width="24" height="24">
omalley
</a>
</div>
[4/8] orc git commit: Publish first version of site.
Posted by om...@apache.org.
http://git-wip-us.apache.org/repos/asf/orc/blob/6a400548/docs/hive-ddl.html
----------------------------------------------------------------------
diff --git a/docs/hive-ddl.html b/docs/hive-ddl.html
new file mode 100644
index 0000000..310bbfb
--- /dev/null
+++ b/docs/hive-ddl.html
@@ -0,0 +1,998 @@
+<!DOCTYPE HTML>
+<html lang="en-US">
+<head>
+ <meta charset="UTF-8">
+ <title>Hive DDL</title>
+ <meta name="viewport" content="width=device-width,initial-scale=1">
+ <meta name="generator" content="Jekyll v2.4.0">
+ <link rel="stylesheet" href="//fonts.googleapis.com/css?family=Lato:300,300italic,400,400italic,700,700italic,900">
+ <link rel="stylesheet" href="/css/screen.css">
+ <link rel="icon" type="image/x-icon" href="/favicon.ico">
+ <!--[if lt IE 9]>
+ <script src="/js/html5shiv.min.js"></script>
+ <script src="/js/respond.min.js"></script>
+ <![endif]-->
+</head>
+
+
+<body class="wrap">
+ <header role="banner">
+ <nav class="mobile-nav show-on-mobiles">
+ <ul>
+ <li class="">
+ <a href="/">Home</a>
+ </li>
+ <li class="current">
+ <a href="/docs/">Documentation</a>
+ </li>
+ <li class="">
+ <a href="/talks/">Talks</a>
+ </li>
+ <li class="">
+ <a href="/news/">News</a>
+ </li>
+ <li class="">
+ <a href="/help/">Help</a>
+ </li>
+ <li class="">
+ <a href="/develop/">Develop</a>
+ </li>
+</ul>
+
+ </nav>
+ <div class="grid">
+ <div class="unit one-third center-on-mobiles">
+ <h1>
+ <a href="/">
+ <span class="sr-only">Apache ORC</span>
+ <img src="/img/logo.png" width="249" height="115" alt="ORC Logo">
+ </a>
+ </h1>
+ </div>
+ <nav class="main-nav unit two-thirds hide-on-mobiles">
+ <ul>
+ <li class="">
+ <a href="/">Home</a>
+ </li>
+ <li class="current">
+ <a href="/docs/">Documentation</a>
+ </li>
+ <li class="">
+ <a href="/talks/">Talks</a>
+ </li>
+ <li class="">
+ <a href="/news/">News</a>
+ </li>
+ <li class="">
+ <a href="/help/">Help</a>
+ </li>
+ <li class="">
+ <a href="/develop/">Develop</a>
+ </li>
+</ul>
+
+ </nav>
+ </div>
+</header>
+
+
+ <section class="docs">
+ <div class="grid">
+
+ <div class="docs-nav-mobile unit whole show-on-mobiles">
+ <select onchange="if (this.value) window.location.href=this.value">
+ <option value="">Navigate the docs…</option>
+
+ <optgroup label="Overview">
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+ <option value="/docs/index.html">Background</option>
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+ <option value="/docs/types.html">Types</option>
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+ <option value="/docs/indexes.html">Indexes</option>
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+ <option value="/docs/acid.html">ACID support</option>
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+ </optgroup>
+
+ <optgroup label="Hive Usage">
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+ <option value="/docs/hive-ddl.html">Hive DDL</option>
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+ <option value="/docs/hive-config.html">Hive Configuration</option>
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+ </optgroup>
+
+ <optgroup label="Format Specification">
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+ <option value="/docs/spec-intro.html">Introduction</option>
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+ <option value="/docs/file-tail.html">File Tail</option>
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+ <option value="/docs/compression.html">Compression</option>
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+ <option value="/docs/run-length.html">Run Length Encoding</option>
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+ <option value="/docs/stripes.html">Stripes</option>
+
+
+
+
+
+
+
+
+
+
+
+
+
+ <option value="/docs/encodings.html">Column Encodings</option>
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+ <option value="/docs/spec-index.html">Indexes</option>
+
+
+
+
+
+
+
+
+
+
+ </optgroup>
+
+ </select>
+</div>
+
+
+ <div class="unit four-fifths">
+ <article>
+ <h1>Hive DDL</h1>
+ <p>ORC is well integrated into Hive, so storing your istari table as ORC
+is done by adding “STORED AS ORC”.</p>
+
+<p><code>CREATE TABLE istari (
+ name STRING,
+ color STRING
+) STORED AS ORC;
+</code></p>
+
+<p>To modify a table so that new partitions of the istari table are
+stored as ORC files:</p>
+
+<p><code>ALTER TABLE istari SET FILEFORMAT ORC;
+</code></p>
+
+<p>As of Hive 0.14, users can request an efficient merge of small ORC files
+together by issuing a CONCATENATE command on their table or partition. The
+files will be merged at the stripe level without reserializatoin.</p>
+
+<p><code>ALTER TABLE istari [PARTITION partition_spec] CONCATENATE;
+</code></p>
+
+<p>To get information about an ORC file, use the orcfiledump command.</p>
+
+<p><code>% hive --orcfiledump <path_to_file>
+</code></p>
+
+<p>As of Hive 1.1, to display the data in the ORC file, use:</p>
+
+<p><code>% hive --orcfiledump -d <path_to_file>
+</code></p>
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+ <div class="section-nav">
+ <div class="left align-right">
+
+
+
+ <a href="/docs/acid.html" class="prev">Back</a>
+
+ </div>
+ <div class="right align-left">
+
+
+
+ <a href="/docs/hive-config.html" class="next">Next</a>
+
+ </div>
+ </div>
+ <div class="clear"></div>
+
+
+ </article>
+ </div>
+
+ <div class="unit one-fifth hide-on-mobiles">
+ <aside>
+
+ <h4>Overview</h4>
+
+
+<ul>
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+ <li class=""><a href="/docs/index.html">Background</a></li>
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+ <li class=""><a href="/docs/types.html">Types</a></li>
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+ <li class=""><a href="/docs/indexes.html">Indexes</a></li>
+
+
+
+
+
+
+
+
+
+
+
+ <li class=""><a href="/docs/acid.html">ACID support</a></li>
+
+
+
+</ul>
+
+
+ <h4>Hive Usage</h4>
+
+
+<ul>
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+ <li class="current"><a href="/docs/hive-ddl.html">Hive DDL</a></li>
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+ <li class=""><a href="/docs/hive-config.html">Hive Configuration</a></li>
+
+
+
+</ul>
+
+
+ <h4>Format Specification</h4>
+
+
+<ul>
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+ <li class=""><a href="/docs/spec-intro.html">Introduction</a></li>
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+ <li class=""><a href="/docs/file-tail.html">File Tail</a></li>
+
+
+
+
+
+
+
+
+
+
+
+
+
+ <li class=""><a href="/docs/compression.html">Compression</a></li>
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+ <li class=""><a href="/docs/run-length.html">Run Length Encoding</a></li>
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+ <li class=""><a href="/docs/stripes.html">Stripes</a></li>
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+ <li class=""><a href="/docs/encodings.html">Column Encodings</a></li>
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+ <li class=""><a href="/docs/spec-index.html">Indexes</a></li>
+
+
+
+</ul>
+
+
+ </aside>
+</div>
+
+
+ <div class="clear"></div>
+
+ </div>
+ </section>
+
+
+ <footer role="contentinfo">
+ <p>The contents of this website are © 2015
+ <a href="https://www.apache.org/">Apache Software Foundation</a>
+ under the terms of the <a
+ href="https://www.apache.org/licenses/LICENSE-2.0.html">
+ Apache License v2</a>. Apache ORC and its logo are trademarks
+ of the Apache Software Foundation.</p>
+</footer>
+
+ <script>
+ var anchorForId = function (id) {
+ var anchor = document.createElement("a");
+ anchor.className = "header-link";
+ anchor.href = "#" + id;
+ anchor.innerHTML = "<span class=\"sr-only\">Permalink</span><i class=\"fa fa-link\"></i>";
+ anchor.title = "Permalink";
+ return anchor;
+ };
+
+ var linkifyAnchors = function (level, containingElement) {
+ var headers = containingElement.getElementsByTagName("h" + level);
+ for (var h = 0; h < headers.length; h++) {
+ var header = headers[h];
+
+ if (typeof header.id !== "undefined" && header.id !== "") {
+ header.appendChild(anchorForId(header.id));
+ }
+ }
+ };
+
+ document.onreadystatechange = function () {
+ if (this.readyState === "complete") {
+ var contentBlock = document.getElementsByClassName("docs")[0] || document.getElementsByClassName("news")[0];
+ if (!contentBlock) {
+ return;
+ }
+ for (var level = 1; level <= 6; level++) {
+ linkifyAnchors(level, contentBlock);
+ }
+ }
+ };
+</script>
+
+
+</body>
+</html>
http://git-wip-us.apache.org/repos/asf/orc/blob/6a400548/docs/index.html
----------------------------------------------------------------------
diff --git a/docs/index.html b/docs/index.html
new file mode 100644
index 0000000..8eae9af
--- /dev/null
+++ b/docs/index.html
@@ -0,0 +1,984 @@
+<!DOCTYPE HTML>
+<html lang="en-US">
+<head>
+ <meta charset="UTF-8">
+ <title>Background</title>
+ <meta name="viewport" content="width=device-width,initial-scale=1">
+ <meta name="generator" content="Jekyll v2.4.0">
+ <link rel="stylesheet" href="//fonts.googleapis.com/css?family=Lato:300,300italic,400,400italic,700,700italic,900">
+ <link rel="stylesheet" href="/css/screen.css">
+ <link rel="icon" type="image/x-icon" href="/favicon.ico">
+ <!--[if lt IE 9]>
+ <script src="/js/html5shiv.min.js"></script>
+ <script src="/js/respond.min.js"></script>
+ <![endif]-->
+</head>
+
+
+<body class="wrap">
+ <header role="banner">
+ <nav class="mobile-nav show-on-mobiles">
+ <ul>
+ <li class="">
+ <a href="/">Home</a>
+ </li>
+ <li class="current">
+ <a href="/docs/">Documentation</a>
+ </li>
+ <li class="">
+ <a href="/talks/">Talks</a>
+ </li>
+ <li class="">
+ <a href="/news/">News</a>
+ </li>
+ <li class="">
+ <a href="/help/">Help</a>
+ </li>
+ <li class="">
+ <a href="/develop/">Develop</a>
+ </li>
+</ul>
+
+ </nav>
+ <div class="grid">
+ <div class="unit one-third center-on-mobiles">
+ <h1>
+ <a href="/">
+ <span class="sr-only">Apache ORC</span>
+ <img src="/img/logo.png" width="249" height="115" alt="ORC Logo">
+ </a>
+ </h1>
+ </div>
+ <nav class="main-nav unit two-thirds hide-on-mobiles">
+ <ul>
+ <li class="">
+ <a href="/">Home</a>
+ </li>
+ <li class="current">
+ <a href="/docs/">Documentation</a>
+ </li>
+ <li class="">
+ <a href="/talks/">Talks</a>
+ </li>
+ <li class="">
+ <a href="/news/">News</a>
+ </li>
+ <li class="">
+ <a href="/help/">Help</a>
+ </li>
+ <li class="">
+ <a href="/develop/">Develop</a>
+ </li>
+</ul>
+
+ </nav>
+ </div>
+</header>
+
+
+ <section class="docs">
+ <div class="grid">
+
+ <div class="docs-nav-mobile unit whole show-on-mobiles">
+ <select onchange="if (this.value) window.location.href=this.value">
+ <option value="">Navigate the docs…</option>
+
+ <optgroup label="Overview">
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+ <option value="/docs/index.html">Background</option>
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+ <option value="/docs/types.html">Types</option>
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+ <option value="/docs/indexes.html">Indexes</option>
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+ <option value="/docs/acid.html">ACID support</option>
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+ </optgroup>
+
+ <optgroup label="Hive Usage">
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+ <option value="/docs/hive-ddl.html">Hive DDL</option>
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+ <option value="/docs/hive-config.html">Hive Configuration</option>
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+ </optgroup>
+
+ <optgroup label="Format Specification">
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+ <option value="/docs/spec-intro.html">Introduction</option>
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+ <option value="/docs/file-tail.html">File Tail</option>
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+ <option value="/docs/compression.html">Compression</option>
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+ <option value="/docs/run-length.html">Run Length Encoding</option>
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+ <option value="/docs/stripes.html">Stripes</option>
+
+
+
+
+
+
+
+
+
+
+
+
+
+ <option value="/docs/encodings.html">Column Encodings</option>
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+ <option value="/docs/spec-index.html">Indexes</option>
+
+
+
+
+
+
+
+
+
+
+ </optgroup>
+
+ </select>
+</div>
+
+
+ <div class="unit four-fifths">
+ <article>
+ <h1>Background</h1>
+ <p>Back in January 2013, we created ORC files as part of the initiative
+to massively speed up Apache Hive and improve the storage efficiency
+of data stored in Apache Hadoop. The focus was on enabling high speed
+processing and reducing file sizes.</p>
+
+<p>ORC is a self-describing type-aware columnar file format designed for
+Hadoop workloads. It is optimized for large streaming reads, but with
+integrated support for finding required rows quickly. Storing data in
+a columnar format lets the reader read, decompress, and process only
+the values that are required for the current query. Because ORC files
+are type-aware, the writer chooses the most appropriate encoding for
+the type and builds an internal index as the file is written.</p>
+
+<p>Predicate pushdown uses those indexes to determine which stripes in a
+file need to be read for a particular query and the row indexes can
+narrow the search to a particular set of 10,000 rows. ORC supports the
+complete set of types in Hive, including the complex types: structs,
+lists, maps, and unions.</p>
+
+<p>Many large Hadoop users have adopted ORC. For instance, Facebook uses
+ORC to <a href="http://s.apache.org/fb-scaling-300-pb">save tens of petabytes</a>
+in their data warehouse and demonstrated that ORC is <a href="http://s.apache.org/presto-orc">significantly
+faster</a> than RC File or Parquet. Yahoo
+uses ORC to store their production data and has released some of their
+<a href="http://s.apache.org/yahoo-orc">benchmark results</a>.</p>
+
+<p>ORC files are divided in to <em>stripes</em> that are roughly 64MB by
+default. The stripes in a file are independent of each other and form
+the natural unit of distributed work. Within each stripe, the columns
+are separated from each other so the reader can read just the columns
+that are required.</p>
+
+
+
+
+
+
+
+
+
+ <div class="section-nav">
+ <div class="left align-right">
+
+ <span class="prev disabled">Back</span>
+
+ </div>
+ <div class="right align-left">
+
+
+
+ <a href="/docs/types.html" class="next">Next</a>
+
+ </div>
+ </div>
+ <div class="clear"></div>
+
+
+ </article>
+ </div>
+
+ <div class="unit one-fifth hide-on-mobiles">
+ <aside>
+
+ <h4>Overview</h4>
+
+
+<ul>
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+ <li class="current"><a href="/docs/index.html">Background</a></li>
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+ <li class=""><a href="/docs/types.html">Types</a></li>
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+ <li class=""><a href="/docs/indexes.html">Indexes</a></li>
+
+
+
+
+
+
+
+
+
+
+
+ <li class=""><a href="/docs/acid.html">ACID support</a></li>
+
+
+
+</ul>
+
+
+ <h4>Hive Usage</h4>
+
+
+<ul>
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+ <li class=""><a href="/docs/hive-ddl.html">Hive DDL</a></li>
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+ <li class=""><a href="/docs/hive-config.html">Hive Configuration</a></li>
+
+
+
+</ul>
+
+
+ <h4>Format Specification</h4>
+
+
+<ul>
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+ <li class=""><a href="/docs/spec-intro.html">Introduction</a></li>
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+ <li class=""><a href="/docs/file-tail.html">File Tail</a></li>
+
+
+
+
+
+
+
+
+
+
+
+
+
+ <li class=""><a href="/docs/compression.html">Compression</a></li>
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+ <li class=""><a href="/docs/run-length.html">Run Length Encoding</a></li>
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+ <li class=""><a href="/docs/stripes.html">Stripes</a></li>
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+ <li class=""><a href="/docs/encodings.html">Column Encodings</a></li>
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+ <li class=""><a href="/docs/spec-index.html">Indexes</a></li>
+
+
+
+</ul>
+
+
+ </aside>
+</div>
+
+
+ <div class="clear"></div>
+
+ </div>
+ </section>
+
+
+ <footer role="contentinfo">
+ <p>The contents of this website are © 2015
+ <a href="https://www.apache.org/">Apache Software Foundation</a>
+ under the terms of the <a
+ href="https://www.apache.org/licenses/LICENSE-2.0.html">
+ Apache License v2</a>. Apache ORC and its logo are trademarks
+ of the Apache Software Foundation.</p>
+</footer>
+
+ <script>
+ var anchorForId = function (id) {
+ var anchor = document.createElement("a");
+ anchor.className = "header-link";
+ anchor.href = "#" + id;
+ anchor.innerHTML = "<span class=\"sr-only\">Permalink</span><i class=\"fa fa-link\"></i>";
+ anchor.title = "Permalink";
+ return anchor;
+ };
+
+ var linkifyAnchors = function (level, containingElement) {
+ var headers = containingElement.getElementsByTagName("h" + level);
+ for (var h = 0; h < headers.length; h++) {
+ var header = headers[h];
+
+ if (typeof header.id !== "undefined" && header.id !== "") {
+ header.appendChild(anchorForId(header.id));
+ }
+ }
+ };
+
+ document.onreadystatechange = function () {
+ if (this.readyState === "complete") {
+ var contentBlock = document.getElementsByClassName("docs")[0] || document.getElementsByClassName("news")[0];
+ if (!contentBlock) {
+ return;
+ }
+ for (var level = 1; level <= 6; level++) {
+ linkifyAnchors(level, contentBlock);
+ }
+ }
+ };
+</script>
+
+
+</body>
+</html>
http://git-wip-us.apache.org/repos/asf/orc/blob/6a400548/docs/indexes.html
----------------------------------------------------------------------
diff --git a/docs/indexes.html b/docs/indexes.html
new file mode 100644
index 0000000..9ae634a
--- /dev/null
+++ b/docs/indexes.html
@@ -0,0 +1,989 @@
+<!DOCTYPE HTML>
+<html lang="en-US">
+<head>
+ <meta charset="UTF-8">
+ <title>Indexes</title>
+ <meta name="viewport" content="width=device-width,initial-scale=1">
+ <meta name="generator" content="Jekyll v2.4.0">
+ <link rel="stylesheet" href="//fonts.googleapis.com/css?family=Lato:300,300italic,400,400italic,700,700italic,900">
+ <link rel="stylesheet" href="/css/screen.css">
+ <link rel="icon" type="image/x-icon" href="/favicon.ico">
+ <!--[if lt IE 9]>
+ <script src="/js/html5shiv.min.js"></script>
+ <script src="/js/respond.min.js"></script>
+ <![endif]-->
+</head>
+
+
+<body class="wrap">
+ <header role="banner">
+ <nav class="mobile-nav show-on-mobiles">
+ <ul>
+ <li class="">
+ <a href="/">Home</a>
+ </li>
+ <li class="current">
+ <a href="/docs/">Documentation</a>
+ </li>
+ <li class="">
+ <a href="/talks/">Talks</a>
+ </li>
+ <li class="">
+ <a href="/news/">News</a>
+ </li>
+ <li class="">
+ <a href="/help/">Help</a>
+ </li>
+ <li class="">
+ <a href="/develop/">Develop</a>
+ </li>
+</ul>
+
+ </nav>
+ <div class="grid">
+ <div class="unit one-third center-on-mobiles">
+ <h1>
+ <a href="/">
+ <span class="sr-only">Apache ORC</span>
+ <img src="/img/logo.png" width="249" height="115" alt="ORC Logo">
+ </a>
+ </h1>
+ </div>
+ <nav class="main-nav unit two-thirds hide-on-mobiles">
+ <ul>
+ <li class="">
+ <a href="/">Home</a>
+ </li>
+ <li class="current">
+ <a href="/docs/">Documentation</a>
+ </li>
+ <li class="">
+ <a href="/talks/">Talks</a>
+ </li>
+ <li class="">
+ <a href="/news/">News</a>
+ </li>
+ <li class="">
+ <a href="/help/">Help</a>
+ </li>
+ <li class="">
+ <a href="/develop/">Develop</a>
+ </li>
+</ul>
+
+ </nav>
+ </div>
+</header>
+
+
+ <section class="docs">
+ <div class="grid">
+
+ <div class="docs-nav-mobile unit whole show-on-mobiles">
+ <select onchange="if (this.value) window.location.href=this.value">
+ <option value="">Navigate the docs…</option>
+
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+ <option value="/docs/spec-index.html">Indexes</option>
+
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+
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+
+
+ </optgroup>
+
+ </select>
+</div>
+
+
+ <div class="unit four-fifths">
+ <article>
+ <h1>Indexes</h1>
+ <p>ORC provides three level of indexes within each file:</p>
+
+<ul>
+ <li>file level - statistics about the values in each column across the entire
+file</li>
+ <li>stripe level - statistics about the values in each column for each stripe</li>
+ <li>row level - statistics about the values in each column for each set of
+10,000 rows within a stripe</li>
+</ul>
+
+<p>The file and stripe level column statistics are in the file footer so
+that they are easy to access to determine if the rest of the file
+needs to be read at all. Row level indexes include both the column
+statistics for each row group and the position for seeking to the
+start of the row group.</p>
+
+<p>Column statistics always contain the count of values and whether there
+are null values present. Most other primitive types include the
+minimum and maximum values and for numeric types the sum. As of Hive
+1.2, the indexes can include bloom filters, which provide a much more
+selective filter.</p>
+
+<p>The indexes at all levels are used by the reader using Search
+ARGuments or SARGs, which are simplified expressions that restrict the
+rows that are of interest. For example, if a query was looking for
+people older than 100 years old, the SARG would be “age > 100” and
+only files, stripes, or row groups that had people over 100 years old
+would be read.</p>
+
+
+
+
+
+
+
+
+
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+
+
+ <div class="section-nav">
+ <div class="left align-right">
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+
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+
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+ <a href="/docs/acid.html" class="next">Next</a>
+
+ </div>
+ </div>
+ <div class="clear"></div>
+
+
+ </article>
+ </div>
+
+ <div class="unit one-fifth hide-on-mobiles">
+ <aside>
+
+ <h4>Overview</h4>
+
+
+<ul>
+
+
+
+
+
+
+
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+
+
+
+
+
+
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+
+ <li class=""><a href="/docs/index.html">Background</a></li>
+
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+
+ <li class=""><a href="/docs/types.html">Types</a></li>
+
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+ <li class="current"><a href="/docs/indexes.html">Indexes</a></li>
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+
+
+
+ <li class=""><a href="/docs/acid.html">ACID support</a></li>
+
+
+
+</ul>
+
+
+ <h4>Hive Usage</h4>
+
+
+<ul>
+
+
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+
+
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+
+
+
+
+
+
+
+
+
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+
+ <li class=""><a href="/docs/hive-ddl.html">Hive DDL</a></li>
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+
+
+
+
+
+
+
+
+ <li class=""><a href="/docs/hive-config.html">Hive Configuration</a></li>
+
+
+
+</ul>
+
+
+ <h4>Format Specification</h4>
+
+
+<ul>
+
+
+
+
+
+
+
+
+
+
+
+
+
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+
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+
+
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+
+
+
+
+
+ <li class=""><a href="/docs/spec-intro.html">Introduction</a></li>
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+ <li class=""><a href="/docs/file-tail.html">File Tail</a></li>
+
+
+
+
+
+
+
+
+
+
+
+
+
+ <li class=""><a href="/docs/compression.html">Compression</a></li>
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+ <li class=""><a href="/docs/run-length.html">Run Length Encoding</a></li>
+
+
+
+
+
+
+
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+
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+
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+
+
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+
+
+
+
+
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+
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+
+
+
+
+
+
+
+ <li class=""><a href="/docs/stripes.html">Stripes</a></li>
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+ <li class=""><a href="/docs/encodings.html">Column Encodings</a></li>
+
+
+
+
+
+
+
+
+
+
+
+
+
+
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+
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+
+ <li class=""><a href="/docs/spec-index.html">Indexes</a></li>
+
+
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+</ul>
+
+
+ </aside>
+</div>
+
+
+ <div class="clear"></div>
+
+ </div>
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+ <footer role="contentinfo">
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http://git-wip-us.apache.org/repos/asf/orc/blob/6a400548/docs/run-length.html
----------------------------------------------------------------------
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new file mode 100644
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--- /dev/null
+++ b/docs/run-length.html
@@ -0,0 +1,1377 @@
+<!DOCTYPE HTML>
+<html lang="en-US">
+<head>
+ <meta charset="UTF-8">
+ <title>Run Length Encoding</title>
+ <meta name="viewport" content="width=device-width,initial-scale=1">
+ <meta name="generator" content="Jekyll v2.4.0">
+ <link rel="stylesheet" href="//fonts.googleapis.com/css?family=Lato:300,300italic,400,400italic,700,700italic,900">
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+ <div class="unit one-third center-on-mobiles">
+ <h1>
+ <a href="/">
+ <span class="sr-only">Apache ORC</span>
+ <img src="/img/logo.png" width="249" height="115" alt="ORC Logo">
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+ </optgroup>
+
+ <optgroup label="Format Specification">
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+ <option value="/docs/spec-intro.html">Introduction</option>
+
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+ <option value="/docs/file-tail.html">File Tail</option>
+
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+
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+
+
+
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+
+
+
+ <option value="/docs/run-length.html">Run Length Encoding</option>
+
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+
+
+
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+
+
+
+
+
+
+
+
+
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+
+
+
+
+
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+
+
+
+
+
+
+
+
+
+ <option value="/docs/stripes.html">Stripes</option>
+
+
+
+
+
+
+
+
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+
+
+
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+ <option value="/docs/encodings.html">Column Encodings</option>
+
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+
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+
+
+
+
+ <option value="/docs/spec-index.html">Indexes</option>
+
+
+
+
+
+
+
+
+
+
+ </optgroup>
+
+ </select>
+</div>
+
+
+ <div class="unit four-fifths">
+ <article>
+ <h1>Run Length Encoding</h1>
+ <h1 id="base-128-varint">Base 128 Varint</h1>
+
+<p>Variable width integer encodings take advantage of the fact that most
+numbers are small and that having smaller encodings for small numbers
+shrinks the overall size of the data. ORC uses the varint format from
+Protocol Buffers, which writes data in little endian format using the
+low 7 bits of each byte. The high bit in each byte is set if the
+number continues into the next byte.</p>
+
+<table>
+ <thead>
+ <tr>
+ <th style="text-align: left">Unsigned Original</th>
+ <th style="text-align: left">Serialized</th>
+ </tr>
+ </thead>
+ <tbody>
+ <tr>
+ <td style="text-align: left">0</td>
+ <td style="text-align: left">0x00</td>
+ </tr>
+ <tr>
+ <td style="text-align: left">1</td>
+ <td style="text-align: left">0x01</td>
+ </tr>
+ <tr>
+ <td style="text-align: left">127</td>
+ <td style="text-align: left">0x7f</td>
+ </tr>
+ <tr>
+ <td style="text-align: left">128</td>
+ <td style="text-align: left">0x80, 0x01</td>
+ </tr>
+ <tr>
+ <td style="text-align: left">129</td>
+ <td style="text-align: left">0x81, 0x01</td>
+ </tr>
+ <tr>
+ <td style="text-align: left">16,383</td>
+ <td style="text-align: left">0xff, 0x7f</td>
+ </tr>
+ <tr>
+ <td style="text-align: left">16,384</td>
+ <td style="text-align: left">0x80, 0x80, 0x01</td>
+ </tr>
+ <tr>
+ <td style="text-align: left">16,385</td>
+ <td style="text-align: left">0x81, 0x80, 0x01</td>
+ </tr>
+ </tbody>
+</table>
+
+<p>For signed integer types, the number is converted into an unsigned
+number using a zigzag encoding. Zigzag encoding moves the sign bit to
+the least significant bit using the expression (val « 1) ^ (val »
+63) and derives its name from the fact that positive and negative
+numbers alternate once encoded. The unsigned number is then serialized
+as above.</p>
+
+<table>
+ <thead>
+ <tr>
+ <th style="text-align: left">Signed Original</th>
+ <th style="text-align: left">Unsigned</th>
+ </tr>
+ </thead>
+ <tbody>
+ <tr>
+ <td style="text-align: left">0</td>
+ <td style="text-align: left">0</td>
+ </tr>
+ <tr>
+ <td style="text-align: left">-1</td>
+ <td style="text-align: left">1</td>
+ </tr>
+ <tr>
+ <td style="text-align: left">1</td>
+ <td style="text-align: left">2</td>
+ </tr>
+ <tr>
+ <td style="text-align: left">-2</td>
+ <td style="text-align: left">3</td>
+ </tr>
+ <tr>
+ <td style="text-align: left">2</td>
+ <td style="text-align: left">4</td>
+ </tr>
+ </tbody>
+</table>
+
+<h1 id="byte-run-length-encoding">Byte Run Length Encoding</h1>
+
+<p>For byte streams, ORC uses a very light weight encoding of identical
+values.</p>
+
+<ul>
+ <li>Run - a sequence of at least 3 identical values</li>
+ <li>Literals - a sequence of non-identical values</li>
+</ul>
+
+<p>The first byte of each group of values is a header than determines
+whether it is a run (value between 0 to 127) or literal list (value
+between -128 to -1). For runs, the control byte is the length of the
+run minus the length of the minimal run (3) and the control byte for
+literal lists is the negative length of the list. For example, a
+hundred 0’s is encoded as [0x61, 0x00] and the sequence 0x44, 0x45
+would be encoded as [0xfe, 0x44, 0x45]. The next group can choose
+either of the encodings.</p>
+
+<h1 id="boolean-run-length-encoding">Boolean Run Length Encoding</h1>
+
+<p>For encoding boolean types, the bits are put in the bytes from most
+significant to least significant. The bytes are encoded using byte run
+length encoding as described in the previous section. For example,
+the byte sequence [0xff, 0x80] would be one true followed by
+seven false values.</p>
+
+<h1 id="integer-run-length-encoding-version-1">Integer Run Length Encoding, version 1</h1>
+
+<p>In Hive 0.11 ORC files used Run Length Encoding version 1 (RLEv1),
+which provides a lightweight compression of signed or unsigned integer
+sequences. RLEv1 has two sub-encodings:</p>
+
+<ul>
+ <li>Run - a sequence of values that differ by a small fixed delta</li>
+ <li>Literals - a sequence of varint encoded values</li>
+</ul>
+
+<p>Runs start with an initial byte of 0x00 to 0x7f, which encodes the
+length of the run - 3. A second byte provides the fixed delta in the
+range of -128 to 127. Finally, the first value of the run is encoded
+as a base 128 varint.</p>
+
+<p>For example, if the sequence is 100 instances of 7 the encoding would
+start with 100 - 3, followed by a delta of 0, and a varint of 7 for
+an encoding of [0x61, 0x00, 0x07]. To encode the sequence of numbers
+running from 100 to 1, the first byte is 100 - 3, the delta is -1,
+and the varint is 100 for an encoding of [0x61, 0xff, 0x64].</p>
+
+<p>Literals start with an initial byte of 0x80 to 0xff, which corresponds
+to the negative of number of literals in the sequence. Following the
+header byte, the list of N varints is encoded. Thus, if there are
+no runs, the overhead is 1 byte for each 128 integers. The first 5
+prime numbers [2, 3, 4, 7, 11] would encoded as [0xfb, 0x02, 0x03,
+0x04, 0x07, 0xb].</p>
+
+<h1 id="integer-run-length-encoding-version-2">Integer Run Length Encoding, version 2</h1>
+
+<p>In Hive 0.12, ORC introduced Run Length Encoding version 2 (RLEv2),
+which has improved compression and fixed bit width encodings for
+faster expansion. RLEv2 uses four sub-encodings based on the data:</p>
+
+<ul>
+ <li>Short Repeat - used for short sequences with repeated values</li>
+ <li>Direct - used for random sequences with a fixed bit width</li>
+ <li>Patched Base - used for random sequences with a variable bit width</li>
+ <li>Delta - used for monotonically increasing or decreasing sequences</li>
+</ul>
+
+<h2 id="short-repeat">Short Repeat</h2>
+
+<p>The short repeat encoding is used for short repeating integer
+sequences with the goal of minimizing the overhead of the header. All
+of the bits listed in the header are from the first byte to the last
+and from most significant bit to least significant bit. If the type is
+signed, the value is zigzag encoded.</p>
+
+<ul>
+ <li>1 byte header
+ <ul>
+ <li>2 bits for encoding type (0)</li>
+ <li>3 bits for width (W) of repeating value (1 to 8 bytes)</li>
+ <li>3 bits for repeat count (3 to 10 values)</li>
+ </ul>
+ </li>
+ <li>W bytes in big endian format, which is zigzag encoded if they type
+is signed</li>
+</ul>
+
+<p>The unsigned sequence of [10000, 10000, 10000, 10000, 10000] would be
+serialized with short repeat encoding (0), a width of 2 bytes (1), and
+repeat count of 5 (2) as [0x0a, 0x27, 0x10].</p>
+
+<h2 id="direct">Direct</h2>
+
+<p>The direct encoding is used for integer sequences whose values have a
+relatively constant bit width. It encodes the values directly using a
+fixed width big endian encoding. The width of the values is encoded
+using the table below.</p>
+
+<p>The 5 bit width encoding table for RLEv2:</p>
+
+<table>
+ <thead>
+ <tr>
+ <th style="text-align: left">Width in Bits</th>
+ <th style="text-align: left">Encoded Value</th>
+ <th style="text-align: left">Notes</th>
+ </tr>
+ </thead>
+ <tbody>
+ <tr>
+ <td style="text-align: left">0</td>
+ <td style="text-align: left">0</td>
+ <td style="text-align: left">for delta encoding</td>
+ </tr>
+ <tr>
+ <td style="text-align: left">1</td>
+ <td style="text-align: left">0</td>
+ <td style="text-align: left">for non-delta encoding</td>
+ </tr>
+ <tr>
+ <td style="text-align: left">2</td>
+ <td style="text-align: left">1</td>
+ <td style="text-align: left"> </td>
+ </tr>
+ <tr>
+ <td style="text-align: left">4</td>
+ <td style="text-align: left">3</td>
+ <td style="text-align: left"> </td>
+ </tr>
+ <tr>
+ <td style="text-align: left">8</td>
+ <td style="text-align: left">7</td>
+ <td style="text-align: left"> </td>
+ </tr>
+ <tr>
+ <td style="text-align: left">16</td>
+ <td style="text-align: left">15</td>
+ <td style="text-align: left"> </td>
+ </tr>
+ <tr>
+ <td style="text-align: left">24</td>
+ <td style="text-align: left">23</td>
+ <td style="text-align: left"> </td>
+ </tr>
+ <tr>
+ <td style="text-align: left">32</td>
+ <td style="text-align: left">27</td>
+ <td style="text-align: left"> </td>
+ </tr>
+ <tr>
+ <td style="text-align: left">40</td>
+ <td style="text-align: left">28</td>
+ <td style="text-align: left"> </td>
+ </tr>
+ <tr>
+ <td style="text-align: left">48</td>
+ <td style="text-align: left">29</td>
+ <td style="text-align: left"> </td>
+ </tr>
+ <tr>
+ <td style="text-align: left">56</td>
+ <td style="text-align: left">30</td>
+ <td style="text-align: left"> </td>
+ </tr>
+ <tr>
+ <td style="text-align: left">64</td>
+ <td style="text-align: left">31</td>
+ <td style="text-align: left"> </td>
+ </tr>
+ <tr>
+ <td style="text-align: left">3</td>
+ <td style="text-align: left">2</td>
+ <td style="text-align: left">deprecated</td>
+ </tr>
+ <tr>
+ <td style="text-align: left">5 <= x <= 7</td>
+ <td style="text-align: left">x - 1</td>
+ <td style="text-align: left">deprecated</td>
+ </tr>
+ <tr>
+ <td style="text-align: left">9 <= x <= 15</td>
+ <td style="text-align: left">x - 1</td>
+ <td style="text-align: left">deprecated</td>
+ </tr>
+ <tr>
+ <td style="text-align: left">17 <= x <= 21</td>
+ <td style="text-align: left">x - 1</td>
+ <td style="text-align: left">deprecated</td>
+ </tr>
+ <tr>
+ <td style="text-align: left">26</td>
+ <td style="text-align: left">24</td>
+ <td style="text-align: left">deprecated</td>
+ </tr>
+ <tr>
+ <td style="text-align: left">28</td>
+ <td style="text-align: left">25</td>
+ <td style="text-align: left">deprecated</td>
+ </tr>
+ <tr>
+ <td style="text-align: left">30</td>
+ <td style="text-align: left">26</td>
+ <td style="text-align: left">deprecated</td>
+ </tr>
+ </tbody>
+</table>
+
+<ul>
+ <li>2 bytes header
+ <ul>
+ <li>2 bits for encoding type (1)</li>
+ <li>5 bits for encoded width (W) of values (1 to 64 bits) using the 5 bit
+width encoding table</li>
+ <li>9 bits for length (L) (1 to 512 values)</li>
+ </ul>
+ </li>
+ <li>W * L bits (padded to the next byte) encoded in big endian format, which is
+zigzag encoding if the type is signed</li>
+</ul>
+
+<p>The unsigned sequence of [23713, 43806, 57005, 48879] would be
+serialized with direct encoding (1), a width of 16 bits (15), and
+length of 4 (3) as [0x5e, 0x03, 0x5c, 0xa1, 0xab, 0x1e, 0xde, 0xad,
+0xbe, 0xef].</p>
+
+<h2 id="patched-base">Patched Base</h2>
+
+<p>The patched base encoding is used for integer sequences whose bit
+widths varies a lot. The minimum signed value of the sequence is found
+and subtracted from the other values. The bit width of those adjusted
+values is analyzed and the 90 percentile of the bit width is chosen
+as W. The 10\% of values larger than W use patches from a patch list
+to set the additional bits. Patches are encoded as a list of gaps in
+the index values and the additional value bits.</p>
+
+<ul>
+ <li>4 bytes header
+ <ul>
+ <li>2 bits for encoding type (2)</li>
+ <li>5 bits for encoded width (W) of values (1 to 64 bits) using the 5 bit
+ width encoding table</li>
+ <li>9 bits for length (L) (1 to 512 values)</li>
+ <li>3 bits for base value width (BW) (1 to 8 bytes)</li>
+ <li>5 bits for patch width (PW) (1 to 64 bits) using the 5 bit width
+encoding table</li>
+ <li>3 bits for patch gap width (PGW) (1 to 8 bits)</li>
+ <li>5 bits for patch list length (PLL) (0 to 31 patches)</li>
+ </ul>
+ </li>
+ <li>Base value (BW bytes) - The base value is stored as a big endian value
+with negative values marked by the most significant bit set. If it that
+bit is set, the entire value is negated.</li>
+ <li>Data values (W * L bits padded to the byte) - A sequence of W bit positive
+values that are added to the base value.</li>
+ <li>Data values (W * L bits padded to the byte) - A sequence of W bit positive
+values that are added to the base value.</li>
+ <li>Patch list (PLL * (PGW + PW) bytes) - A list of patches for values
+that didn’t fit within W bits. Each entry in the list consists of a
+gap, which is the number of elements skipped from the previous
+patch, and a patch value. Patches are applied by logically or’ing
+the data values with the relevant patch shifted W bits left. If a
+patch is 0, it was introduced to skip over more than 255 items. The
+combined length of each patch (PGW + PW) must be less or equal to
+64.</li>
+</ul>
+
+<p>The unsigned sequence of [2030, 2000, 2020, 1000000, 2040, 2050, 2060,
+2070, 2080, 2090] has a minimum of 2000, which makes the adjusted
+sequence [30, 0, 20, 998000, 40, 50, 60, 70, 80, 90]. It has an
+encoding of patched base (2), a bit width of 8 (7), a length of 10
+(9), a base value width of 2 bytes (1), a patch width of 12 bits (11),
+patch gap width of 2 bits (1), and a patch list length of 1 (1). The
+base value is 2000 and the combined result is [0x8e, 0x09, 0x2b, 0x21,
+0x07, 0xd0, 0x1e, 0x00, 0x14, 0x70, 0x28, 0x32, 0x3c, 0x46, 0x50,
+0x5a, 0xfc, 0xe8]</p>
+
+<h2 id="delta">Delta</h2>
+
+<p>The Delta encoding is used for monotonically increasing or decreasing
+sequences. The first two numbers in the sequence can not be identical,
+because the encoding is using the sign of the first delta to determine
+if the series is increasing or decreasing.</p>
+
+<ul>
+ <li>2 bytes header
+ <ul>
+ <li>2 bits for encoding type (3)</li>
+ <li>5 bits for encoded width (W) of deltas (0 to 64 bits) using the 5 bit
+width encoding table</li>
+ <li>9 bits for run length (L) (1 to 512 values)</li>
+ </ul>
+ </li>
+ <li>Base value - encoded as (signed or unsigned) varint</li>
+ <li>Delta base - encoded as signed varint</li>
+ <li>Delta values $W * (L - 2)$ bytes - encode each delta after the first
+one. If the delta base is positive, the sequence is increasing and if it is
+negative the sequence is decreasing.</li>
+</ul>
+
+<p>The unsigned sequence of [2, 3, 5, 7, 11, 13, 17, 19, 23, 29] would be
+serialized with delta encoding (3), a width of 4 bits (3), length of
+10 (9), a base of 2 (2), and first delta of 1 (2). The resulting
+sequence is [0xc6, 0x09, 0x02, 0x02, 0x22, 0x42, 0x42, 0x46].</p>
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+
+
+ <div class="unit four-fifths">
+ <article>
+ <h1>Indexes</h1>
+ <h1 id="row-group-index">Row Group Index</h1>
+
+<p>The row group indexes consist of a ROW_INDEX stream for each primitive
+column that has an entry for each row group. Row groups are controlled
+by the writer and default to 10,000 rows. Each RowIndexEntry gives the
+position of each stream for the column and the statistics for that row
+group.</p>
+
+<p>The index streams are placed at the front of the stripe, because in
+the default case of streaming they do not need to be read. They are
+only loaded when either predicate push down is being used or the
+reader seeks to a particular row.</p>
+
+<p><code>message RowIndexEntry {
+ repeated uint64 positions = 1 [packed=true];
+ optional ColumnStatistics statistics = 2;
+}
+</code></p>
+
+<p><code>message RowIndex {
+ repeated RowIndexEntry entry = 1;
+}
+</code></p>
+
+<p>To record positions, each stream needs a sequence of numbers. For
+uncompressed streams, the position is the byte offset of the RLE run’s
+start location followed by the number of values that need to be
+consumed from the run. In compressed streams, the first number is the
+start of the compression chunk in the stream, followed by the number
+of decompressed bytes that need to be consumed, and finally the number
+of values consumed in the RLE.</p>
+
+<p>For columns with multiple streams, the sequences of positions in each
+stream are concatenated. That was an unfortunate decision on my part
+that we should fix at some point, because it makes code that uses the
+indexes error-prone.</p>
+
+<p>Because dictionaries are accessed randomly, there is not a position to
+record for the dictionary and the entire dictionary must be read even
+if only part of a stripe is being read.</p>
+
+<h1 id="bloom-filter-index">Bloom Filter Index</h1>
+
+<p>Bloom Filters are added to ORC indexes from Hive 1.2.0 onwards.
+Predicate pushdown can make use of bloom filters to better prune
+the row groups that do not satisfy the filter condition.
+The bloom filter indexes consist of a BLOOM_FILTER stream for each
+column specified through ‘orc.bloom.filter.columns’ table properties.
+A BLOOM_FILTER stream records a bloom filter entry for each row
+group (default to 10,000 rows) in a column. Only the row groups that
+satisfy min/max row index evaluation will be evaluated against the
+bloom filter index.</p>
+
+<p>Each BloomFilterEntry stores the number of hash functions (‘k’) used and
+the bitset backing the bloom filter. The bitset is serialized as repeated
+longs from which the number of bits (‘m’) for the bloom filter can be derived.
+m = bitset.length * 64.</p>
+
+<p><code>message BloomFilter {
+ optional uint32 numHashFunctions = 1;
+ repeated fixed64 bitset = 2;
+}
+</code></p>
+
+<p><code>message BloomFilterIndex {
+ repeated BloomFilter bloomFilter = 1;
+}
+</code></p>
+
+<p>Bloom filter internally uses two different hash functions to map a key
+to a position in the bit set. For tinyint, smallint, int, bigint, float
+and double types, Thomas Wang’s 64-bit integer hash function is used.
+Floats are converted to IEEE-754 32 bit representation
+(using Java’s Float.floatToIntBits(float)). Similary, Doubles are
+converted to IEEE-754 64 bit representation (using Java’s
+Double.doubleToLongBits(double)). All these primitive types
+are cast to long base type before being passed on to the hash function.
+For strings and binary types, Murmur3 64 bit hash algorithm is used.
+The 64 bit variant of Murmur3 considers only the most significant
+8 bytes of Murmur3 128-bit algorithm. The 64 bit hashcode generated
+from the above algorithms is used as a base to derive ‘k’ different
+hash functions. We use the idea mentioned in the paper “Less Hashing,
+Same Performance: Building a Better Bloom Filter” by Kirsch et. al. to
+quickly compute the k hashcodes.</p>
+
+<p>The algorithm for computing k hashcodes and setting the bit position
+in a bloom filter is as follows:</p>
+
+<ol>
+ <li>Get 64 bit base hash code from Murmur3 or Thomas Wang’s hash algorithm.</li>
+ <li>Split the above hashcode into two 32-bit hashcodes (say hash1 and hash2).</li>
+ <li>k’th hashcode is obtained by (where k > 0):
+ <ul>
+ <li>combinedHash = hash1 + (k * hash2)</li>
+ </ul>
+ </li>
+ <li>If combinedHash is negative flip all the bits:
+ <ul>
+ <li>combinedHash = ~combinedHash</li>
+ </ul>
+ </li>
+ <li>Bit set position is obtained by performing modulo with m:
+ <ul>
+ <li>position = combinedHash % m</li>
+ </ul>
+ </li>
+ <li>Set the position in bit set. The LSB 6 bits identifies the long index
+within bitset and bit position within the long uses little endian order.
+ <ul>
+ <li>bitset[position »> 6] |= (1L « position);</li>
+ </ul>
+ </li>
+</ol>
+
+<p>Bloom filter streams are interlaced with row group indexes. This placement
+makes it convenient to read the bloom filter stream and row index stream
+together in single read operation.</p>
+
+<p><img src="/img/BloomFilter.png" alt="bloom filter" /></p>
+
+
+
+
+
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+
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+ <aside>
+
+ <h4>Overview</h4>
+
+
+<ul>
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+ <li class=""><a href="/docs/hive-config.html">Hive Configuration</a></li>
+
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+</ul>
+
+
+ <h4>Format Specification</h4>
+
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+
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+ <footer role="contentinfo">
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+
+
+ <div class="unit four-fifths">
+ <article>
+ <h1>Introduction</h1>
+ <p>Hive’s RCFile was the standard format for storing tabular data in
+Hadoop for several years. However, RCFile has limitations because it
+treats each column as a binary blob without semantics. In Hive 0.11 we
+added a new file format named Optimized Row Columnar (ORC) file that
+uses and retains the type information from the table definition. ORC
+uses type specific readers and writers that provide light weight
+compression techniques such as dictionary encoding, bit packing, delta
+encoding, and run length encoding – resulting in dramatically smaller
+files. Additionally, ORC can apply generic compression using zlib, or
+Snappy on top of the lightweight compression for even smaller
+files. However, storage savings are only part of the gain. ORC
+supports projection, which selects subsets of the columns for reading,
+so that queries reading only one column read only the required
+bytes. Furthermore, ORC files include light weight indexes that
+include the minimum and maximum values for each column in each set of
+10,000 rows and the entire file. Using pushdown filters from Hive, the
+file reader can skip entire sets of rows that aren’t important for
+this query.</p>
+
+<p><img src="/img/OrcFileLayout.png" alt="ORC file structure" /></p>
+
+
+
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+ </div>
+ <div class="clear"></div>
+
+
+ </article>
+ </div>
+
+ <div class="unit one-fifth hide-on-mobiles">
+ <aside>
+
+ <h4>Overview</h4>
+
+
+<ul>
+
+
+
+
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+ <h4>Hive Usage</h4>
+
+
+<ul>
+
+
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+
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+
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+
+ <li class=""><a href="/docs/hive-ddl.html">Hive DDL</a></li>
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+ <li class=""><a href="/docs/hive-config.html">Hive Configuration</a></li>
+
+
+
+</ul>
+
+
+ <h4>Format Specification</h4>
+
+
+<ul>
+
+
+
+
+
+
+
+
+
+
+
+
+
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+
+
+ <li class="current"><a href="/docs/spec-intro.html">Introduction</a></li>
+
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+ <li class=""><a href="/docs/file-tail.html">File Tail</a></li>
+
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+
+ <li class=""><a href="/docs/compression.html">Compression</a></li>
+
+
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+
+
+
+
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+
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+
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+
+
+
+
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+ <li class=""><a href="/docs/run-length.html">Run Length Encoding</a></li>
+
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+ <li class=""><a href="/docs/stripes.html">Stripes</a></li>
+
+
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+
+
+
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+
+
+ <li class=""><a href="/docs/encodings.html">Column Encodings</a></li>
+
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+
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+</ul>
+
+
+ </aside>
+</div>
+
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+ <div class="clear"></div>
+
+ </div>
+ </section>
+
+
+ <footer role="contentinfo">
+ <p>The contents of this website are © 2015
+ <a href="https://www.apache.org/">Apache Software Foundation</a>
+ under the terms of the <a
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+</footer>
+
+ <script>
+ var anchorForId = function (id) {
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+ };
+</script>
+
+
+</body>
+</html>
[3/8] orc git commit: Publish first version of site.
Posted by om...@apache.org.
http://git-wip-us.apache.org/repos/asf/orc/blob/6a400548/docs/stripes.html
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diff --git a/docs/stripes.html b/docs/stripes.html
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+<!DOCTYPE HTML>
+<html lang="en-US">
+<head>
+ <meta charset="UTF-8">
+ <title>Stripes</title>
+ <meta name="viewport" content="width=device-width,initial-scale=1">
+ <meta name="generator" content="Jekyll v2.4.0">
+ <link rel="stylesheet" href="//fonts.googleapis.com/css?family=Lato:300,300italic,400,400italic,700,700italic,900">
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+ <!--[if lt IE 9]>
+ <script src="/js/html5shiv.min.js"></script>
+ <script src="/js/respond.min.js"></script>
+ <![endif]-->
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+ <header role="banner">
+ <nav class="mobile-nav show-on-mobiles">
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+ <a href="/">Home</a>
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+ </li>
+ <li class="">
+ <a href="/develop/">Develop</a>
+ </li>
+</ul>
+
+ </nav>
+ <div class="grid">
+ <div class="unit one-third center-on-mobiles">
+ <h1>
+ <a href="/">
+ <span class="sr-only">Apache ORC</span>
+ <img src="/img/logo.png" width="249" height="115" alt="ORC Logo">
+ </a>
+ </h1>
+ </div>
+ <nav class="main-nav unit two-thirds hide-on-mobiles">
+ <ul>
+ <li class="">
+ <a href="/">Home</a>
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+ <a href="/docs/">Documentation</a>
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+ <li class="">
+ <a href="/news/">News</a>
+ </li>
+ <li class="">
+ <a href="/help/">Help</a>
+ </li>
+ <li class="">
+ <a href="/develop/">Develop</a>
+ </li>
+</ul>
+
+ </nav>
+ </div>
+</header>
+
+
+ <section class="docs">
+ <div class="grid">
+
+ <div class="docs-nav-mobile unit whole show-on-mobiles">
+ <select onchange="if (this.value) window.location.href=this.value">
+ <option value="">Navigate the docs…</option>
+
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+
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+ <option value="/docs/types.html">Types</option>
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+ </optgroup>
+
+ <optgroup label="Hive Usage">
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+ <option value="/docs/hive-config.html">Hive Configuration</option>
+
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+ </optgroup>
+
+ <optgroup label="Format Specification">
+
+
+
+
+
+
+
+
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+
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+
+
+ <option value="/docs/spec-intro.html">Introduction</option>
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+ <option value="/docs/file-tail.html">File Tail</option>
+
+
+
+
+
+
+
+
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+
+
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+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+ <option value="/docs/compression.html">Compression</option>
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
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+
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+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+ <option value="/docs/run-length.html">Run Length Encoding</option>
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+ <option value="/docs/stripes.html">Stripes</option>
+
+
+
+
+
+
+
+
+
+
+
+
+
+ <option value="/docs/encodings.html">Column Encodings</option>
+
+
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+
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+
+
+
+
+
+
+ <option value="/docs/spec-index.html">Indexes</option>
+
+
+
+
+
+
+
+
+
+
+ </optgroup>
+
+ </select>
+</div>
+
+
+ <div class="unit four-fifths">
+ <article>
+ <h1>Stripes</h1>
+ <p>The body of ORC files consists of a series of stripes. Stripes are
+large (typically ~200MB) and independent of each other and are often
+processed by different tasks. The defining characteristic for columnar
+storage formats is that the data for each column is stored separately
+and that reading data out of the file should be proportional to the
+number of columns read.</p>
+
+<p>In ORC files, each column is stored in several streams that are stored
+next to each other in the file. For example, an integer column is
+represented as two streams PRESENT, which uses one with a bit per
+value recording if the value is non-null, and DATA, which records the
+non-null values. If all of a column’s values in a stripe are non-null,
+the PRESENT stream is omitted from the stripe. For binary data, ORC
+uses three streams PRESENT, DATA, and LENGTH, which stores the length
+of each value. The details of each type will be presented in the
+following subsections.</p>
+
+<h1 id="stripe-footer">Stripe Footer</h1>
+
+<p>The stripe footer contains the encoding of each column and the
+directory of the streams including their location.</p>
+
+<p><code>message StripeFooter {
+ // the location of each stream
+ repeated Stream streams = 1;
+ // the encoding of each column
+ repeated ColumnEncoding columns = 2;
+}
+</code></p>
+
+<p>To describe each stream, ORC stores the kind of stream, the column id,
+and the stream’s size in bytes. The details of what is stored in each stream
+depends on the type and encoding of the column.</p>
+
+<p><code>message Stream {
+ enum Kind {
+ // boolean stream of whether the next value is non-null
+ PRESENT = 0;
+ // the primary data stream
+ DATA = 1;
+ // the length of each value for variable length data
+ LENGTH = 2;
+ // the dictionary blob
+ DICTIONARY\_DATA = 3;
+ // deprecated prior to Hive 0.11
+ // It was used to store the number of instances of each value in the
+ // dictionary
+ DICTIONARY_COUNT = 4;
+ // a secondary data stream
+ SECONDARY = 5;
+ // the index for seeking to particular row groups
+ ROW_INDEX = 6;
+ }
+ required Kind kind = 1;
+ // the column id
+ optional uint32 column = 2;
+ // the number of bytes in the file
+ optional uint64 length = 3;
+}
+</code></p>
+
+<p>Depending on their type several options for encoding are possible. The
+encodings are divided into direct or dictionary-based categories and
+further refined as to whether they use RLE v1 or v2.</p>
+
+<p><code>message ColumnEncoding {
+ enum Kind {
+ // the encoding is mapped directly to the stream using RLE v1
+ DIRECT = 0;
+ // the encoding uses a dictionary of unique values using RLE v1
+ DICTIONARY = 1;
+ // the encoding is direct using RLE v2
+ DIRECT\_V2 = 2;
+ // the encoding is dictionary-based using RLE v2
+ DICTIONARY\_V2 = 3;
+ }
+ required Kind kind = 1;
+ // for dictionary encodings, record the size of the dictionary
+ optional uint32 dictionarySize = 2;
+}
+</code></p>
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+ <div class="section-nav">
+ <div class="left align-right">
+
+
+
+ <a href="/docs/run-length.html" class="prev">Back</a>
+
+ </div>
+ <div class="right align-left">
+
+
+
+ <a href="/docs/encodings.html" class="next">Next</a>
+
+ </div>
+ </div>
+ <div class="clear"></div>
+
+
+ </article>
+ </div>
+
+ <div class="unit one-fifth hide-on-mobiles">
+ <aside>
+
+ <h4>Overview</h4>
+
+
+<ul>
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+ <li class=""><a href="/docs/index.html">Background</a></li>
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+ <li class=""><a href="/docs/types.html">Types</a></li>
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+ <li class=""><a href="/docs/indexes.html">Indexes</a></li>
+
+
+
+
+
+
+
+
+
+
+
+ <li class=""><a href="/docs/acid.html">ACID support</a></li>
+
+
+
+</ul>
+
+
+ <h4>Hive Usage</h4>
+
+
+<ul>
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+ <li class=""><a href="/docs/hive-ddl.html">Hive DDL</a></li>
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+ <li class=""><a href="/docs/hive-config.html">Hive Configuration</a></li>
+
+
+
+</ul>
+
+
+ <h4>Format Specification</h4>
+
+
+<ul>
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+ <li class=""><a href="/docs/spec-intro.html">Introduction</a></li>
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+ <li class=""><a href="/docs/file-tail.html">File Tail</a></li>
+
+
+
+
+
+
+
+
+
+
+
+
+
+ <li class=""><a href="/docs/compression.html">Compression</a></li>
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+ <li class=""><a href="/docs/run-length.html">Run Length Encoding</a></li>
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+ <li class="current"><a href="/docs/stripes.html">Stripes</a></li>
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+ <li class=""><a href="/docs/encodings.html">Column Encodings</a></li>
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+ <li class=""><a href="/docs/spec-index.html">Indexes</a></li>
+
+
+
+</ul>
+
+
+ </aside>
+</div>
+
+
+ <div class="clear"></div>
+
+ </div>
+ </section>
+
+
+ <footer role="contentinfo">
+ <p>The contents of this website are © 2015
+ <a href="https://www.apache.org/">Apache Software Foundation</a>
+ under the terms of the <a
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+</html>
http://git-wip-us.apache.org/repos/asf/orc/blob/6a400548/docs/types.html
----------------------------------------------------------------------
diff --git a/docs/types.html b/docs/types.html
new file mode 100644
index 0000000..4535269
--- /dev/null
+++ b/docs/types.html
@@ -0,0 +1,1035 @@
+<!DOCTYPE HTML>
+<html lang="en-US">
+<head>
+ <meta charset="UTF-8">
+ <title>Types</title>
+ <meta name="viewport" content="width=device-width,initial-scale=1">
+ <meta name="generator" content="Jekyll v2.4.0">
+ <link rel="stylesheet" href="//fonts.googleapis.com/css?family=Lato:300,300italic,400,400italic,700,700italic,900">
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+ <link rel="icon" type="image/x-icon" href="/favicon.ico">
+ <!--[if lt IE 9]>
+ <script src="/js/html5shiv.min.js"></script>
+ <script src="/js/respond.min.js"></script>
+ <![endif]-->
+</head>
+
+
+<body class="wrap">
+ <header role="banner">
+ <nav class="mobile-nav show-on-mobiles">
+ <ul>
+ <li class="">
+ <a href="/">Home</a>
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+ </li>
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+ </li>
+ <li class="">
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+ </li>
+ <li class="">
+ <a href="/develop/">Develop</a>
+ </li>
+</ul>
+
+ </nav>
+ <div class="grid">
+ <div class="unit one-third center-on-mobiles">
+ <h1>
+ <a href="/">
+ <span class="sr-only">Apache ORC</span>
+ <img src="/img/logo.png" width="249" height="115" alt="ORC Logo">
+ </a>
+ </h1>
+ </div>
+ <nav class="main-nav unit two-thirds hide-on-mobiles">
+ <ul>
+ <li class="">
+ <a href="/">Home</a>
+ </li>
+ <li class="current">
+ <a href="/docs/">Documentation</a>
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+ </li>
+ <li class="">
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+ </li>
+ <li class="">
+ <a href="/develop/">Develop</a>
+ </li>
+</ul>
+
+ </nav>
+ </div>
+</header>
+
+
+ <section class="docs">
+ <div class="grid">
+
+ <div class="docs-nav-mobile unit whole show-on-mobiles">
+ <select onchange="if (this.value) window.location.href=this.value">
+ <option value="">Navigate the docs…</option>
+
+ <optgroup label="Overview">
+
+
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+
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+
+
+ <option value="/docs/index.html">Background</option>
+
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+
+
+
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+
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+
+
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+
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+
+
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+
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+
+ <option value="/docs/types.html">Types</option>
+
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+ <option value="/docs/indexes.html">Indexes</option>
+
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+
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+
+
+
+
+
+
+
+
+
+ </optgroup>
+
+ <optgroup label="Hive Usage">
+
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+
+ <option value="/docs/hive-ddl.html">Hive DDL</option>
+
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+
+
+
+
+
+
+ <option value="/docs/hive-config.html">Hive Configuration</option>
+
+
+
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+
+
+
+
+
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+
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+
+
+
+
+ </optgroup>
+
+ <optgroup label="Format Specification">
+
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+
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+
+
+ <option value="/docs/spec-intro.html">Introduction</option>
+
+
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+
+
+
+
+
+
+
+
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+
+
+
+
+
+ <option value="/docs/file-tail.html">File Tail</option>
+
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+
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+
+ <option value="/docs/run-length.html">Run Length Encoding</option>
+
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+
+
+
+
+
+ <option value="/docs/stripes.html">Stripes</option>
+
+
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+
+ <option value="/docs/encodings.html">Column Encodings</option>
+
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+
+
+
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+
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+
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+
+
+
+
+
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+
+ <option value="/docs/spec-index.html">Indexes</option>
+
+
+
+
+
+
+
+
+
+
+ </optgroup>
+
+ </select>
+</div>
+
+
+ <div class="unit four-fifths">
+ <article>
+ <h1>Types</h1>
+ <p>ORC files are completely self-describing and do not depend on the Hive
+Metastore or any other external metadata. The file includes all of the
+type and encoding information for the objects stored in the file. Because the
+file is self-contained, it does not depend on the user’s environment to
+correctly interpret the file’s contents.</p>
+
+<p>ORC provides a rich set of scalar and compound types:</p>
+
+<ul>
+ <li>Integer
+ <ul>
+ <li>boolean (1 bit)</li>
+ <li>tinyint (8 bit)</li>
+ <li>smallint (16 bit)</li>
+ <li>int (32 bit)</li>
+ <li>bigint (64 bit)</li>
+ </ul>
+ </li>
+ <li>Floating point
+ <ul>
+ <li>float</li>
+ <li>double</li>
+ </ul>
+ </li>
+ <li>String types
+ <ul>
+ <li>string</li>
+ <li>char</li>
+ <li>varchar</li>
+ </ul>
+ </li>
+ <li>Binary blobs
+ <ul>
+ <li>binary</li>
+ </ul>
+ </li>
+ <li>Date/time
+ <ul>
+ <li>timestamp</li>
+ <li>date</li>
+ </ul>
+ </li>
+ <li>Compound types
+ <ul>
+ <li>struct</li>
+ <li>list</li>
+ <li>map</li>
+ <li>union</li>
+ </ul>
+ </li>
+</ul>
+
+<p>All ORC file are logically sequences of identically typed objects. Hive
+always uses a struct with a field for each of the top-level columns as
+the root object type, but that is not required. All types in ORC can take
+null values including the compound types.</p>
+
+<p>Compound types have children columns that hold the values for their
+sub-elements. For example, a struct column has one child column for
+each field of the struct. Lists always have a single child column for
+the element values and maps always have two child columns. Union
+columns have one child column for each of the variants.</p>
+
+<p>Given the following definition of the table Foobar, the columns in the
+file would form the given tree.</p>
+
+<p><code>create table Foobar (
+ myInt int,
+ myMap map<string,
+ struct<myString : string,
+ myDouble: double>>,
+ myTime timestamp
+);
+</code></p>
+
+<p><img src="/img/TreeWriters.png" alt="ORC column structure" /></p>
+
+
+
+
+
+
+
+
+
+
+
+
+
+ <div class="section-nav">
+ <div class="left align-right">
+
+
+
+ <a href="/docs/index.html" class="prev">Back</a>
+
+ </div>
+ <div class="right align-left">
+
+
+
+ <a href="/docs/indexes.html" class="next">Next</a>
+
+ </div>
+ </div>
+ <div class="clear"></div>
+
+
+ </article>
+ </div>
+
+ <div class="unit one-fifth hide-on-mobiles">
+ <aside>
+
+ <h4>Overview</h4>
+
+
+<ul>
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+ <li class=""><a href="/docs/index.html">Background</a></li>
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+ <li class="current"><a href="/docs/types.html">Types</a></li>
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+ <li class=""><a href="/docs/indexes.html">Indexes</a></li>
+
+
+
+
+
+
+
+
+
+
+
+ <li class=""><a href="/docs/acid.html">ACID support</a></li>
+
+
+
+</ul>
+
+
+ <h4>Hive Usage</h4>
+
+
+<ul>
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+ <li class=""><a href="/docs/hive-ddl.html">Hive DDL</a></li>
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+ <li class=""><a href="/docs/hive-config.html">Hive Configuration</a></li>
+
+
+
+</ul>
+
+
+ <h4>Format Specification</h4>
+
+
+<ul>
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+ <li class=""><a href="/docs/spec-intro.html">Introduction</a></li>
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+ <li class=""><a href="/docs/file-tail.html">File Tail</a></li>
+
+
+
+
+
+
+
+
+
+
+
+
+
+ <li class=""><a href="/docs/compression.html">Compression</a></li>
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+ <li class=""><a href="/docs/run-length.html">Run Length Encoding</a></li>
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+ <li class=""><a href="/docs/stripes.html">Stripes</a></li>
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+ <li class=""><a href="/docs/encodings.html">Column Encodings</a></li>
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+ <li class=""><a href="/docs/spec-index.html">Indexes</a></li>
+
+
+
+</ul>
+
+
+ </aside>
+</div>
+
+
+ <div class="clear"></div>
+
+ </div>
+ </section>
+
+
+ <footer role="contentinfo">
+ <p>The contents of this website are © 2015
+ <a href="https://www.apache.org/">Apache Software Foundation</a>
+ under the terms of the <a
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+ Apache License v2</a>. Apache ORC and its logo are trademarks
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+</footer>
+
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+
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+</html>
http://git-wip-us.apache.org/repos/asf/orc/blob/6a400548/downloads/index.html
----------------------------------------------------------------------
diff --git a/downloads/index.html b/downloads/index.html
new file mode 100644
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--- /dev/null
+++ b/downloads/index.html
@@ -0,0 +1,142 @@
+<!DOCTYPE HTML>
+<html lang="en-US">
+<head>
+ <meta charset="UTF-8">
+ <title>Downloads</title>
+ <meta name="viewport" content="width=device-width,initial-scale=1">
+ <meta name="generator" content="Jekyll v2.4.0">
+ <link rel="stylesheet" href="//fonts.googleapis.com/css?family=Lato:300,300italic,400,400italic,700,700italic,900">
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+ <!--[if lt IE 9]>
+ <script src="/js/html5shiv.min.js"></script>
+ <script src="/js/respond.min.js"></script>
+ <![endif]-->
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+ <nav class="mobile-nav show-on-mobiles">
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+ </li>
+ <li class="">
+ <a href="/develop/">Develop</a>
+ </li>
+</ul>
+
+ </nav>
+ <div class="grid">
+ <div class="unit one-third center-on-mobiles">
+ <h1>
+ <a href="/">
+ <span class="sr-only">Apache ORC</span>
+ <img src="/img/logo.png" width="249" height="115" alt="ORC Logo">
+ </a>
+ </h1>
+ </div>
+ <nav class="main-nav unit two-thirds hide-on-mobiles">
+ <ul>
+ <li class="">
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+
+ </nav>
+ </div>
+</header>
+
+
+ <section class="standalone">
+ <div class="grid">
+
+ <div class="unit whole">
+ <article>
+ <h1>Downloads</h1>
+ <p>We haven’t made any releases as a separate project yet. Please download
+the Hive 1.1 release and use the hive-exec.jar.</p>
+
+ </article>
+ </div>
+
+ <div class="clear"></div>
+
+ </div>
+</section>
+
+
+ <footer role="contentinfo">
+ <p>The contents of this website are © 2015
+ <a href="https://www.apache.org/">Apache Software Foundation</a>
+ under the terms of the <a
+ href="https://www.apache.org/licenses/LICENSE-2.0.html">
+ Apache License v2</a>. Apache ORC and its logo are trademarks
+ of the Apache Software Foundation.</p>
+</footer>
+
+ <script>
+ var anchorForId = function (id) {
+ var anchor = document.createElement("a");
+ anchor.className = "header-link";
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+ var header = headers[h];
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+ }
+ }
+ };
+
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+ if (this.readyState === "complete") {
+ var contentBlock = document.getElementsByClassName("docs")[0] || document.getElementsByClassName("news")[0];
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+ }
+ }
+ };
+</script>
+
+
+</body>
+</html>
http://git-wip-us.apache.org/repos/asf/orc/blob/6a400548/favicon.ico
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http://git-wip-us.apache.org/repos/asf/orc/blob/6a400548/fonts/fontawesome-webfont.eot
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[5/8] orc git commit: Publish first version of site.
Posted by om...@apache.org.
http://git-wip-us.apache.org/repos/asf/orc/blob/6a400548/docs/compression.html
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diff --git a/docs/compression.html b/docs/compression.html
new file mode 100644
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--- /dev/null
+++ b/docs/compression.html
@@ -0,0 +1,1005 @@
+<!DOCTYPE HTML>
+<html lang="en-US">
+<head>
+ <meta charset="UTF-8">
+ <title>Compression</title>
+ <meta name="viewport" content="width=device-width,initial-scale=1">
+ <meta name="generator" content="Jekyll v2.4.0">
+ <link rel="stylesheet" href="//fonts.googleapis.com/css?family=Lato:300,300italic,400,400italic,700,700italic,900">
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+ <!--[if lt IE 9]>
+ <script src="/js/html5shiv.min.js"></script>
+ <script src="/js/respond.min.js"></script>
+ <![endif]-->
+</head>
+
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+<body class="wrap">
+ <header role="banner">
+ <nav class="mobile-nav show-on-mobiles">
+ <ul>
+ <li class="">
+ <a href="/">Home</a>
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+ </li>
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+ <li class="">
+ <a href="/news/">News</a>
+ </li>
+ <li class="">
+ <a href="/help/">Help</a>
+ </li>
+ <li class="">
+ <a href="/develop/">Develop</a>
+ </li>
+</ul>
+
+ </nav>
+ <div class="grid">
+ <div class="unit one-third center-on-mobiles">
+ <h1>
+ <a href="/">
+ <span class="sr-only">Apache ORC</span>
+ <img src="/img/logo.png" width="249" height="115" alt="ORC Logo">
+ </a>
+ </h1>
+ </div>
+ <nav class="main-nav unit two-thirds hide-on-mobiles">
+ <ul>
+ <li class="">
+ <a href="/">Home</a>
+ </li>
+ <li class="current">
+ <a href="/docs/">Documentation</a>
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+ </li>
+ <li class="">
+ <a href="/news/">News</a>
+ </li>
+ <li class="">
+ <a href="/help/">Help</a>
+ </li>
+ <li class="">
+ <a href="/develop/">Develop</a>
+ </li>
+</ul>
+
+ </nav>
+ </div>
+</header>
+
+
+ <section class="docs">
+ <div class="grid">
+
+ <div class="docs-nav-mobile unit whole show-on-mobiles">
+ <select onchange="if (this.value) window.location.href=this.value">
+ <option value="">Navigate the docs…</option>
+
+ <optgroup label="Overview">
+
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+
+ <option value="/docs/index.html">Background</option>
+
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+
+
+
+
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+
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+
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+
+
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+
+
+
+
+
+
+ <option value="/docs/types.html">Types</option>
+
+
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+
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+ <option value="/docs/indexes.html">Indexes</option>
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+
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+
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+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+ </optgroup>
+
+ <optgroup label="Hive Usage">
+
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+
+
+
+
+
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+
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+
+
+
+
+
+ <option value="/docs/hive-ddl.html">Hive DDL</option>
+
+
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+
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+
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+
+
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+
+
+
+
+
+
+
+ <option value="/docs/hive-config.html">Hive Configuration</option>
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+ </optgroup>
+
+ <optgroup label="Format Specification">
+
+
+
+
+
+
+
+
+
+
+
+
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+
+
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+
+
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+
+
+
+
+
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+
+
+ <option value="/docs/spec-intro.html">Introduction</option>
+
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+</div>
+
+
+ <div class="unit four-fifths">
+ <article>
+ <h1>Compression</h1>
+ <p>If the ORC file writer selects a generic compression codec (zlib or
+snappy), every part of the ORC file except for the Postscript is
+compressed with that codec. However, one of the requirements for ORC
+is that the reader be able to skip over compressed bytes without
+decompressing the entire stream. To manage this, ORC writes compressed
+streams in chunks with headers as in the figure below.
+To handle uncompressable data, if the compressed data is larger than
+the original, the original is stored and the isOriginal flag is
+set. Each header is 3 bytes long with (compressedLength * 2 +
+isOriginal) stored as a little endian value. For example, the header
+for a chunk that compressed to 100,000 bytes would be [0x40, 0x0d,
+0x03]. The header for 5 bytes that did not compress would be [0x0b,
+0x00, 0x00]. Each compression chunk is compressed independently so
+that as long as a decompressor starts at the top of a header, it can
+start decompressing without the previous bytes.</p>
+
+<p><img src="/img/CompressionStream.png" alt="compression streams" /></p>
+
+<p>The default compression chunk size is 256K, but writers can choose
+their own value less than 223. Larger chunks lead to better
+compression, but require more memory. The chunk size is recorded in
+the Postscript so that readers can allocate appropriately sized
+buffers.</p>
+
+<p>ORC files without generic compression write each stream directly
+with no headers.</p>
+
+
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+ <h4>Overview</h4>
+
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+ <li class=""><a href="/docs/hive-config.html">Hive Configuration</a></li>
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+</ul>
+
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+ <h4>Format Specification</h4>
+
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+<ul>
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http://git-wip-us.apache.org/repos/asf/orc/blob/6a400548/docs/encodings.html
----------------------------------------------------------------------
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@@ -0,0 +1,1600 @@
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+<html lang="en-US">
+<head>
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+ <div class="unit one-third center-on-mobiles">
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+ <a href="/">
+ <span class="sr-only">Apache ORC</span>
+ <img src="/img/logo.png" width="249" height="115" alt="ORC Logo">
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+ </optgroup>
+
+ </select>
+</div>
+
+
+ <div class="unit four-fifths">
+ <article>
+ <h1>Column Encodings</h1>
+ <h2 id="smallint-int-and-bigint-columns">SmallInt, Int, and BigInt Columns</h2>
+
+<p>All of the 16, 32, and 64 bit integer column types use the same set of
+potential encodings, which is basically whether they use RLE v1 or
+v2. If the PRESENT stream is not included, all of the values are
+present. For values that have false bits in the present stream, no
+values are included in the data stream.</p>
+
+<table>
+ <thead>
+ <tr>
+ <th style="text-align: left">Encoding</th>
+ <th style="text-align: left">Stream Kind</th>
+ <th style="text-align: left">Optional</th>
+ <th style="text-align: left">Contents</th>
+ </tr>
+ </thead>
+ <tbody>
+ <tr>
+ <td style="text-align: left">DIRECT</td>
+ <td style="text-align: left">PRESENT</td>
+ <td style="text-align: left">Yes</td>
+ <td style="text-align: left">Boolean RLE</td>
+ </tr>
+ <tr>
+ <td style="text-align: left"> </td>
+ <td style="text-align: left">DATA</td>
+ <td style="text-align: left">No</td>
+ <td style="text-align: left">Signed Integer RLE v1</td>
+ </tr>
+ <tr>
+ <td style="text-align: left">DIRECT_V2</td>
+ <td style="text-align: left">PRESENT</td>
+ <td style="text-align: left">Yes</td>
+ <td style="text-align: left">Boolean RLE</td>
+ </tr>
+ <tr>
+ <td style="text-align: left"> </td>
+ <td style="text-align: left">DATA</td>
+ <td style="text-align: left">No</td>
+ <td style="text-align: left">Signed Integer RLE v2</td>
+ </tr>
+ </tbody>
+</table>
+
+<h2 id="float-and-double-columns">Float and Double Columns</h2>
+
+<p>Floating point types are stored using IEEE 754 floating point bit
+layout. Float columns use 4 bytes per value and double columns use 8
+bytes.</p>
+
+<table>
+ <thead>
+ <tr>
+ <th style="text-align: left">Encoding</th>
+ <th style="text-align: left">Stream Kind</th>
+ <th style="text-align: left">Optional</th>
+ <th style="text-align: left">Contents</th>
+ </tr>
+ </thead>
+ <tbody>
+ <tr>
+ <td style="text-align: left">DIRECT</td>
+ <td style="text-align: left">PRESENT</td>
+ <td style="text-align: left">Yes</td>
+ <td style="text-align: left">Boolean RLE</td>
+ </tr>
+ <tr>
+ <td style="text-align: left"> </td>
+ <td style="text-align: left">DATA</td>
+ <td style="text-align: left">No</td>
+ <td style="text-align: left">IEEE 754 floating point representation</td>
+ </tr>
+ </tbody>
+</table>
+
+<h2 id="string-char-and-varchar-columns">String, Char, and VarChar Columns</h2>
+
+<p>String columns are adaptively encoded based on whether the first
+10,000 values are sufficiently distinct. In all of the encodings, the
+PRESENT stream encodes whether the value is null.</p>
+
+<p>For direct encoding the UTF-8 bytes are saved in the DATA stream and
+the length of each value is written into the LENGTH stream. In direct
+encoding, if the values were [“Nevada”, “California”]; the DATA
+would be “NevadaCalifornia” and the LENGTH would be [6, 10].</p>
+
+<p>For dictionary encodings the dictionary is sorted and UTF-8 bytes of
+each unique value are placed into DICTIONARY_DATA. The length of each
+item in the dictionary is put into the LENGTH stream. The DATA stream
+consists of the sequence of references to the dictionary elements.</p>
+
+<p>In dictionary encoding, if the values were [“Nevada”,
+“California”, “Nevada”, “California”, and “Florida”]; the
+DICTIONARY_DATA would be “CaliforniaFloridaNevada” and LENGTH would
+be [10, 7, 6]. The DATA would be [2, 0, 2, 0, 1].</p>
+
+<table>
+ <thead>
+ <tr>
+ <th style="text-align: left">Encoding</th>
+ <th style="text-align: left">Stream Kind</th>
+ <th style="text-align: left">Optional</th>
+ <th style="text-align: left">Contents</th>
+ </tr>
+ </thead>
+ <tbody>
+ <tr>
+ <td style="text-align: left">DIRECT</td>
+ <td style="text-align: left">PRESENT</td>
+ <td style="text-align: left">Yes</td>
+ <td style="text-align: left">Boolean RLE</td>
+ </tr>
+ <tr>
+ <td style="text-align: left"> </td>
+ <td style="text-align: left">DATA</td>
+ <td style="text-align: left">No</td>
+ <td style="text-align: left">String contents</td>
+ </tr>
+ <tr>
+ <td style="text-align: left"> </td>
+ <td style="text-align: left">LENGTH</td>
+ <td style="text-align: left">No</td>
+ <td style="text-align: left">Unsigned Integer RLE v1</td>
+ </tr>
+ <tr>
+ <td style="text-align: left">DICTIONARY</td>
+ <td style="text-align: left">PRESENT</td>
+ <td style="text-align: left">Yes</td>
+ <td style="text-align: left">Boolean RLE</td>
+ </tr>
+ <tr>
+ <td style="text-align: left"> </td>
+ <td style="text-align: left">DATA</td>
+ <td style="text-align: left">No</td>
+ <td style="text-align: left">Unsigned Integer RLE v1</td>
+ </tr>
+ <tr>
+ <td style="text-align: left"> </td>
+ <td style="text-align: left">DICTIONARY_DATA</td>
+ <td style="text-align: left">No</td>
+ <td style="text-align: left">String contents</td>
+ </tr>
+ <tr>
+ <td style="text-align: left"> </td>
+ <td style="text-align: left">LENGTH</td>
+ <td style="text-align: left">No</td>
+ <td style="text-align: left">Unsigned Integer RLE v1</td>
+ </tr>
+ <tr>
+ <td style="text-align: left">DIRECT_V2</td>
+ <td style="text-align: left">PRESENT</td>
+ <td style="text-align: left">Yes</td>
+ <td style="text-align: left">Boolean RLE</td>
+ </tr>
+ <tr>
+ <td style="text-align: left"> </td>
+ <td style="text-align: left">DATA</td>
+ <td style="text-align: left">No</td>
+ <td style="text-align: left">String contents</td>
+ </tr>
+ <tr>
+ <td style="text-align: left"> </td>
+ <td style="text-align: left">LENGTH</td>
+ <td style="text-align: left">No</td>
+ <td style="text-align: left">Unsigned Integer RLE v2</td>
+ </tr>
+ <tr>
+ <td style="text-align: left">DICTIONARY_V2</td>
+ <td style="text-align: left">PRESENT</td>
+ <td style="text-align: left">Yes</td>
+ <td style="text-align: left">Boolean RLE</td>
+ </tr>
+ <tr>
+ <td style="text-align: left"> </td>
+ <td style="text-align: left">DATA</td>
+ <td style="text-align: left">No</td>
+ <td style="text-align: left">Unsigned Integer RLE v2</td>
+ </tr>
+ <tr>
+ <td style="text-align: left"> </td>
+ <td style="text-align: left">DICTIONARY_DATA</td>
+ <td style="text-align: left">No</td>
+ <td style="text-align: left">String contents</td>
+ </tr>
+ <tr>
+ <td style="text-align: left"> </td>
+ <td style="text-align: left">LENGTH</td>
+ <td style="text-align: left">No</td>
+ <td style="text-align: left">Unsigned Integer RLE v2</td>
+ </tr>
+ </tbody>
+</table>
+
+<h2 id="boolean-columns">Boolean Columns</h2>
+
+<p>Boolean columns are rare, but have a simple encoding.</p>
+
+<table>
+ <thead>
+ <tr>
+ <th style="text-align: left">Encoding</th>
+ <th style="text-align: left">Stream Kind</th>
+ <th style="text-align: left">Optional</th>
+ <th style="text-align: left">Contents</th>
+ </tr>
+ </thead>
+ <tbody>
+ <tr>
+ <td style="text-align: left">DIRECT</td>
+ <td style="text-align: left">PRESENT</td>
+ <td style="text-align: left">Yes</td>
+ <td style="text-align: left">Boolean RLE</td>
+ </tr>
+ <tr>
+ <td style="text-align: left"> </td>
+ <td style="text-align: left">DATA</td>
+ <td style="text-align: left">No</td>
+ <td style="text-align: left">Boolean RLE</td>
+ </tr>
+ </tbody>
+</table>
+
+<h2 id="tinyint-columns">TinyInt Columns</h2>
+
+<p>TinyInt (byte) columns use byte run length encoding.</p>
+
+<table>
+ <thead>
+ <tr>
+ <th style="text-align: left">Encoding</th>
+ <th style="text-align: left">Stream Kind</th>
+ <th style="text-align: left">Optional</th>
+ <th style="text-align: left">Contents</th>
+ </tr>
+ </thead>
+ <tbody>
+ <tr>
+ <td style="text-align: left">DIRECT</td>
+ <td style="text-align: left">PRESENT</td>
+ <td style="text-align: left">Yes</td>
+ <td style="text-align: left">Boolean RLE</td>
+ </tr>
+ <tr>
+ <td style="text-align: left"> </td>
+ <td style="text-align: left">DATA</td>
+ <td style="text-align: left">No</td>
+ <td style="text-align: left">Byte RLE</td>
+ </tr>
+ </tbody>
+</table>
+
+<h2 id="binary-columns">Binary Columns</h2>
+
+<p>Binary data is encoded with a PRESENT stream, a DATA stream that records
+the contents, and a LENGTH stream that records the number of bytes per a
+value.</p>
+
+<table>
+ <thead>
+ <tr>
+ <th style="text-align: left">Encoding</th>
+ <th style="text-align: left">Stream Kind</th>
+ <th style="text-align: left">Optional</th>
+ <th style="text-align: left">Contents</th>
+ </tr>
+ </thead>
+ <tbody>
+ <tr>
+ <td style="text-align: left">DIRECT</td>
+ <td style="text-align: left">PRESENT</td>
+ <td style="text-align: left">Yes</td>
+ <td style="text-align: left">Boolean RLE</td>
+ </tr>
+ <tr>
+ <td style="text-align: left"> </td>
+ <td style="text-align: left">DATA</td>
+ <td style="text-align: left">No</td>
+ <td style="text-align: left">String contents</td>
+ </tr>
+ <tr>
+ <td style="text-align: left"> </td>
+ <td style="text-align: left">LENGTH</td>
+ <td style="text-align: left">No</td>
+ <td style="text-align: left">Unsigned Integer RLE v1</td>
+ </tr>
+ <tr>
+ <td style="text-align: left">DIRECT_V2</td>
+ <td style="text-align: left">PRESENT</td>
+ <td style="text-align: left">Yes</td>
+ <td style="text-align: left">Boolean RLE</td>
+ </tr>
+ <tr>
+ <td style="text-align: left"> </td>
+ <td style="text-align: left">DATA</td>
+ <td style="text-align: left">No</td>
+ <td style="text-align: left">String contents</td>
+ </tr>
+ <tr>
+ <td style="text-align: left"> </td>
+ <td style="text-align: left">LENGTH</td>
+ <td style="text-align: left">No</td>
+ <td style="text-align: left">Unsigned Integer RLE v2</td>
+ </tr>
+ </tbody>
+</table>
+
+<h2 id="decimal-columns">Decimal Columns</h2>
+
+<p>Decimal was introduced in Hive 0.11 with infinite precision (the total
+number of digits). In Hive 0.13, the definition was change to limit
+the precision to a maximum of 38 digits, which conveniently uses 127
+bits plus a sign bit. The current encoding of decimal columns stores
+the integer representation of the value as an unbounded length zigzag
+encoded base 128 varint. The scale is stored in the SECONDARY stream
+as an unsigned integer.</p>
+
+<table>
+ <thead>
+ <tr>
+ <th style="text-align: left">Encoding</th>
+ <th style="text-align: left">Stream Kind</th>
+ <th style="text-align: left">Optional</th>
+ <th style="text-align: left">Contents</th>
+ </tr>
+ </thead>
+ <tbody>
+ <tr>
+ <td style="text-align: left">DIRECT</td>
+ <td style="text-align: left">PRESENT</td>
+ <td style="text-align: left">Yes</td>
+ <td style="text-align: left">Boolean RLE</td>
+ </tr>
+ <tr>
+ <td style="text-align: left"> </td>
+ <td style="text-align: left">DATA</td>
+ <td style="text-align: left">No</td>
+ <td style="text-align: left">Unbounded base 128 varints</td>
+ </tr>
+ <tr>
+ <td style="text-align: left"> </td>
+ <td style="text-align: left">SECONDARY</td>
+ <td style="text-align: left">No</td>
+ <td style="text-align: left">Unsigned Integer RLE v1</td>
+ </tr>
+ <tr>
+ <td style="text-align: left">DIRECT_V2</td>
+ <td style="text-align: left">PRESENT</td>
+ <td style="text-align: left">Yes</td>
+ <td style="text-align: left">Boolean RLE</td>
+ </tr>
+ <tr>
+ <td style="text-align: left"> </td>
+ <td style="text-align: left">DATA</td>
+ <td style="text-align: left">No</td>
+ <td style="text-align: left">Unbounded base 128 varints</td>
+ </tr>
+ <tr>
+ <td style="text-align: left"> </td>
+ <td style="text-align: left">SECONDARY</td>
+ <td style="text-align: left">No</td>
+ <td style="text-align: left">Unsigned Integer RLE v2</td>
+ </tr>
+ </tbody>
+</table>
+
+<h2 id="date-columns">Date Columns</h2>
+
+<p>Date data is encoded with a PRESENT stream, a DATA stream that records
+the number of days after January 1, 1970 in UTC.</p>
+
+<table>
+ <thead>
+ <tr>
+ <th style="text-align: left">Encoding</th>
+ <th style="text-align: left">Stream Kind</th>
+ <th style="text-align: left">Optional</th>
+ <th style="text-align: left">Contents</th>
+ </tr>
+ </thead>
+ <tbody>
+ <tr>
+ <td style="text-align: left">DIRECT</td>
+ <td style="text-align: left">PRESENT</td>
+ <td style="text-align: left">Yes</td>
+ <td style="text-align: left">Boolean RLE</td>
+ </tr>
+ <tr>
+ <td style="text-align: left"> </td>
+ <td style="text-align: left">DATA</td>
+ <td style="text-align: left">No</td>
+ <td style="text-align: left">Signed Integer RLE v1</td>
+ </tr>
+ <tr>
+ <td style="text-align: left">DIRECT_V2</td>
+ <td style="text-align: left">PRESENT</td>
+ <td style="text-align: left">Yes</td>
+ <td style="text-align: left">Boolean RLE</td>
+ </tr>
+ <tr>
+ <td style="text-align: left"> </td>
+ <td style="text-align: left">DATA</td>
+ <td style="text-align: left">No</td>
+ <td style="text-align: left">Signed Integer RLE v2</td>
+ </tr>
+ </tbody>
+</table>
+
+<h2 id="timestamp-columns">Timestamp Columns</h2>
+
+<p>Timestamp records times down to nanoseconds as a PRESENT stream that
+records non-null values, a DATA stream that records the number of
+seconds after 1 January 2015, and a SECONDARY stream that records the
+number of nanoseconds.</p>
+
+<p>Because the number of nanoseconds often has a large number of trailing
+zeros, the number has trailing decimal zero digits removed and the
+last three bits are used to record how many zeros were removed. Thus
+1000 nanoseconds would be serialized as 0x0b and 100000 would be
+serialized as 0x0d.</p>
+
+<table>
+ <thead>
+ <tr>
+ <th style="text-align: left">Encoding</th>
+ <th style="text-align: left">Stream Kind</th>
+ <th style="text-align: left">Optional</th>
+ <th style="text-align: left">Contents</th>
+ </tr>
+ </thead>
+ <tbody>
+ <tr>
+ <td style="text-align: left">DIRECT</td>
+ <td style="text-align: left">PRESENT</td>
+ <td style="text-align: left">Yes</td>
+ <td style="text-align: left">Boolean RLE</td>
+ </tr>
+ <tr>
+ <td style="text-align: left"> </td>
+ <td style="text-align: left">DATA</td>
+ <td style="text-align: left">No</td>
+ <td style="text-align: left">Signed Integer RLE v1</td>
+ </tr>
+ <tr>
+ <td style="text-align: left"> </td>
+ <td style="text-align: left">SECONDARY</td>
+ <td style="text-align: left">No</td>
+ <td style="text-align: left">Unsigned Integer RLE v1</td>
+ </tr>
+ <tr>
+ <td style="text-align: left">DIRECT_V2</td>
+ <td style="text-align: left">PRESENT</td>
+ <td style="text-align: left">Yes</td>
+ <td style="text-align: left">Boolean RLE</td>
+ </tr>
+ <tr>
+ <td style="text-align: left"> </td>
+ <td style="text-align: left">DATA</td>
+ <td style="text-align: left">No</td>
+ <td style="text-align: left">Signed Integer RLE v2</td>
+ </tr>
+ <tr>
+ <td style="text-align: left"> </td>
+ <td style="text-align: left">SECONDARY</td>
+ <td style="text-align: left">No</td>
+ <td style="text-align: left">Unsigned Integer RLE v2</td>
+ </tr>
+ </tbody>
+</table>
+
+<h2 id="struct-columns">Struct Columns</h2>
+
+<p>Structs have no data themselves and delegate everything to their child
+columns except for their PRESENT stream. They have a child column
+for each of the fields.</p>
+
+<table>
+ <thead>
+ <tr>
+ <th style="text-align: left">Encoding</th>
+ <th style="text-align: left">Stream Kind</th>
+ <th style="text-align: left">Optional</th>
+ <th style="text-align: left">Contents</th>
+ </tr>
+ </thead>
+ <tbody>
+ <tr>
+ <td style="text-align: left">DIRECT</td>
+ <td style="text-align: left">PRESENT</td>
+ <td style="text-align: left">Yes</td>
+ <td style="text-align: left">Boolean RLE</td>
+ </tr>
+ </tbody>
+</table>
+
+<h2 id="list-columns">List Columns</h2>
+
+<p>Lists are encoded as the PRESENT stream and a length stream with
+number of items in each list. They have a single child column for the
+element values.</p>
+
+<table>
+ <thead>
+ <tr>
+ <th style="text-align: left">Encoding</th>
+ <th style="text-align: left">Stream Kind</th>
+ <th style="text-align: left">Optional</th>
+ <th style="text-align: left">Contents</th>
+ </tr>
+ </thead>
+ <tbody>
+ <tr>
+ <td style="text-align: left">DIRECT</td>
+ <td style="text-align: left">PRESENT</td>
+ <td style="text-align: left">Yes</td>
+ <td style="text-align: left">Boolean RLE</td>
+ </tr>
+ <tr>
+ <td style="text-align: left"> </td>
+ <td style="text-align: left">LENGTH</td>
+ <td style="text-align: left">No</td>
+ <td style="text-align: left">Unsigned Integer RLE v1</td>
+ </tr>
+ <tr>
+ <td style="text-align: left">DIRECT_V2</td>
+ <td style="text-align: left">PRESENT</td>
+ <td style="text-align: left">Yes</td>
+ <td style="text-align: left">Boolean RLE</td>
+ </tr>
+ <tr>
+ <td style="text-align: left"> </td>
+ <td style="text-align: left">LENGTH</td>
+ <td style="text-align: left">No</td>
+ <td style="text-align: left">Unsigned Integer RLE v2</td>
+ </tr>
+ </tbody>
+</table>
+
+<h2 id="map-columns">Map Columns</h2>
+
+<p>Maps are encoded as the PRESENT stream and a length stream with number
+of items in each list. They have a child column for the key and
+another child column for the value.</p>
+
+<table>
+ <thead>
+ <tr>
+ <th style="text-align: left">Encoding</th>
+ <th style="text-align: left">Stream Kind</th>
+ <th style="text-align: left">Optional</th>
+ <th style="text-align: left">Contents</th>
+ </tr>
+ </thead>
+ <tbody>
+ <tr>
+ <td style="text-align: left">DIRECT</td>
+ <td style="text-align: left">PRESENT</td>
+ <td style="text-align: left">Yes</td>
+ <td style="text-align: left">Boolean RLE</td>
+ </tr>
+ <tr>
+ <td style="text-align: left"> </td>
+ <td style="text-align: left">LENGTH</td>
+ <td style="text-align: left">No</td>
+ <td style="text-align: left">Unsigned Integer RLE v1</td>
+ </tr>
+ <tr>
+ <td style="text-align: left">DIRECT_V2</td>
+ <td style="text-align: left">PRESENT</td>
+ <td style="text-align: left">Yes</td>
+ <td style="text-align: left">Boolean RLE</td>
+ </tr>
+ <tr>
+ <td style="text-align: left"> </td>
+ <td style="text-align: left">LENGTH</td>
+ <td style="text-align: left">No</td>
+ <td style="text-align: left">Unsigned Integer RLE v2</td>
+ </tr>
+ </tbody>
+</table>
+
+<h2 id="union-columns">Union Columns</h2>
+
+<p>Unions are encoded as the PRESENT stream and a tag stream that controls which
+potential variant is used. They have a child column for each variant of the
+union. Currently ORC union types are limited to 256 variants, which matches
+the Hive type model.</p>
+
+<table>
+ <thead>
+ <tr>
+ <th style="text-align: left">Encoding</th>
+ <th style="text-align: left">Stream Kind</th>
+ <th style="text-align: left">Optional</th>
+ <th style="text-align: left">Contents</th>
+ </tr>
+ </thead>
+ <tbody>
+ <tr>
+ <td style="text-align: left">DIRECT</td>
+ <td style="text-align: left">PRESENT</td>
+ <td style="text-align: left">Yes</td>
+ <td style="text-align: left">Boolean RLE</td>
+ </tr>
+ <tr>
+ <td style="text-align: left"> </td>
+ <td style="text-align: left">DIRECT</td>
+ <td style="text-align: left">No</td>
+ <td style="text-align: left">Byte RLE</td>
+ </tr>
+ </tbody>
+</table>
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+ </li>
+ <li class="">
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+ </li>
+ <li class="">
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+ </li>
+</ul>
+
+ </nav>
+ <div class="grid">
+ <div class="unit one-third center-on-mobiles">
+ <h1>
+ <a href="/">
+ <span class="sr-only">Apache ORC</span>
+ <img src="/img/logo.png" width="249" height="115" alt="ORC Logo">
+ </a>
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+ <option value="">Navigate the docs…</option>
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+ </optgroup>
+
+ </select>
+</div>
+
+
+ <div class="unit four-fifths">
+ <article>
+ <h1>File Tail</h1>
+ <p>Since HDFS does not support changing the data in a file after it is
+written, ORC stores the top level index at the end of the file. The
+overall structure of the file is given in the figure above. The
+file’s tail consists of 3 parts; the file metadata, file footer and
+postscript.</p>
+
+<p>The metadata for ORC is stored using
+<a href="http://s.apache.org/protobuf_encoding">Protocol Buffers</a>, which provides
+the ability to add new fields without breaking readers. This document
+incorporates the Protobuf definition from the
+<a href="http://s.apache.org/orc_proto">ORC source code</a> and the
+reader is encouraged to review the Protobuf encoding if they need to
+understand the byte-level encoding</p>
+
+<h1 id="postscript">Postscript</h1>
+
+<p>The Postscript section provides the necessary information to interpret
+the rest of the file including the length of the file’s Footer and
+Metadata sections, the version of the file, and the kind of general
+compression used (eg. none, zlib, or snappy). The Postscript is never
+compressed and ends one byte before the end of the file. The version
+stored in the Postscript is the lowest version of Hive that is
+guaranteed to be able to read the file and it stored as a sequence of
+the major and minor version. There are currently two versions that are
+used: [0,11] for Hive 0.11, and [0,12] for Hive 0.12 or later.</p>
+
+<p>The process of reading an ORC file works backwards through the
+file. Rather than making multiple short reads, the ORC reader reads
+the last 16k bytes of the file with the hope that it will contain both
+the Footer and Postscript sections. The final byte of the file
+contains the serialized length of the Postscript, which must be less
+than 256 bytes. Once the Postscript is parsed, the compressed
+serialized length of the Footer is known and it can be decompressed
+and parsed.</p>
+
+<p><code>message PostScript {
+ // the length of the footer section in bytes
+ optional uint64 footerLength = 1;
+ // the kind of generic compression used
+ optional CompressionKind compression = 2;
+ // the maximum size of each compression chunk
+ optional uint64 compressionBlockSize = 3;
+ // the version of the writer
+ repeated uint32 version = 4 [packed = true];
+ // the length of the metadata section in bytes
+ optional uint64 metadataLength = 5;
+ // the fixed string "ORC"
+ optional string magic = 8000;
+}
+</code></p>
+
+<p><code>enum CompressionKind {
+ NONE = 0;
+ ZLIB = 1;
+ SNAPPY = 2;
+ LZO = 3;
+}
+</code></p>
+
+<h1 id="footer">Footer</h1>
+
+<p>The Footer section contains the layout of the body of the file, the
+type schema information, the number of rows, and the statistics about
+each of the columns.</p>
+
+<p>The file is broken in to three parts- Header, Body, and Tail. The
+Header consists of the bytes “ORC’’ to support tools that want to
+scan the front of the file to determine the type of the file. The Body
+contains the rows and indexes, and the Tail gives the file level
+information as described in this section.</p>
+
+<p><code>message Footer {
+ // the length of the file header in bytes (always 3)
+ optional uint64 headerLength = 1;
+ // the length of the file header and body in bytes
+ optional uint64 contentLength = 2;
+ // the information about the stripes
+ repeated StripeInformation stripes = 3;
+ // the schema information
+ repeated Type types = 4;
+ // the user metadata that was added
+ repeated UserMetadataItem metadata = 5;
+ // the total number of rows in the file
+ optional uint64 numberOfRows = 6;
+ // the statistics of each column across the file
+ repeated ColumnStatistics statistics = 7;
+ // the maximum number of rows in each index entry
+ optional uint32 rowIndexStride = 8;
+}
+</code></p>
+
+<h2 id="stripe-information">Stripe Information</h2>
+
+<p>The body of the file is divided into stripes. Each stripe is self
+contained and may be read using only its own bytes combined with the
+file’s Footer and Postscript. Each stripe contains only entire rows so
+that rows never straddle stripe boundaries. Stripes have three
+sections: a set of indexes for the rows within the stripe, the data
+itself, and a stripe footer. Both the indexes and the data sections
+are divided by columns so that only the data for the required columns
+needs to be read.</p>
+
+<p><code>message StripeInformation {
+ // the start of the stripe within the file
+ optional uint64 offset = 1;
+ // the length of the indexes in bytes
+ optional uint64 indexLength = 2;
+ // the length of the data in bytes
+ optional uint64 dataLength = 3;
+ // the length of the footer in bytes
+ optional uint64 footerLength = 4;
+ // the number of rows in the stripe
+ optional uint64 numberOfRows = 5;
+}
+</code></p>
+
+<h2 id="type-information">Type Information</h2>
+
+<p>All of the rows in an ORC file must have the same schema. Logically
+the schema is expressed as a tree as in the figure below, where
+the compound types have subcolumns under them.</p>
+
+<p><img src="/img/TreeWriters.png" alt="ORC column structure" /></p>
+
+<p>The equivalent Hive DDL would be:</p>
+
+<p><code>create table Foobar (
+ myInt int,
+ myMap map<string,
+ struct<myString : string,
+ myDouble: double>>,
+ myTime timestamp
+);
+</code></p>
+
+<p>The type tree is flattened in to a list via a pre-order traversal
+where each type is assigned the next id. Clearly the root of the type
+tree is always type id 0. Compound types have a field named subtypes
+that contains the list of their children’s type ids.</p>
+
+<p><code>message Type {
+ enum Kind {
+ BOOLEAN = 0;
+ BYTE = 1;
+ SHORT = 2;
+ INT = 3;
+ LONG = 4;
+ FLOAT = 5;
+ DOUBLE = 6;
+ STRING = 7;
+ BINARY = 8;
+ TIMESTAMP = 9;
+ LIST = 10;
+ MAP = 11;
+ STRUCT = 12;
+ UNION = 13;
+ DECIMAL = 14;
+ DATE = 15;
+ VARCHAR = 16;
+ CHAR = 17;
+ }
+ // the kind of this type
+ required Kind kind = 1;
+ // the type ids of any subcolumns for list, map, struct, or union
+ repeated uint32 subtypes = 2 [packed=true];
+ // the list of field names for struct
+ repeated string fieldNames = 3;
+ // the maximum length of the type for varchar or char
+ optional uint32 maximumLength = 4;
+ // the precision and scale for decimal
+ optional uint32 precision = 5;
+ optional uint32 scale = 6;
+}
+</code></p>
+
+<h2 id="column-statistics">Column Statistics</h2>
+
+<p>The goal of the column statistics is that for each column, the writer
+records the count and depending on the type other useful fields. For
+most of the primitive types, it records the minimum and maximum
+values; and for numeric types it additionally stores the sum.
+From Hive 1.1.0 onwards, the column statistics will also record if
+there are any null values within the row group by setting the hasNull flag.
+The hasNull flag is used by ORC’s predicate pushdown to better answer
+‘IS NULL’ queries.</p>
+
+<p><code>message ColumnStatistics {
+ // the number of values
+ optional uint64 numberOfValues = 1;
+ // At most one of these has a value for any column
+ optional IntegerStatistics intStatistics = 2;
+ optional DoubleStatistics doubleStatistics = 3;
+ optional StringStatistics stringStatistics = 4;
+ optional BucketStatistics bucketStatistics = 5;
+ optional DecimalStatistics decimalStatistics = 6;
+ optional DateStatistics dateStatistics = 7;
+ optional BinaryStatistics binaryStatistics = 8;
+ optional TimestampStatistics timestampStatistics = 9;
+ optional bool hasNull = 10;
+}
+</code></p>
+
+<p>For integer types (tinyint, smallint, int, bigint), the column
+statistics includes the minimum, maximum, and sum. If the sum
+overflows long at any point during the calculation, no sum is
+recorded.</p>
+
+<p><code>message IntegerStatistics {
+ optional sint64 minimum = 1;
+ optional sint64 maximum = 2;
+ optional sint64 sum = 3;
+}
+</code></p>
+
+<p>For floating point types (float, double), the column statistics
+include the minimum, maximum, and sum. If the sum overflows a double,
+no sum is recorded.</p>
+
+<p><code>message DoubleStatistics {
+ optional double minimum = 1;
+ optional double maximum = 2;
+ optional double sum = 3;
+}
+</code></p>
+
+<p>For strings, the minimum value, maximum value, and the sum of the
+lengths of the values are recorded.</p>
+
+<p><code>message StringStatistics {
+ optional string minimum = 1;
+ optional string maximum = 2;
+ // sum will store the total length of all strings
+ optional sint64 sum = 3;
+}
+</code></p>
+
+<p>For booleans, the statistics include the count of false and true values.</p>
+
+<p><code>message BucketStatistics {
+ repeated uint64 count = 1 [packed=true];
+}
+</code></p>
+
+<p>For decimals, the minimum, maximum, and sum are stored.</p>
+
+<p><code>message DecimalStatistics {
+ optional string minimum = 1;
+ optional string maximum = 2;
+ optional string sum = 3;
+}
+</code></p>
+
+<p>Date columns record the minimum and maximum values as the number of
+days since the epoch (1/1/2015).</p>
+
+<p><code>message DateStatistics {
+ // min,max values saved as days since epoch
+ optional sint32 minimum = 1;
+ optional sint32 maximum = 2;
+}
+</code></p>
+
+<p>Timestamp columns record the minimum and maximum values as the number of
+milliseconds since the epoch (1/1/2015).</p>
+
+<p><code>message TimestampStatistics {
+ // min,max values saved as milliseconds since epoch
+ optional sint64 minimum = 1;
+ optional sint64 maximum = 2;
+}
+</code></p>
+
+<p>Binary columns store the aggregate number of bytes across all of the values.</p>
+
+<p><code>message BinaryStatistics {
+ // sum will store the total binary blob length
+ optional sint64 sum = 1;
+}
+</code></p>
+
+<h2 id="user-metadata">User Metadata</h2>
+
+<p>The user can add arbitrary key/value pairs to an ORC file as it is
+written. The contents of the keys and values are completely
+application defined, but the key is a string and the value is
+binary. Care should be taken by applications to make sure that their
+keys are unique and in general should be prefixed with an organization
+code.</p>
+
+<p><code>message UserMetadataItem {
+ // the user defined key
+ required string name = 1;
+ // the user defined binary value
+ required bytes value = 2;
+}
+</code></p>
+
+<h2 id="file-metadata">File Metadata</h2>
+
+<p>The file Metadata section contains column statistics at the stripe
+level granularity. These statistics enable input split elimination
+based on the predicate push-down evaluated per a stripe.</p>
+
+<p><code>message StripeStatistics {
+ repeated ColumnStatistics colStats = 1;
+}
+</code></p>
+
+<p><code>message Metadata {
+ repeated StripeStatistics stripeStats = 1;
+}
+</code></p>
+
+
+
+
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+ <div class="left align-right">
+
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+ <a href="/docs/spec-intro.html" class="prev">Back</a>
+
+ </div>
+ <div class="right align-left">
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+ <a href="/docs/compression.html" class="next">Next</a>
+
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+ </div>
+ <div class="clear"></div>
+
+
+ </article>
+ </div>
+
+ <div class="unit one-fifth hide-on-mobiles">
+ <aside>
+
+ <h4>Overview</h4>
+
+
+<ul>
+
+
+
+
+
+
+
+
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+
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+
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+ <li class=""><a href="/docs/index.html">Background</a></li>
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+ <li class=""><a href="/docs/types.html">Types</a></li>
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+ <li class=""><a href="/docs/indexes.html">Indexes</a></li>
+
+
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+
+
+
+
+
+
+
+ <li class=""><a href="/docs/acid.html">ACID support</a></li>
+
+
+
+</ul>
+
+
+ <h4>Hive Usage</h4>
+
+
+<ul>
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
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+ <li class=""><a href="/docs/hive-ddl.html">Hive DDL</a></li>
+
+
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+
+
+
+
+
+
+
+
+
+ <li class=""><a href="/docs/hive-config.html">Hive Configuration</a></li>
+
+
+
+</ul>
+
+
+ <h4>Format Specification</h4>
+
+
+<ul>
+
+
+
+
+
+
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+
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+
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+
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+ <li class=""><a href="/docs/spec-intro.html">Introduction</a></li>
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+ <li class="current"><a href="/docs/file-tail.html">File Tail</a></li>
+
+
+
+
+
+
+
+
+
+
+
+
+
+ <li class=""><a href="/docs/compression.html">Compression</a></li>
+
+
+
+
+
+
+
+
+
+
+
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+
+
+
+
+
+
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+
+
+
+
+
+
+
+
+ <li class=""><a href="/docs/run-length.html">Run Length Encoding</a></li>
+
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+
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+ <li class=""><a href="/docs/stripes.html">Stripes</a></li>
+
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+
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+ <li class=""><a href="/docs/encodings.html">Column Encodings</a></li>
+
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+ <li class=""><a href="/docs/spec-index.html">Indexes</a></li>
+
+
+
+</ul>
+
+
+ </aside>
+</div>
+
+
+ <div class="clear"></div>
+
+ </div>
+ </section>
+
+
+ <footer role="contentinfo">
+ <p>The contents of this website are © 2015
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+ under the terms of the <a
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http://git-wip-us.apache.org/repos/asf/orc/blob/6a400548/docs/hive-config.html
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--- /dev/null
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@@ -0,0 +1,1184 @@
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+
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+ <h1>
+ <a href="/">
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+ </optgroup>
+
+ </select>
+</div>
+
+
+ <div class="unit four-fifths">
+ <article>
+ <h1>Hive Configuration</h1>
+ <h2 id="table-properties">Table properties</h2>
+
+<p>Tables stored as ORC files use table properties to control their behavior. By
+using table properties, the table owner ensures that all clients store data
+with the same options.</p>
+
+<table>
+ <thead>
+ <tr>
+ <th style="text-align: left">Key</th>
+ <th style="text-align: left">Default</th>
+ <th style="text-align: left">Notes</th>
+ </tr>
+ </thead>
+ <tbody>
+ <tr>
+ <td style="text-align: left">orc.compress</td>
+ <td style="text-align: left">ZLIB</td>
+ <td style="text-align: left">high level compression = {NONE, ZLIB, SNAPPY}</td>
+ </tr>
+ <tr>
+ <td style="text-align: left">orc.compress.size</td>
+ <td style="text-align: left">262,144</td>
+ <td style="text-align: left">compression chunk size</td>
+ </tr>
+ <tr>
+ <td style="text-align: left">orc.stripe.size</td>
+ <td style="text-align: left">268,435,456</td>
+ <td style="text-align: left">memory buffer size in bytes for writing</td>
+ </tr>
+ <tr>
+ <td style="text-align: left">orc.row.index.stride</td>
+ <td style="text-align: left">10,000</td>
+ <td style="text-align: left">number of rows between index entries</td>
+ </tr>
+ <tr>
+ <td style="text-align: left">orc.create.index</td>
+ <td style="text-align: left">true</td>
+ <td style="text-align: left">create indexes?</td>
+ </tr>
+ <tr>
+ <td style="text-align: left">orc.bloom.filter.columns</td>
+ <td style="text-align: left">””</td>
+ <td style="text-align: left">comma separated list of column names</td>
+ </tr>
+ <tr>
+ <td style="text-align: left">orc.bloom.filter.fpp</td>
+ <td style="text-align: left">0.05</td>
+ <td style="text-align: left">bloom filter false positive rate</td>
+ </tr>
+ </tbody>
+</table>
+
+<p>For example, to create an ORC table without high level compression:</p>
+
+<p><code>CREATE TABLE istari (
+ name STRING,
+ color STRING
+) STORED AS ORC TBLPROPERTIES ("orc.compress"="NONE");
+</code></p>
+
+<h2 id="configuration-properties">Configuration properties</h2>
+
+<p>There are many Hive configuration properties related to ORC files:</p>
+
+<table class="configtable">
+<tr>
+ <th>Key</th>
+ <th>Default</th>
+ <th>Notes</th>
+</tr>
+<tr>
+ <td>hive.default.fileformat</td>
+ <td>TextFile</td>
+ <td>This is the default file format for new tables. If it is set to ORC,
+ new tables will default to ORC.</td>
+</tr>
+<tr>
+ <td>hive.stats.gather.num.threads</td>
+ <td>10</td>
+ <td>Number of threads used by partialscan/noscan analyze command for
+ partitioned tables. This is applicable only for file formats that
+ implement the StatsProvidingRecordReader interface (like ORC).</td>
+</tr>
+<tr>
+ <td>hive.exec.orc.memory.pool</td>
+ <td>0.5</td>
+ <td>Maximum fraction of heap that can be used by ORC file writers.</td>
+</tr>
+<tr>
+ <td>hive.exec.orc.write.format</td>
+ <td>NULL</td>
+ <td>Define the version of the file to write. Possible values are 0.11 and
+ 0.12. If this parameter is not defined, ORC will use the latest
+ version.</td>
+</tr>
+<tr>
+ <td>hive.exec.orc.default.stripe.size</td>
+ <td>67,108,864</td>
+ <td>Define the default size of ORC writer buffers in bytes.</td>
+</tr>
+<tr>
+ <td>hive.exec.orc.default.block.size</td>
+ <td>268,435,456</td>
+ <td>Define the default file system block size for ORC files.</td>
+</tr>
+<tr>
+ <td>hive.exec.orc.dictionary.key.size.threshold</td>
+ <td>0.8</td>
+ <td>If the number of keys in a dictionary is greater than this
+ fraction of the total number of non-null rows, turn off
+ dictionary encoding. Use 1.0 to always use dictionary encoding.</td>
+</tr>
+<tr>
+ <td>hive.exec.orc.default.row.index.stride</td>
+ <td>10,000</td>
+ <td>Define the default number of rows between row index entries.</td>
+</tr>
+<tr>
+ <td>hive.exec.orc.default.buffer.size</td>
+ <td>262,144</td>
+ <td>Define the default ORC buffer size, in bytes.</td>
+</tr>
+<tr>
+ <td>hive.exec.orc.default.block.padding</td>
+ <td>true</td>
+ <td>Should ORC file writers pad stripes to minimize stripes that cross HDFS
+ block boundaries.</td>
+</tr>
+<tr>
+ <td>hive.exec.orc.block.padding.tolerance</td>
+ <td>0.05</td>
+ <td>Define the tolerance for block padding as a decimal fraction of
+ stripe size (for example, the default value 0.05 is 5% of the
+ stripe size). For the defaults of 64Mb ORC stripe and 256Mb HDFS
+ blocks, a maximum of 3.2Mb will be reserved for padding within
+ the 256Mb block with the default
+ hive.exec.orc.block.padding.tolerance. In that case, if the
+ available size within the block is more than 3.2Mb, a new
+ smaller stripe will be inserted to fit within that space. This
+ will make sure that no stripe written will cross block
+ boundaries and cause remote reads within a node local task.
+
+<tr>
+ <td>hive.exec.orc.default.compress</td>
+ <td>ZLIB</td>
+ <td>Define the default compression codec for ORC file.</td>
+</tr>
+<tr>
+ <td>hive.exec.orc.encoding.strategy</td>
+ <td>SPEED</td>
+ <td>Define the encoding strategy to use while writing data. Changing
+ this will only affect the light weight encoding for
+ integers. This flag will not change the compression level of
+ higher level compression codec (like ZLIB). Possible options are
+ SPEED and COMPRESSION.</td>
+</tr>
+<tr>
+ <td>hive.orc.splits.include.file.footer</td>
+ <td>false</td>
+ <td>If turned on, splits generated by ORC will include metadata
+ about the stripes in the file. This data is read remotely (from
+ the client or HiveServer2 machine) and sent to all the tasks.</td>
+</tr>
+<tr>
+ <td>hive.orc.cache.stripe.details.size</td>
+ <td>10,000</td>
+ <td>Cache size for keeping meta information about ORC splits cached in the
+ client.</td>
+</tr>
+<tr>
+ <td>hive.orc.compute.splits.num.threads</td>
+ <td>10</td>
+ <td>How many threads ORC should use to create splits in parallel.</td>
+</tr>
+<tr>
+ <td>hive.exec.orc.skip.corrupt.data</td>
+ <td>false</td>
+ <td>If ORC reader encounters corrupt data, this value will be used
+ to determine whether to skip the corrupt data or throw an
+ exception. The default behavior is to throw an exception.</td>
+</tr>
+<tr>
+ <td>hive.exec.orc.zerocopy</td>
+ <td>false</td>
+ <td>Use zerocopy reads with ORC. (This requires Hadoop 2.3 or later.)</td>
+</tr>
+<tr>
+ <td>hive.merge.orcfile.stripe.level</td>
+ <td>true</td>
+ <td>When hive.merge.mapfiles, hive.merge.mapredfiles or
+ hive.merge.tezfiles is enabled while writing a table with ORC
+ file format, enabling this configuration property will do
+ stripe-level fast merge for small ORC files. Note that enabling
+ this configuration property will not honor the padding tolerance
+ configuration (hive.exec.orc.block.padding.tolerance).</td>
+</tr>
+<tr>
+ <td>hive.orc.row.index.stride.dictionary.check</td>
+ <td>true</td>
+ <td>If enabled dictionary check will happen after first row index stride
+ (default 10000 rows) else dictionary check will happen before writing
+ first stripe. In both cases, the decision to use dictionary or not will
+ be retained thereafter.</td>
+</tr>
+<tr>
+ <td>hive.exec.orc.compression.strategy</td>
+ <td>SPEED</td>
+ <td>Define the compression strategy to use while writing data. This changes
+ the compression level of higher level compression codec. Value can be
+ SPEED or COMPRESSION.</td>
+</tr>
+
+</td></tr></table>
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
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+
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+
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+ <div class="left align-right">
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+
+ </div>
+ </div>
+ <div class="clear"></div>
+
+
+ </article>
+ </div>
+
+ <div class="unit one-fifth hide-on-mobiles">
+ <aside>
+
+ <h4>Overview</h4>
+
+
+<ul>
+
+
+
+
+
+
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+
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+
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+
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+
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+
+
+ <li class=""><a href="/docs/acid.html">ACID support</a></li>
+
+
+
+</ul>
+
+
+ <h4>Hive Usage</h4>
+
+
+<ul>
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+ <li class=""><a href="/docs/hive-ddl.html">Hive DDL</a></li>
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+ <li class="current"><a href="/docs/hive-config.html">Hive Configuration</a></li>
+
+
+
+</ul>
+
+
+ <h4>Format Specification</h4>
+
+
+<ul>
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
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+
+
+
+
+
+
+
+
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+
+ <li class=""><a href="/docs/spec-intro.html">Introduction</a></li>
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+ <li class=""><a href="/docs/file-tail.html">File Tail</a></li>
+
+
+
+
+
+
+
+
+
+
+
+
+
+ <li class=""><a href="/docs/compression.html">Compression</a></li>
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+ <li class=""><a href="/docs/run-length.html">Run Length Encoding</a></li>
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
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+
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+
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+ <li class=""><a href="/docs/stripes.html">Stripes</a></li>
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+ <li class=""><a href="/docs/encodings.html">Column Encodings</a></li>
+
+
+
+
+
+
+
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+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+ <li class=""><a href="/docs/spec-index.html">Indexes</a></li>
+
+
+
+</ul>
+
+
+ </aside>
+</div>
+
+
+ <div class="clear"></div>
+
+ </div>
+ </section>
+
+
+ <footer role="contentinfo">
+ <p>The contents of this website are © 2015
+ <a href="https://www.apache.org/">Apache Software Foundation</a>
+ under the terms of the <a
+ href="https://www.apache.org/licenses/LICENSE-2.0.html">
+ Apache License v2</a>. Apache ORC and its logo are trademarks
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[7/8] orc git commit: Push updated site.
Posted by om...@apache.org.
Push updated site.
Project: http://git-wip-us.apache.org/repos/asf/orc/repo
Commit: http://git-wip-us.apache.org/repos/asf/orc/commit/fdf06e44
Tree: http://git-wip-us.apache.org/repos/asf/orc/tree/fdf06e44
Diff: http://git-wip-us.apache.org/repos/asf/orc/diff/fdf06e44
Branch: refs/heads/asf-site
Commit: fdf06e44208488d98fdd0c77a9a6cec7a801ebd8
Parents: 6a40054
Author: Owen O'Malley <om...@apache.org>
Authored: Tue May 12 21:02:11 2015 -0700
Committer: Owen O'Malley <om...@apache.org>
Committed: Tue May 12 21:02:11 2015 -0700
----------------------------------------------------------------------
doap_orc.rdf | 1 +
1 file changed, 1 insertion(+)
----------------------------------------------------------------------
http://git-wip-us.apache.org/repos/asf/orc/blob/fdf06e44/doap_orc.rdf
----------------------------------------------------------------------
diff --git a/doap_orc.rdf b/doap_orc.rdf
index 26817ee..428a012 100644
--- a/doap_orc.rdf
+++ b/doap_orc.rdf
@@ -39,6 +39,7 @@ the values that are required for the current query.</description>
<programming-language>Java</programming-language>
<programming-language>C++</programming-language>
<category rdf:resource="http://projects.apache.org/category/big-data" />
+ <category rdf:resource="http://projects.apache.org/category/hadoop" />
<repository>
<GitRepository>
<location rdf:resource="https://git-wip-us.apache.org/repos/asf/orc.git"/>