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Posted to commits@cassandra.apache.org by gi...@apache.org on 2022/05/29 01:02:18 UTC
[cassandra-website] branch asf-staging updated (5a9a3e31 -> cad4dbba)
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discard 5a9a3e31 generate docs for d5d455c8
new cad4dbba generate docs for d5d455c8
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site-ui/build/ui-bundle.zip | Bin 4740078 -> 4740078 bytes
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[cassandra-website] 01/01: generate docs for d5d455c8
Posted by gi...@apache.org.
This is an automated email from the ASF dual-hosted git repository.
git-site-role pushed a commit to branch asf-staging
in repository https://gitbox.apache.org/repos/asf/cassandra-website.git
commit cad4dbba55e97a569e823411bd91f0306407d9bc
Author: jenkins <bu...@apache.org>
AuthorDate: Sun May 29 01:02:11 2022 +0000
generate docs for d5d455c8
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content/doc/4.0/cassandra/architecture/dynamo.html | 1571 +++++
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content/doc/4.0/cassandra/configuration/index.html | 885 +++
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content/doc/4.0/cassandra/cql/cql_singlefile.html | 7055 +++++++++++++++++++
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3415 files changed, 2777929 insertions(+), 477 deletions(-)
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diff --git a/content/_/apachecon_cfp.html b/content/_/apachecon_cfp.html
new file mode 100644
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+<html lang="en">
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+
+ <div class="hero hero--home grad">
+ <div class="eye"></div>
+ <div id="home-content" class="text-center flex flex-center flex-column relative z2 ma-xlarge">
+ <h1>Announcing the 2019 Apache Cassandra Summit</h1>
+ </div>
+ </div>
+ <div class="flex-center py-large arrow">
+ <div class="inner inner--narrow">
+ <div class="sect1">
+<h2 id="announcing-the-2019-apache-cassandra-summit"><a class="anchor" href="#announcing-the-2019-apache-cassandra-summit"></a>Announcing the 2019 Apache Cassandra Summit</h2>
+<div class="sectionbody">
+<div class="paragraph">
+<p>Join the Apache Cassandra community for the 2019 Apache Cassandra
+Summit, hosted with ApacheCon in Las Vegas, NV (Sept 9 - 13).</p>
+</div>
+<hr>
+<div class="sect2">
+<h3 id="apache-cassandra-at-apachecon"><a class="anchor" href="#apache-cassandra-at-apachecon"></a>Apache Cassandra at ApacheCon</h3>
+<div class="paragraph">
+<p><span class="image"><img src="/img/apachecon-2019.jpg" alt="ApacheCon 2019"></span>\{:style=``float: right;
+width: 400px''}</p>
+</div>
+<div class="paragraph">
+<p>For more information about other events at ApacheCon, see
+<a href="https://apachecon.com/acna19/index.html">ApacheCon 2019</a>.</p>
+</div>
+<div class="sect3">
+<h4 id="day-one-next-generation-cassandra-conference-ngcc"><a class="anchor" href="#day-one-next-generation-cassandra-conference-ngcc"></a>Day One: Next Generation Cassandra Conference (NGCC)</h4>
+<div class="paragraph">
+<p>NGCC (Next Generation Cassandra Conference), a one-day event for Apache
+Cassandra contributors and large system operators to meet, discuss, and
+plan future development in the project. NGCC will take place on
+<strong>Tuesday, September 10th</strong>.</p>
+</div>
+<div class="paragraph">
+<p>NGCC is an advanced event targeted toward Apache Cassandra contributors
+and large system / platform operators. Content will focus on Cassandra
+internals and is geared toward those with detailed knowledge of the
+codebase and architecture. All are welcome to attend.</p>
+</div>
+</div>
+<div class="sect3">
+<h4 id="day-two-apache-cassandra-summit"><a class="anchor" href="#day-two-apache-cassandra-summit"></a>Day Two: Apache Cassandra Summit</h4>
+<div class="paragraph">
+<p>The Apache Cassandra Summit, a one-day event for Apache Cassandra users
+to meet, network, and learn about what’s new and what’s coming in
+Cassandra. The Apache Cassandra Summit will be held on <strong>Wednesday, Sept
+11</strong>.</p>
+</div>
+<div class="paragraph">
+<p>The Apache Cassandra Summit is targeted toward a wider audience. Topics
+should be interesting and accessible to those whose first introduction
+to Cassandra is at this event, and those who have been active in the
+community for many years.</p>
+</div>
+<hr>
+</div>
+</div>
+<div class="sect2">
+<h3 id="call-for-presentations"><a class="anchor" href="#call-for-presentations"></a>Call for Presentations</h3>
+<div class="paragraph">
+<p>We’re excited to announce the Call for Presentations is now open for
+both, closing Monday, May 13 at 2pm BST (UTC+1).</p>
+</div>
+<div class="sect3">
+<h4 id="apache-cassandra-summit-cfp-40-minute-presentation-5-minute-qa"><a class="anchor" href="#apache-cassandra-summit-cfp-40-minute-presentation-5-minute-qa"></a>Apache Cassandra Summit CFP (40-minute presentation, 5-minute Q&A) –</h4>
+<div class="paragraph">
+<p><strong>Example proposals might include:</strong> - Lessons learned operating Apache
+Cassandra at scale. - Customizations and ways members of the community
+have extended Apache Cassandra to make it a great fit for their use
+case. - Stability improvements, performance enhancements, and new
+features in an upcoming Cassandra release. - Something we haven’t
+thought about that a general audience would be interested to hear.</p>
+</div>
+</div>
+<div class="sect3">
+<h4 id="next-generation-cassandra-conference-cfp-30-minute-presentation-15m-breakout"><a class="anchor" href="#next-generation-cassandra-conference-cfp-30-minute-presentation-15m-breakout"></a>Next Generation Cassandra Conference CFP (30-minute presentation, 15m breakout) –</h4>
+<div class="paragraph">
+<p><strong>Example proposals might include:</strong> - Presentations from contributors and
+large operators covering pain points and proposals to address them -
+Planned or proposed improvements in specific areas of the Apache
+Cassandra codebase - Planned or proposed improvements we can make to
+strengthen and empower the Apache Cassandra community. - Something we
+haven’t thought about that advanced operators / contributors would be
+interested to hear.</p>
+</div>
+<div class="paragraph">
+<p><a href="https://asf.jamhosted.net/cfp.html">Click here</a> to submit a proposal for
+the Apache Cassandra Summit or NGCC.</p>
+</div>
+<div class="paragraph">
+<p>When submitting, please ensure you select <code>Cassandra'' as the category.
+For NGCC submissions, please include </code>NGCC Proposal'' in the ``Optional
+Notes'' field.</p>
+</div>
+</div>
+</div>
+</div>
+</div>
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+ <div id="home-content" class="text-center flex flex-center flex-column relative z2 ma-xlarge">
+ <h1>Blog</h1>
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+ <div id="all-tiles" class="grid-list list pb-large">
+ <div class="openblock card shadow relative test">
+<div class="content">
+<div class="openblock card-header">
+<div class="content">
+<h3 id="apache-cassandra-4-1-features-client-side-password-hashing" class="discrete">Apache Cassandra 4.1 Features: Client-side Password Hashing</h3>
+<h4 id="may-26-2022" class="discrete">May 26, 2022</h4>
+</div>
+</div>
+<div class="openblock card-content">
+<div class="content">
+<div class="paragraph">
+<p>To strengthen security and avoid the use of plain-text credentials altogether, Apache Cassandra has added the option to use client-side password hashes in 4.1.</p>
+</div>
+<div class="openblock card-btn card-btn--blog">
+<div class="content">
+<div class="paragraph btn btn--alt">
+<p><a href="blog/Apache-Cassandra-4.1-Features-Client-side-Password-Hashing.html" class="page">Read More</a></p>
+</div>
+</div>
+</div>
+</div>
+</div>
+</div>
+</div>
+<div class="openblock card shadow relative test">
+<div class="content">
+<div class="openblock card-header">
+<div class="content">
+<h3 id="the-path-to-green-ci" class="discrete">The Path to Green CI</h3>
+<h4 id="may-19-2022" class="discrete">May 19, 2022</h4>
+</div>
+</div>
+<div class="openblock card-content">
+<div class="content">
+<div class="paragraph">
+<p>As we approach the GA of Cassandra 4.1, we reflect on our development journey and show some statistics to demonstrate the level of testing that now goes into the project.</p>
+</div>
+<div class="openblock card-btn card-btn--blog">
+<div class="content">
+<div class="paragraph btn btn--alt">
+<p><a href="blog/The-Path-to-Green-CI.html" class="page">Read More</a></p>
+</div>
+</div>
+</div>
+</div>
+</div>
+</div>
+</div>
+<div class="openblock card shadow relative test">
+<div class="content">
+<div class="openblock card-header">
+<div class="content">
+<h3 id="apache-cassandra-4-1-features-guardrails-framework" class="discrete">Apache Cassandra 4.1 Features: Guardrails Framework</h3>
+<h4 id="may-12-2022" class="discrete">May 12, 2022</h4>
+</div>
+</div>
+<div class="openblock card-content">
+<div class="content">
+<div class="paragraph">
+<p>Cassandra 4.1 introduces Guardrails - a framework that helps enforce good practices to avoid poor cluster performance and availability because of certain user actions.</p>
+</div>
+<div class="openblock card-btn card-btn--blog">
+<div class="content">
+<div class="paragraph btn btn--alt">
+<p><a href="blog/Apache-Cassandra-4.1-Features-Guardrails-Framework.html" class="page">Read More</a></p>
+</div>
+</div>
+</div>
+</div>
+</div>
+</div>
+</div>
+<div class="openblock card shadow relative test">
+<div class="content">
+<div class="openblock card-header">
+<div class="content">
+<h3 id="apache-cassandra-changelog-15" class="discrete">Apache Cassandra Changelog #15</h3>
+<h4 id="may-5-2022" class="discrete">May 5, 2022</h4>
+</div>
+</div>
+<div class="openblock card-content">
+<div class="content">
+<div class="paragraph">
+<p>Code freeze in readiness for Cassandra 4.1 release, volunteers needed for Build Lead role, and CFPs open for Cassandra and Performance Engineering tracks at ApacheCon NA.</p>
+</div>
+<div class="openblock card-btn card-btn--blog">
+<div class="content">
+<div class="paragraph btn btn--alt">
+<p><a href="blog/Apache-Cassandra-Changelog-15-May-2022.html" class="page">Read More</a></p>
+</div>
+</div>
+</div>
+</div>
+</div>
+</div>
+</div>
+<div class="openblock card shadow relative test">
+<div class="content">
+<div class="openblock card-header">
+<div class="content">
+<h3 id="liquibase-is-ready-to-support-cassandra-4-0-users" class="discrete">Liquibase is Ready to Support Cassandra 4.0 Users</h3>
+<h4 id="april-28-2022" class="discrete">April 28, 2022</h4>
+</div>
+</div>
+<div class="openblock card-content">
+<div class="content">
+<div class="paragraph">
+<p>Read the case study on Liquibase, which is both the name for an open source project for database change management and a company offering a paid-for version, and supports Apache Cassandra 3.11 and 4.0.</p>
+</div>
+<div class="openblock card-btn card-btn--blog">
+<div class="content">
+<div class="paragraph btn btn--alt">
+<p><a href="blog/Liquibase-is-Ready-to-Support-Cassandra-4.0-Users.html" class="page">Read More</a></p>
+</div>
+</div>
+</div>
+</div>
+</div>
+</div>
+</div>
+<div class="openblock card shadow relative test">
+<div class="content">
+<div class="openblock card-header">
+<div class="content">
+<h3 id="inside-cassandra-an-interview-with-project-contributor-aleksandr-sorokoumov" class="discrete">Inside Cassandra: An Interview with Project Contributor, Aleksandr Sorokoumov</h3>
+<h4 id="april-21-2022" class="discrete">April 21, 2022</h4>
+</div>
+</div>
+<div class="openblock card-content">
+<div class="content">
+<div class="paragraph">
+<p>We continue our Inside Cassandra series with a Q&A with Aleksandr Sorokoumov who recently accepted the committer position in recognition of his contributions.</p>
+</div>
+<div class="openblock card-btn card-btn--blog">
+<div class="content">
+<div class="paragraph btn btn--alt">
+<p><a href="blog/Inside-Cassandra-an-interview-with-Project-Contributor-Aleksandr-Sorokoumov.html" class="page">Read More</a></p>
+</div>
+</div>
+</div>
+</div>
+</div>
+</div>
+</div>
+<div class="openblock card shadow relative test">
+<div class="content">
+<div class="openblock card-header">
+<div class="content">
+<h3 id="apachecon-na-2022-call-for-papers-open" class="discrete">ApacheCon NA 2022 Call For Papers Open</h3>
+<h4 id="april-7-2022" class="discrete">April 7, 2022</h4>
+</div>
+</div>
+<div class="openblock card-content">
+<div class="content">
+<div class="paragraph">
+<p>Here is a great opportunity to contribute to the project. ApacheCon NA 2022 Call For Papers is open!</p>
+</div>
+<div class="openblock card-btn card-btn--blog">
+<div class="content">
+<div class="paragraph btn btn--alt">
+<p><a href="blog/ApacheCon-NA-2022-Call-for-Papers-Open.html" class="page">Read More</a></p>
+</div>
+</div>
+</div>
+</div>
+</div>
+</div>
+</div>
+<div class="openblock card shadow relative test">
+<div class="content">
+<div class="openblock card-header">
+<div class="content">
+<h3 id="apache-cassandra-changelog-14" class="discrete">Apache Cassandra Changelog #14</h3>
+<h4 id="april-7-2022-2" class="discrete">April 7, 2022</h4>
+</div>
+</div>
+<div class="openblock card-content">
+<div class="content">
+<div class="paragraph">
+<p>Cassandra’s GitHub PRs get a clean-up, a new committer is announced, more volunteers are needed for Build Lead, and Python vs. in-jvm dtest is discussed.</p>
+</div>
+<div class="openblock card-btn card-btn--blog">
+<div class="content">
+<div class="paragraph btn btn--alt">
+<p><a href="blog/Apache-Cassandra-Changelog-14-April-2022.html" class="page">Read More</a></p>
+</div>
+</div>
+</div>
+</div>
+</div>
+</div>
+</div>
+<div class="openblock card shadow relative test">
+<div class="content">
+<div class="openblock card-header">
+<div class="content">
+<h3 id="kinetic-data-chooses-apache-cassandra-to-deliver-workflow-automation-solution" class="discrete">Kinetic Data chooses Apache Cassandra to deliver workflow automation solution</h3>
+<h4 id="march-31-2022" class="discrete">March 31, 2022</h4>
+</div>
+</div>
+<div class="openblock card-content">
+<div class="content">
+<div class="paragraph">
+<p>Read our latest user case study. When it came to building a new platform, Kinetic Data chose Apache Cassandra as the database for building its workflow automation solution.</p>
+</div>
+<div class="openblock card-btn card-btn--blog">
+<div class="content">
+<div class="paragraph btn btn--alt">
+<p><a href="blog/Kinetic-Data-chooses-Apache-Cassandra-to-deliver-workflow-automation-solution.html" class="page">Read More</a></p>
+</div>
+</div>
+</div>
+</div>
+</div>
+</div>
+</div>
+<div class="openblock card shadow relative test">
+<div class="content">
+<div class="openblock card-header">
+<div class="content">
+<h3 id="inside-cassandra-an-interview-with-project-contributor-lorina-poland" class="discrete">Inside Cassandra: An Interview with Project Contributor, Lorina Poland</h3>
+<h4 id="march-17-2022" class="discrete">March 17, 2022</h4>
+</div>
+</div>
+<div class="openblock card-content">
+<div class="content">
+<div class="paragraph">
+<p>We continue our Inside Cassandra series by introducing the people behind the Apache Cassandra. Our first interviewee is Lorina Poland, who recently accepted the committer position in recognition of all her work on project documentation.</p>
+</div>
+<div class="openblock card-btn card-btn--blog">
+<div class="content">
+<div class="paragraph btn btn--alt">
+<p><a href="blog/Inside-Cassandra-an-interview-with-Project-Contributor-Lorina-Poland.html" class="page">Read More</a></p>
+</div>
+</div>
+</div>
+</div>
+</div>
+</div>
+</div>
+<div class="openblock card shadow relative test">
+<div class="content">
+<div class="openblock card-header">
+<div class="content">
+<h3 id="can-apache-cassandra-take-my-pem-keys" class="discrete">Can Apache Cassandra take my PEM keys?</h3>
+<h4 id="march-10-2022" class="discrete">March 10, 2022</h4>
+</div>
+</div>
+<div class="openblock card-content">
+<div class="content">
+<div class="paragraph">
+<p>Maulin Vasavada demonstrates how to use PEM-based security credentials like your private key, corresponding certificate chain, and trusted CA certificates. These credentials will have built-in support in Apache Cassandra 4.1 which will also introduce a pluggable configuration for customizing the SSL context for TLS encryption</p>
+</div>
+<div class="openblock card-btn card-btn--blog">
+<div class="content">
+<div class="paragraph btn btn--alt">
+<p><a href="blog/Can-Apache-Cassandra-take-my-PEM-keys.html" class="page">Read More</a></p>
+</div>
+</div>
+</div>
+</div>
+</div>
+</div>
+</div>
+<div class="openblock card shadow relative test">
+<div class="content">
+<div class="openblock card-header">
+<div class="content">
+<h3 id="join-apache-cassandras-google-summer-of-code-program-2022" class="discrete">Join Apache Cassandra’s Google Summer of Code Program 2022</h3>
+<h4 id="march-8-2022" class="discrete">March 8, 2022</h4>
+</div>
+</div>
+<div class="openblock card-content">
+<div class="content">
+<div class="paragraph">
+<p>Apache Cassandra will be participating in the Google Summer of Code (GSoC) in 2022 again after a successful project in 2021, and the program itself this year has some changes we are excited to announce.</p>
+</div>
+<div class="openblock card-btn card-btn--blog">
+<div class="content">
+<div class="paragraph btn btn--alt">
+<p><a href="blog/Join-Apache-Cassandras-GSoC-Program-2022.html" class="page">Read More</a></p>
+</div>
+</div>
+</div>
+</div>
+</div>
+</div>
+</div>
+<div class="openblock card shadow relative test">
+<div class="content">
+<div class="openblock card-header">
+<div class="content">
+<h3 id="apache-cassandra-changelog-13" class="discrete">Apache Cassandra Changelog #13</h3>
+<h4 id="march-3-2022" class="discrete">March 3, 2022</h4>
+</div>
+</div>
+<div class="openblock card-content">
+<div class="content">
+<div class="paragraph">
+<p>A new patch is released for all supported versions to address a known vulnerability, we celebrate three new committers, and see SAI and other CEP features approved.</p>
+</div>
+<div class="openblock card-btn card-btn--blog">
+<div class="content">
+<div class="paragraph btn btn--alt">
+<p><a href="blog/Apache-Cassandra-Changelog-13-March-2022.html" class="page">Read More</a></p>
+</div>
+</div>
+</div>
+</div>
+</div>
+</div>
+</div>
+<div class="openblock card shadow relative test">
+<div class="content">
+<div class="openblock card-header">
+<div class="content">
+<h3 id="java-se-11-lts-and-apache-cassandra" class="discrete">Java SE 11 LTS and Apache Cassandra</h3>
+<h4 id="february-24-2022" class="discrete">February 24, 2022</h4>
+</div>
+</div>
+<div class="openblock card-content">
+<div class="content">
+<div class="paragraph">
+<p>With the release of version 4.0.2, Cassandra’s support
+for Java 11 will no longer be experimental and offers a number of features including better performance because of better garbage collection.</p>
+</div>
+<div class="openblock card-btn card-btn--blog">
+<div class="content">
+<div class="paragraph btn btn--alt">
+<p><a href="blog/Apache-Cassandra-and-Java-SE-11-support.html" class="page">Read More</a></p>
+</div>
+</div>
+</div>
+</div>
+</div>
+</div>
+</div>
+<div class="openblock card shadow relative test">
+<div class="content">
+<div class="openblock card-header">
+<div class="content">
+<h3 id="apache-cassandra-upgrade-advisory" class="discrete">Apache Cassandra Upgrade Advisory</h3>
+<h4 id="february-18-2022" class="discrete">February 18, 2022</h4>
+</div>
+</div>
+<div class="openblock card-content">
+<div class="content">
+<div class="paragraph">
+<p>If the operator has configured the cluster in a documented insecure way, it is possible for malicious users to execute remote code using scripted UDFs. Users of Apache Cassandra 3.0, 3.11, and 4.0 to upgrade or to reset enable_user_defined_functions_threads back to true.</p>
+</div>
+<div class="openblock card-btn card-btn--blog">
+<div class="content">
+<div class="paragraph btn btn--alt">
+<p><a href="blog/Upgrade-Advisory2.html" class="page">Read More</a></p>
+</div>
+</div>
+</div>
+</div>
+</div>
+</div>
+</div>
+<div class="openblock card shadow relative test">
+<div class="content">
+<div class="openblock card-header">
+<div class="content">
+<h3 id="behind-the-scenes-of-an-apache-cassandra-release" class="discrete">Behind the scenes of an Apache Cassandra Release</h3>
+<h4 id="february-18-2022-2" class="discrete">February 18, 2022</h4>
+</div>
+</div>
+<div class="openblock card-content">
+<div class="content">
+<div class="paragraph">
+<p>Formalizing how we balance the need to evolve and provide cutting-edge features with long-term stability. The simple rules we use to decide when to merge and why we’ll be supporting three GA releases going forward, but why we’ve decided to support four releases for the next cycle.</p>
+</div>
+<div class="openblock card-btn card-btn--blog">
+<div class="content">
+<div class="paragraph btn btn--alt">
+<p><a href="blog/Behind-the-scenes-of-an-Apache-Cassandra-Release.html" class="page">Read More</a></p>
+</div>
+</div>
+</div>
+</div>
+</div>
+</div>
+</div>
+<div class="openblock card shadow relative test">
+<div class="content">
+<div class="openblock card-header">
+<div class="content">
+<h3 id="tightening-security-for-apache-cassandra-part-3" class="discrete">Tightening Security for Apache Cassandra: Part 3</h3>
+<h4 id="february-14-2022" class="discrete">February 14, 2022</h4>
+</div>
+</div>
+<div class="openblock card-content">
+<div class="content">
+<div class="paragraph">
+<p>In Part 3 of Maulin Vasavada’s mini-series on improving security, we detail how Cassandra 4.0 delivers ways to customize mTLS/TLS configuration while retaining the hot-reload functionality.</p>
+</div>
+<div class="openblock card-btn card-btn--blog">
+<div class="content">
+<div class="paragraph btn btn--alt">
+<p><a href="blog/Tightening-Security-for-Apache-Cassandra-Part-3.html" class="page">Read More</a></p>
+</div>
+</div>
+</div>
+</div>
+</div>
+</div>
+</div>
+<div class="openblock card shadow relative test">
+<div class="content">
+<div class="openblock card-header">
+<div class="content">
+<h3 id="apache-cassandra-changelog-12" class="discrete">Apache Cassandra Changelog #12</h3>
+<h4 id="february-10-2022" class="discrete">February 10, 2022</h4>
+</div>
+</div>
+<div class="openblock card-content">
+<div class="content">
+<div class="paragraph">
+<p>A new Build Lead role is announced. Ideas are requested for Google Summer of Code, and the Future of UDF is defined. Cassandra’s CI process is formalized and a Trie Memtable Implementation is discussed.</p>
+</div>
+<div class="openblock card-btn card-btn--blog">
+<div class="content">
+<div class="paragraph btn btn--alt">
+<p><a href="blog/Apache-Cassandra-Changelog-12-February-2022.html" class="page">Read More</a></p>
+</div>
+</div>
+</div>
+</div>
+</div>
+</div>
+</div>
+<div class="openblock card shadow relative test">
+<div class="content">
+<div class="openblock card-header">
+<div class="content">
+<h3 id="tightening-security-for-apache-cassandra-part-2" class="discrete">Tightening Security for Apache Cassandra: Part 2</h3>
+<h4 id="february-7-2022" class="discrete">February 7, 2022</h4>
+</div>
+</div>
+<div class="openblock card-content">
+<div class="content">
+<div class="paragraph">
+<p>Part 2 of Maulin Vasavada’s mini-series covers how to secure data in transit using TLS/mTLS, configure TLS/mTLS properly, and the challenges before the release of Apache Cassandra 4.0.</p>
+</div>
+<div class="openblock card-btn card-btn--blog">
+<div class="content">
+<div class="paragraph btn btn--alt">
+<p><a href="blog/Tightening-Security-for-Apache-Cassandra-Part-2.html" class="page">Read More</a></p>
+</div>
+</div>
+</div>
+</div>
+</div>
+</div>
+</div>
+<div class="openblock card shadow relative test">
+<div class="content">
+<div class="openblock card-header">
+<div class="content">
+<h3 id="tightening-security-for-apache-cassandra-part-1" class="discrete">Tightening Security for Apache Cassandra: Part 1</h3>
+<h4 id="january-31-2022" class="discrete">January 31, 2022</h4>
+</div>
+</div>
+<div class="openblock card-content">
+<div class="content">
+<div class="paragraph">
+<p>The growth in ecommerce has demanded a greater focus on data security, Maulin Vasavada begins a mini-series on how to customize SSL/TLS configurations to tighten security in Cassandra 4.0+.</p>
+</div>
+<div class="openblock card-btn card-btn--blog">
+<div class="content">
+<div class="paragraph btn btn--alt">
+<p><a href="blog/Tightening-Security-for-Apache-Cassandra-Part-1.html" class="page">Read More</a></p>
+</div>
+</div>
+</div>
+</div>
+</div>
+</div>
+</div>
+<div class="openblock card shadow relative test">
+<div class="content">
+<div class="openblock card-header">
+<div class="content">
+<h3 id="apache-cassandra-changelog-11" class="discrete">Apache Cassandra Changelog #11</h3>
+<h4 id="january-18-2022" class="discrete">January 18, 2022</h4>
+</div>
+</div>
+<div class="openblock card-content">
+<div class="content">
+<div class="paragraph">
+<p>We deck the halls with Jira tickets running an Advent Calendar during December. Many CEPs have been approved and are in development while others, such as CEP-3 and CEP-10, have already been merged. We also welcome Sumanth Pasupuleti who becomes a committer and we start warming up for Google Summer of Code.</p>
+</div>
+<div class="openblock card-btn card-btn--blog">
+<div class="content">
+<div class="paragraph btn btn--alt">
+<p><a href="blog/Apache-Cassandra-Changelog-11-January-2022.html" class="page">Read More</a></p>
+</div>
+</div>
+</div>
+</div>
+</div>
+</div>
+</div>
+<div class="openblock card shadow relative test">
+<div class="content">
+<div class="openblock card-header">
+<div class="content">
+<h3 id="configurable-storage-ports-and-why-we-need-them" class="discrete">Configurable Storage Ports and Why We Need Them</h3>
+<h4 id="january-14-2022" class="discrete">January 14, 2022</h4>
+</div>
+</div>
+<div class="openblock card-content">
+<div class="content">
+<div class="paragraph">
+<p>Cassandra’s network configuration is highly adaptable, communicating across a great variety of networks and devices, we explain how and why you might need to change your storage port configuration.</p>
+</div>
+<div class="openblock card-btn card-btn--blog">
+<div class="content">
+<div class="paragraph btn btn--alt">
+<p><a href="blog/Configurable-Storage-Ports-and-Why-We-Need-Them.html" class="page">Read More</a></p>
+</div>
+</div>
+</div>
+</div>
+</div>
+</div>
+</div>
+<div class="openblock card shadow relative test">
+<div class="content">
+<div class="openblock card-header">
+<div class="content">
+<h3 id="using-arithmetic-operators-in-cassandra-4-0" class="discrete">Using Arithmetic Operators in Cassandra 4.0</h3>
+<h4 id="december-21-2021" class="discrete">December 21, 2021</h4>
+</div>
+</div>
+<div class="openblock card-content">
+<div class="content">
+<div class="paragraph">
+<p>With the release of Cassandra 4.0, CQL now supports arithmetic operators. Benjamin Lerer describes how to use operators, and how we’ve addressed challenges around return types and types inference.</p>
+</div>
+<div class="openblock card-btn card-btn--blog">
+<div class="content">
+<div class="paragraph btn btn--alt">
+<p><a href="blog/Using-Arithmetic-Operators-in-Cassandra-4.0.html" class="page">Read More</a></p>
+</div>
+</div>
+</div>
+</div>
+</div>
+</div>
+</div>
+<div class="openblock card shadow relative test">
+<div class="content">
+<div class="openblock card-header">
+<div class="content">
+<h3 id="harry-an-open-source-fuzz-testing-and-verification-tool-for-apache-cassandra" class="discrete">Harry, an Open Source Fuzz Testing and Verification Tool for Apache Cassandra</h3>
+<h4 id="november-18-2021" class="discrete">November 18, 2021</h4>
+</div>
+</div>
+<div class="openblock card-content">
+<div class="content">
+<div class="paragraph">
+<p>Introducing Harry, an Open Source fuzz testing and verification tool for Apache Cassandra that can combine properties of stress- and integration-testing tools. Harry can generate data for an arbitrary schema, execute data modification queries against the cluster, track the progress of operation execution, and make sure that responses to read queries are correct.</p>
+</div>
+<div class="openblock card-btn card-btn--blog">
+<div class="content">
+<div class="paragraph btn btn--alt">
+<p><a href="blog/Harry-an-Open-Source-Fuzz-Testing-and-Verification-Tool-for-Apache-Cassandra.html" class="page">Read More</a></p>
+</div>
+</div>
+</div>
+</div>
+</div>
+</div>
+</div>
+<div class="openblock card shadow relative test">
+<div class="content">
+<div class="openblock card-header">
+<div class="content">
+<h3 id="inside-cassandra-an-interview-with-marcel-birkner-at-instana" class="discrete">Inside Cassandra: an interview with Marcel Birkner at Instana</h3>
+<h4 id="november-17-2021" class="discrete">November 17, 2021</h4>
+</div>
+</div>
+<div class="openblock card-content">
+<div class="content">
+<div class="paragraph">
+<p>We interview Marcel Birkner, Site Reliability Engineer at Instana, how they use Apache Cassandra to store and process the metric data at scale and benefit from Cassandra’s fault tolerance, and have learned the importance of dog-fooding.</p>
+</div>
+<div class="openblock card-btn card-btn--blog">
+<div class="content">
+<div class="paragraph btn btn--alt">
+<p><a href="blog/Inside-Cassandra-an-interview-with-Marcel-Birkner-at-Instana.html" class="page">Read More</a></p>
+</div>
+</div>
+</div>
+</div>
+</div>
+</div>
+</div>
+<div class="openblock card shadow relative test">
+<div class="content">
+<div class="openblock card-header">
+<div class="content">
+<h3 id="what-the-future-holds-for-apache-cassandra" class="discrete">What the Future Holds for Apache Cassandra</h3>
+<h4 id="october-26-2021" class="discrete">October 26, 2021</h4>
+</div>
+</div>
+<div class="openblock card-content">
+<div class="content">
+<div class="paragraph">
+<p>The release of Apache Cassandra 4.0 has opened the floodgates to new feature proposals. Many feature ideas have been approved and are in development such as a cluster and code action simulator and support for general-purpose transaction support while others, such as Storage Attached Indexing, are being discussed.</p>
+</div>
+<div class="openblock card-btn card-btn--blog">
+<div class="content">
+<div class="paragraph btn btn--alt">
+<p><a href="blog/What-the-Future-Holds-for-Apache-Cassandra.html" class="page">Read More</a></p>
+</div>
+</div>
+</div>
+</div>
+</div>
+</div>
+</div>
+<div class="openblock card shadow relative test">
+<div class="content">
+<div class="openblock card-header">
+<div class="content">
+<h3 id="apache-cassandra-changelog-10" class="discrete">Apache Cassandra Changelog #10</h3>
+<h4 id="october-5-2021" class="discrete">October 5, 2021</h4>
+</div>
+</div>
+<div class="openblock card-content">
+<div class="content">
+<div class="paragraph">
+<p>Apache Cassandra 4.0.1 is released, and Aleksei Zotov becomes a committer. Discussions are underway for some key, new feature proposals, including support for general-purpose transactions and Storage Attached Index (SAI). CEP-11, the pluggable memtable implementations proposal, has been approved, as has CEP-13 for a denylisting partitions feature.l-making.</p>
+</div>
+<div class="openblock card-btn card-btn--blog">
+<div class="content">
+<div class="paragraph btn btn--alt">
+<p><a href="blog/Apache-Cassandra-Changelog-10-October-2021.html" class="page">Read More</a></p>
+</div>
+</div>
+</div>
+</div>
+</div>
+</div>
+</div>
+<div class="openblock card shadow relative test">
+<div class="content">
+<div class="openblock card-header">
+<div class="content">
+<h3 id="reaper-anti-entropy-repair-made-easy" class="discrete">Reaper: Anti-entropy Repair Made Easy</h3>
+<h4 id="september-28-2021" class="discrete">September 28, 2021</h4>
+</div>
+</div>
+<div class="openblock card-content">
+<div class="content">
+<div class="paragraph">
+<p>Originally designed by Spotify, Reaper is an open source written in Java to schedule and orchestrate repairs of Apache Cassandra clusters. It helps make repairs as safe and reliable as possible, and with the recent release of Apache Cassandra 4.0 that also includes incremental repairs.</p>
+</div>
+<div class="openblock card-btn card-btn--blog">
+<div class="content">
+<div class="paragraph btn btn--alt">
+<p><a href="blog/Reaper-Anti-entropy-Repair-Made-Easy.html" class="page">Read More</a></p>
+</div>
+</div>
+</div>
+</div>
+</div>
+</div>
+</div>
+<div class="openblock card shadow relative test">
+<div class="content">
+<div class="openblock card-header">
+<div class="content">
+<h3 id="join-cassandra-at-apachecon-2021" class="discrete">Join Cassandra at Apachecon 2021</h3>
+<h4 id="september-20-2021" class="discrete">September 20, 2021</h4>
+</div>
+</div>
+<div class="openblock card-content">
+<div class="content">
+<div class="paragraph">
+<p>Register to attend ApacheCon 2021 for a packed series of presentations on the new features in development for Apache Cassandra, along with best practices for CI & testing, and cutting-edge use cases. The BoF event at the end of the day includes a deep dive into Apache Cassandra 4.0 and cocktail-making.</p>
+</div>
+<div class="openblock card-btn card-btn--blog">
+<div class="content">
+<div class="paragraph btn btn--alt">
+<p><a href="blog/Join-Cassandra-at-ApacheCon-2021.html" class="page">Read More</a></p>
+</div>
+</div>
+</div>
+</div>
+</div>
+</div>
+</div>
+<div class="openblock card shadow relative test">
+<div class="content">
+<div class="openblock card-header">
+<div class="content">
+<h3 id="cassandra-on-kubernetes-a-beginners-guide" class="discrete">Cassandra on Kubernetes: A Beginner’s Guide</h3>
+<h4 id="september-4-2021" class="discrete">September 4, 2021</h4>
+</div>
+</div>
+<div class="openblock card-content">
+<div class="content">
+<div class="paragraph">
+<p>Managing infrastructure has been standardizing around Kubernetes. Learn how the Apache Cassandra community has been developing solutions to simplify deployment and management of data with Cassandra operators and open source distributions for Kubernetes.</p>
+</div>
+<div class="openblock card-btn card-btn--blog">
+<div class="content">
+<div class="paragraph btn btn--alt">
+<p><a href="blog/Cassandra-on-Kubernetes-A-Beginners-Guide.html" class="page">Read More</a></p>
+</div>
+</div>
+</div>
+</div>
+</div>
+</div>
+</div>
+<div class="openblock card shadow relative test">
+<div class="content">
+<div class="openblock card-header">
+<div class="content">
+<h3 id="apache-cassandra-upgrade-advisory-2" class="discrete">Apache Cassandra Upgrade Advisory</h3>
+<h4 id="august-18-2021" class="discrete">August 18, 2021</h4>
+</div>
+</div>
+<div class="openblock card-content">
+<div class="content">
+<div class="paragraph">
+<p>Users of Apache Cassandra 3.023, 3.0.24, 3.11.9 and 3.11.10 should upgrade due to the potential for data corruption during schema changes.</p>
+</div>
+<div class="openblock card-btn card-btn--blog">
+<div class="content">
+<div class="paragraph btn btn--alt">
+<p><a href="blog/Upgrade-Advisory.html" class="page">Read More</a></p>
+</div>
+</div>
+</div>
+</div>
+</div>
+</div>
+</div>
+<div class="openblock card shadow relative test">
+<div class="content">
+<div class="openblock card-header">
+<div class="content">
+<h3 id="apache-cassandra-changelog-9" class="discrete">Apache Cassandra Changelog #9</h3>
+<h4 id="august-18-2021-2" class="discrete">August 18, 2021</h4>
+</div>
+</div>
+<div class="openblock card-content">
+<div class="content">
+<div class="paragraph">
+<p>Release of 4.0 GA, 3.0.25, and 3.0.11, upgrade advisory and Jon Meredith becomes committer.</p>
+</div>
+<div class="openblock card-btn card-btn--blog">
+<div class="content">
+<div class="paragraph btn btn--alt">
+<p><a href="blog/Apache-Cassandra-Changelog-9-August-2021.html" class="page">Read More</a></p>
+</div>
+</div>
+</div>
+</div>
+</div>
+</div>
+</div>
+<div class="openblock card shadow relative test">
+<div class="content">
+<div class="openblock card-header">
+<div class="content">
+<h3 id="apache-cassandra-4-0-overview" class="discrete">Apache Cassandra 4.0 Overview</h3>
+<h4 id="august-18-2021-3" class="discrete">August 18, 2021</h4>
+</div>
+</div>
+<div class="openblock card-content">
+<div class="content">
+<div class="paragraph">
+<p>Take a look at the full overview of the latest and greatest features of Apache Cassandra 4.0.</p>
+</div>
+<div class="openblock card-btn card-btn--blog">
+<div class="content">
+<div class="paragraph btn btn--alt">
+<p><a href="blog/Apache-Cassandra-4.0-Overview.html" class="page">Read More</a></p>
+</div>
+</div>
+</div>
+</div>
+</div>
+</div>
+</div>
+<div class="openblock card shadow relative test">
+<div class="content">
+<div class="openblock card-header">
+<div class="content">
+<h3 id="apache-cassandra-4-0-is-here" class="discrete">Apache Cassandra 4.0 is Here</h3>
+<h4 id="july-27-2021" class="discrete">July 27, 2021</h4>
+</div>
+</div>
+<div class="openblock card-content">
+<div class="content">
+<div class="paragraph">
+<p>On November 9th, 2015 the Apache Cassandra project released version 3.0 and, with it, a host of really big changes you would expect in a major version.</p>
+</div>
+<div class="openblock card-btn card-btn--blog">
+<div class="content">
+<div class="paragraph btn btn--alt">
+<p><a href="blog/Apache-Cassandra-4.0-is-Here.html" class="page">Read More</a></p>
+</div>
+</div>
+</div>
+</div>
+</div>
+</div>
+</div>
+<div class="openblock card shadow relative test">
+<div class="content">
+<div class="openblock card-header">
+<div class="content">
+<h3 id="apache-cassandra-changelog-8" class="discrete">Apache Cassandra Changelog #8</h3>
+<h4 id="june-28-2021" class="discrete">June 28, 2021</h4>
+</div>
+</div>
+<div class="openblock card-content">
+<div class="content">
+<div class="paragraph">
+<p>4.0-rc2 released, say hello to our Google Summer of Code intern and new community intro to Cassandra videos.</p>
+</div>
+<div class="openblock card-btn card-btn--blog">
+<div class="content">
+<div class="paragraph btn btn--alt">
+<p><a href="blog/Apache-Cassandra-Changelog-8-June-2021.html" class="page">Read More</a></p>
+</div>
+</div>
+</div>
+</div>
+</div>
+</div>
+</div>
+<div class="openblock card shadow relative test">
+<div class="content">
+<div class="openblock card-header">
+<div class="content">
+<h3 id="cassandra-and-kubernetes-sig-update-2" class="discrete">Cassandra and Kubernetes: SIG Update #2</h3>
+<h4 id="june-9-2021" class="discrete">June 9, 2021</h4>
+</div>
+</div>
+<div class="openblock card-content">
+<div class="content">
+<div class="paragraph">
+<p>The Cassandra Kubernetes SIG is excited to share that there has been coalescence around the Cass Operator project as the community-based operator.</p>
+</div>
+<div class="openblock card-btn card-btn--blog">
+<div class="content">
+<div class="paragraph btn btn--alt">
+<p><a href="blog/Cassandra-and-Kubernetes-SIG-Update-2.html" class="page">Read More</a></p>
+</div>
+</div>
+</div>
+</div>
+</div>
+</div>
+</div>
+<div class="openblock card shadow relative test">
+<div class="content">
+<div class="openblock card-header">
+<div class="content">
+<h3 id="apache-cassandra-changelog-7" class="discrete">Apache Cassandra Changelog #7</h3>
+<h4 id="may-31-2021" class="discrete">May 31, 2021</h4>
+</div>
+</div>
+<div class="openblock card-content">
+<div class="content">
+<div class="paragraph">
+<p>Our monthly roundup of key activities and knowledge to keep the community informed.</p>
+</div>
+<div class="openblock card-btn card-btn--blog">
+<div class="content">
+<div class="paragraph btn btn--alt">
+<p><a href="blog/Apache-Cassandra-Changelog-7-May-2021.html" class="page">Read More</a></p>
+</div>
+</div>
+</div>
+</div>
+</div>
+</div>
+</div>
+<div class="openblock card shadow relative test">
+<div class="content">
+<div class="openblock card-header">
+<div class="content">
+<h3 id="speakers-announce-for-april-28-cassandra-4-0-world-party" class="discrete">Speakers Announce for April 28 Cassandra 4.0 World party</h3>
+<h4 id="april-192021" class="discrete">April 19,2021</h4>
+</div>
+</div>
+<div class="openblock card-content">
+<div class="content">
+<div class="paragraph">
+<p>The list of speakers for Apache Cassandra’s upcoming 4.0 World Party.</p>
+</div>
+<div class="openblock card-btn card-btn--blog">
+<div class="content">
+<div class="paragraph btn btn--alt">
+<p><a href="blog/Speakers-Announced-for-April-28-Cassandra-4.0-World-Party.html" class="page">Read More</a></p>
+</div>
+</div>
+</div>
+</div>
+</div>
+</div>
+</div>
+<div class="openblock card shadow relative test">
+<div class="content">
+<div class="openblock card-header">
+<div class="content">
+<h3 id="apache-cassandra-changelog-6" class="discrete">Apache Cassandra Changelog #6</h3>
+<h4 id="april-122021" class="discrete">April 12,2021</h4>
+</div>
+</div>
+<div class="openblock card-content">
+<div class="content">
+<div class="paragraph">
+<p>Our monthly roundup of key activities and knowledge to keep the community informed.</p>
+</div>
+<div class="openblock card-btn card-btn--blog">
+<div class="content">
+<div class="paragraph btn btn--alt">
+<p><a href="blog/Apache-Cassandra-Changelog-6-April-2021.html" class="page">Read More</a></p>
+</div>
+</div>
+</div>
+</div>
+</div>
+</div>
+</div>
+<div class="openblock card shadow relative test">
+<div class="content">
+<div class="openblock card-header">
+<div class="content">
+<h3 id="apache-cassandra-world-party-2021" class="discrete">Apache Cassandra World Party 2021</h3>
+<h4 id="march-25-2021" class="discrete">March 25, 2021</h4>
+</div>
+</div>
+<div class="openblock card-content">
+<div class="content">
+<div class="paragraph">
+<p>We are now one of the most important databases today and manage the biggest workloads in the world. Because of that, we want to gather the worldwide community to</p>
+</div>
+<div class="openblock card-btn card-btn--blog">
+<div class="content">
+<div class="paragraph btn btn--alt">
+<p><a href="blog/World-Party.html" class="page">Read More</a></p>
+</div>
+</div>
+</div>
+</div>
+</div>
+</div>
+</div>
+<div class="openblock card shadow relative test">
+<div class="content">
+<div class="openblock card-header">
+<div class="content">
+<h3 id="join-apache-cassandra-for-google-summer-of-code-2021" class="discrete">Join Apache Cassandra for Google Summer of Code 2021</h3>
+<h4 id="march-10-2021" class="discrete">March 10, 2021</h4>
+</div>
+</div>
+<div class="openblock card-content">
+<div class="content">
+<div class="paragraph">
+<p>The ASF has been a GSoC mentor organization since the beginning. Apache Cassandra mentored a successful GSoC project in 2016 and we are participating again this year.</p>
+</div>
+<div class="openblock card-btn card-btn--blog">
+<div class="content">
+<div class="paragraph btn btn--alt">
+<p><a href="blog/Join-Cassandra-GSoC-2021.html" class="page">Read More</a></p>
+</div>
+</div>
+</div>
+</div>
+</div>
+</div>
+</div>
+<div class="openblock card shadow relative test">
+<div class="content">
+<div class="openblock card-header">
+<div class="content">
+<h3 id="apache-cassandra-changelog-5" class="discrete">Apache Cassandra Changelog #5</h3>
+<h4 id="march-08-2021" class="discrete">March 08, 2021</h4>
+</div>
+</div>
+<div class="openblock card-content">
+<div class="content">
+<div class="paragraph">
+<p>Our monthly roundup of key activities and knowledge to keep the community informed.</p>
+</div>
+<div class="openblock card-btn card-btn--blog">
+<div class="content">
+<div class="paragraph btn btn--alt">
+<p><a href="blog/Apache-Cassandra-Changelog-5-March-2021.html" class="page">Read More</a></p>
+</div>
+</div>
+</div>
+</div>
+</div>
+</div>
+</div>
+<div class="openblock card shadow relative test">
+<div class="content">
+<div class="openblock card-header">
+<div class="content">
+<h3 id="apache-cassandra-changelog-4" class="discrete">Apache Cassandra Changelog #4</h3>
+<h4 id="february-11-2021" class="discrete">February 11, 2021</h4>
+</div>
+</div>
+<div class="openblock card-content">
+<div class="content">
+<div class="paragraph">
+<p>Our monthly roundup of key activities and knowledge to keep the community informed.</p>
+</div>
+<div class="openblock card-btn card-btn--blog">
+<div class="content">
+<div class="paragraph btn btn--alt">
+<p><a href="blog/Apache-Cassandra-Changelog-4-February-2021.html" class="page">Read More</a></p>
+</div>
+</div>
+</div>
+</div>
+</div>
+</div>
+</div>
+<div class="openblock card shadow relative test">
+<div class="content">
+<div class="openblock card-header">
+<div class="content">
+<h3 id="apache-cassandra-changelog-3" class="discrete">Apache Cassandra Changelog #3</h3>
+<h4 id="january-19-2021" class="discrete">January 19, 2021</h4>
+</div>
+</div>
+<div class="openblock card-content">
+<div class="content">
+<div class="paragraph">
+<p>Our monthly roundup of key activities and knowledge to keep the community informed.</p>
+</div>
+<div class="openblock card-btn card-btn--blog">
+<div class="content">
+<div class="paragraph btn btn--alt">
+<p><a href="blog/Apache-Cassandra-Changelog-3-January-2021.html" class="page">Read More</a></p>
+</div>
+</div>
+</div>
+</div>
+</div>
+</div>
+</div>
+<div class="openblock card shadow relative test">
+<div class="content">
+<div class="openblock card-header">
+<div class="content">
+<h3 id="apache-cassandra-changelog-2" class="discrete">Apache Cassandra Changelog #2</h3>
+<h4 id="december-01-2020" class="discrete">December 01, 2020</h4>
+</div>
+</div>
+<div class="openblock card-content">
+<div class="content">
+<div class="paragraph">
+<p>Our monthly roundup of key activities and knowledge to keep the community informed.</p>
+</div>
+<div class="openblock card-btn card-btn--blog">
+<div class="content">
+<div class="paragraph btn btn--alt">
+<p><a href="blog/Apache-Cassandra-Changelog-2-December-2020.html" class="page">Read More</a></p>
+</div>
+</div>
+</div>
+</div>
+</div>
+</div>
+</div>
+<div class="openblock card shadow relative test">
+<div class="content">
+<div class="openblock card-header">
+<div class="content">
+<h3 id="apache-cassandra-changelog-1" class="discrete">Apache Cassandra Changelog #1</h3>
+<h4 id="october-28-2020" class="discrete">October 28, 2020</h4>
+</div>
+</div>
+<div class="openblock card-content">
+<div class="content">
+<div class="paragraph">
+<p>Introducing the first Cassandra Changelog blog! Our monthly roundup of key activities and knowledge to keep the community informed.</p>
+</div>
+<div class="openblock card-btn card-btn--blog">
+<div class="content">
+<div class="paragraph btn btn--alt">
+<p><a href="blog/Apache-Cassandra-Changelog-1-October-2020.html" class="page">Read More</a></p>
+</div>
+</div>
+</div>
+</div>
+</div>
+</div>
+</div>
+<div class="openblock card shadow relative test">
+<div class="content">
+<div class="openblock card-header">
+<div class="content">
+<h3 id="apache-cassandra-usage-report-2020" class="discrete">Apache Cassandra Usage Report 2020</h3>
+<h4 id="september-17-2020" class="discrete">September 17, 2020</h4>
+</div>
+</div>
+<div class="openblock card-content">
+<div class="content">
+<div class="paragraph">
+<p>Apache Cassandra is the open source NoSQL database for mission critical data. Today the community announced findings from a comprehensive global survey of 901 practitioners on Cassandra usage. It’s the first of what will become an annual survey that provides a baseline understanding of who, how, and why organizations use Cassandra.</p>
+</div>
+<div class="openblock card-btn card-btn--blog">
+<div class="content">
+<div class="paragraph btn btn--alt">
+<p><a href="blog/Apache-Cassandra-Usage-Report-2020.html" class="page">Read More</a></p>
+</div>
+</div>
+</div>
+</div>
+</div>
+</div>
+</div>
+<div class="openblock card shadow relative test">
+<div class="content">
+<div class="openblock card-header">
+<div class="content">
+<h3 id="improving-apache-cassandras-front-door-and-backpressure" class="discrete">Improving Apache Cassandra’s Front Door and Backpressure</h3>
+<h4 id="september-03-2020" class="discrete">September 03, 2020</h4>
+</div>
+</div>
+<div class="openblock card-content">
+<div class="content">
+<div class="paragraph">
+<p>As part of CASSANDRA-15013, we have improved Cassandra’s ability to handle high throughput workloads, while having enough safeguards in place to protect itself from potentially going out of memory. In order to better explain the change we have made, let us understand at a high level, on how an incoming request is processed by Cassandra before the fix, followed by what we changed, and the new relevant configuration knobs available.</p>
+</div>
+<div class="openblock card-btn card-btn--blog">
+<div class="content">
+<div class="paragraph btn btn--alt">
+<p><a href="blog/Improving-Apache-Cassandras-Front-Door-and-Backpressure.html" class="page">Read More</a></p>
+</div>
+</div>
+</div>
+</div>
+</div>
+</div>
+</div>
+<div class="openblock card shadow relative test">
+<div class="content">
+<div class="openblock card-header">
+<div class="content">
+<h3 id="cassandra-and-kubernetes-sig-update-and-survey" class="discrete">Cassandra and Kubernetes: SIG Update and Survey</h3>
+<h4 id="august-14-2020" class="discrete">August 14, 2020</h4>
+</div>
+</div>
+<div class="openblock card-content">
+<div class="content">
+<div class="paragraph">
+<p>Five operators for Apache Cassandra have been created that have made it easier to run containerized Cassandra on Kubernetes. Recently the major contributors to these operators came together to discuss the creation of a community-based operator with the intent of making one that makes it easy to run C* on K8s. One of the project’s organizational goals is that the end result will eventually become part of the Apache Software Foundation or the Apache Cassandra project.</p>
+</div>
+<div class="openblock card-btn card-btn--blog">
+<div class="content">
+<div class="paragraph btn btn--alt">
+<p><a href="blog/Cassandra-and-Kubernetes-SIG-Update-and-Survey.html" class="page">Read More</a></p>
+</div>
+</div>
+</div>
+</div>
+</div>
+</div>
+</div>
+<div class="openblock card shadow relative test">
+<div class="content">
+<div class="openblock card-header">
+<div class="content">
+<h3 id="introducing-apache-cassandra-4-0-beta-battle-tested-from-day-one" class="discrete">Introducing Apache Cassandra 4.0 Beta: Battle Tested From Day One</h3>
+<h4 id="july-20-2020" class="discrete">July 20, 2020</h4>
+</div>
+</div>
+<div class="openblock card-content">
+<div class="content">
+<div class="paragraph">
+<p>This is the most stable Apache Cassandra in history; you should start using Apache Cassandra 4.0 Beta today in your test and QA environments, head to the downloads site to get your hands on it. The Cassandra community is on a mission to deliver a 4.0 GA release that is ready to be deployed to production. You can guarantee this holds true by running your application workloads against the Beta release and contributing to the community’s validation effort to get Cassandra 4.0 to GA.</p>
+</div>
+<div class="openblock card-btn card-btn--blog">
+<div class="content">
+<div class="paragraph btn btn--alt">
+<p><a href="blog/Introducing-Apache-Cassandra-4-Beta-Battle-Tested-From-Day-One.html" class="page">Read More</a></p>
+</div>
+</div>
+</div>
+</div>
+</div>
+</div>
+</div>
+<div class="openblock card shadow relative test">
+<div class="content">
+<div class="openblock card-header">
+<div class="content">
+<h3 id="even-higher-availability-with-5x-faster-streaming-in-cassandra-4-0" class="discrete">Even Higher Availability with 5x Faster Streaming in Cassandra 4.0</h3>
+<h4 id="april-09-2019" class="discrete">April 09, 2019</h4>
+</div>
+</div>
+<div class="openblock card-content">
+<div class="content">
+<div class="paragraph">
+<p>Streaming is a process where nodes of a cluster exchange data in the form of SSTables. Streaming can kick in during many situations such as bootstrap, repair, rebuild, range movement, cluster expansion, etc. In this post, we discuss the massive performance improvements made to the streaming process in Apache Cassandra 4.0.</p>
+</div>
+<div class="openblock card-btn card-btn--blog">
+<div class="content">
+<div class="paragraph btn btn--alt">
+<p><a href="blog/Even-Higher-Availability-with-5x-Faster-Streaming-in-Cassandra-4.html" class="page">Read More</a></p>
+</div>
+</div>
+</div>
+</div>
+</div>
+</div>
+</div>
+<div class="openblock card shadow relative test">
+<div class="content">
+<div class="openblock card-header">
+<div class="content">
+<h3 id="introducing-transient-replication" class="discrete">Introducing Transient Replication</h3>
+<h4 id="december-03-2018" class="discrete">December 03, 2018</h4>
+</div>
+</div>
+<div class="openblock card-content">
+<div class="content">
+<div class="paragraph">
+<p>Transient Replication is a new experimental feature soon to be available in 4.0. When enabled, it allows for the creation of keyspaces where replication factor can be specified as a number of copies (full replicas) and temporary copies (transient replicas). Transient replicas retain the data they replicate only long enough for it to be propagated to full replicas, via incremental repair, at which point the data is deleted. Writing to transient replicas can be avoided almost entirely i [...]
+</div>
+<div class="openblock card-btn card-btn--blog">
+<div class="content">
+<div class="paragraph btn btn--alt">
+<p><a href="blog/Introducing-Transient-Replication.html" class="page">Read More</a></p>
+</div>
+</div>
+</div>
+</div>
+</div>
+</div>
+</div>
+<div class="openblock card shadow relative test">
+<div class="content">
+<div class="openblock card-header">
+<div class="content">
+<h3 id="audit-logging-in-apache-cassandra-4-0" class="discrete">Audit Logging in Apache Cassandra 4.0</h3>
+<h4 id="october-29-2018" class="discrete">October 29, 2018</h4>
+</div>
+</div>
+<div class="openblock card-content">
+<div class="content">
+<div class="paragraph">
+<p>Database audit logging is an industry standard tool for enterprises to capture critical data change events including what data changed and who triggered the event. These captured records can then be reviewed later to ensure compliance with regulatory, security and operational policies.</p>
+</div>
+<div class="openblock card-btn card-btn--blog">
+<div class="content">
+<div class="paragraph btn btn--alt">
+<p><a href="blog/Audit-Logging-in-Apache-Cassandra-4.html" class="page">Read More</a></p>
+</div>
+</div>
+</div>
+</div>
+</div>
+</div>
+</div>
+<div class="openblock card shadow relative test">
+<div class="content">
+<div class="openblock card-header">
+<div class="content">
+<h3 id="finding-bugs-in-cassandras-internals-with-property-based-testing" class="discrete">Finding Bugs in Cassandra’s Internals with Property-based Testing</h3>
+<h4 id="october-17-2018" class="discrete">October 17, 2018</h4>
+</div>
+</div>
+<div class="openblock card-content">
+<div class="content">
+<div class="paragraph">
+<p>As of September 1st, the Apache Cassandra community has shifted the focus of Cassandra 4.0 development from new feature work to testing, validation, and hardening, with the goal of releasing a stable 4.0 that every Cassandra user, from small deployments to large corporations, can deploy with confidence. There are several projects and methodologies that the community is undertaking to this end. One of these is the adoption of property-based testing, which was previously introduced here [...]
+</div>
+<div class="openblock card-btn card-btn--blog">
+<div class="content">
+<div class="paragraph btn btn--alt">
+<p><a href="blog/Finding-Bugs-in-Cassandra's-Internals-with-Property-based-Testing.html" class="page">Read More</a></p>
+</div>
+</div>
+</div>
+</div>
+</div>
+</div>
+</div>
+<div class="openblock card shadow relative test">
+<div class="content">
+<div class="openblock card-header">
+<div class="content">
+<h3 id="testing-apache-cassandra-4-0" class="discrete">Testing Apache Cassandra 4.0</h3>
+<h4 id="august-21-2018" class="discrete">August 21, 2018</h4>
+</div>
+</div>
+<div class="openblock card-content">
+<div class="content">
+<div class="paragraph">
+<p>With the goal of ensuring reliability and stability in Apache Cassandra 4.0, the project’s committers have voted to freeze new features on September 1 to concentrate on testing and validation before cutting a stable beta. Towards that goal, the community is investing in methodologies that can be performed at scale to exercise edge cases in the largest Cassandra clusters. The result, we hope, is to make Apache Cassandra 4.0 the best-tested and most reliable major release right out of t [...]
+</div>
+<div class="openblock card-btn card-btn--blog">
+<div class="content">
+<div class="paragraph btn btn--alt">
+<p><a href="blog/Testing-Apache-Cassandra-4.html" class="page">Read More</a></p>
+</div>
+</div>
+</div>
+</div>
+</div>
+</div>
+</div>
+<div class="openblock card shadow relative test">
+<div class="content">
+<div class="openblock card-header">
+<div class="content">
+<h3 id="hardware-bound-zero-copy-streaming-in-apache-cassandra-4-0" class="discrete">Hardware-bound Zero Copy Streaming in Apache Cassandra 4.0</h3>
+<h4 id="august-07-2018" class="discrete">August 07, 2018</h4>
+</div>
+</div>
+<div class="openblock card-content">
+<div class="content">
+<div class="paragraph">
+<p>Streaming in Apache Cassandra powers host replacement, range movements, and cluster expansions. Streaming plays a crucial role in the cluster and as such its performance is key to not only the speed of the operations its used in but the cluster’s health generally. In Apache Cassandra 4.0, we have introduced an improved streaming implementation that reduces GC pressure and increases throughput several folds and are now limited, in some cases, only by the disk / network IO (See: CASSAND [...]
+</div>
+<div class="openblock card-btn card-btn--blog">
+<div class="content">
+<div class="paragraph btn btn--alt">
+<p><a href="blog/Hardware-bound-Zero-Copy-Streaming-in-Apache-Cassandra-4.html" class="page">Read More</a></p>
+</div>
+</div>
+</div>
+</div>
+</div>
+</div>
+</div>
+ </div>
+ </div>
+ </section>
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diff --git a/content/_/blog/Apache-Cassandra-4.0-Overview.html b/content/_/blog/Apache-Cassandra-4.0-Overview.html
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+ <h1>Apache Cassandra 4.0 Overview: Intensively Tested, Stable and Packed with Features for Scaling Operations Faster, Auditing, and Privacy</h1>
+ <h3>August 18, 2021 | The Apache Cassandra Community</h3>
+ </div>
+ </div>
+ <div id="blog-post" class="flex-center py-large arrow">
+ <div class="blog-breadcrumb mb-medium">
+ <div class="inner inner--narrow">
+ <a href="/_/blog.html">« Back to the Apache Cassandra Blog</a>
+ </div>
+ </div>
+ <div class="post-content">
+ <div class="inner inner--narrow">
+ <div class="paragraph">
+<p>With more than 1,000 bug fixes, Apache Cassandra 4.0 has hit General Availability. It is the most stable release in the project’s history and sets a new high benchmark for distributed databases, having undergone intensive testing to ensure that upgrading and deployments are easy and smooth.</p>
+</div>
+<div class="paragraph">
+<p>Apache Cassandra 4.0 effortlessly handles unstructured data, with thousands of writes per second. It is community-hardened and tested by Amazon, Apple, DataStax, Instaclustr, iland, Netflix, and others that routinely run clusters as large as 1,000 nodes and with hundreds of real-world use cases and schemas.</p>
+</div>
+<div class="paragraph">
+<p>"A long time coming, Cassandra 4.0 is the most thoroughly tested Cassandra yet," said Nate McCall, Apache Cassandra committer and PMC chair. "The latest version is faster, more scalable, and bolstered with enterprise security features, ready-for-production with unprecedented scale in the Cloud."</p>
+</div>
+<div class="paragraph">
+<p>Testing included purpose-built new tools to cover every requirement:</p>
+</div>
+<div class="ulist">
+<ul>
+<li>
+<p>Property-based / fuzz testing</p>
+</li>
+<li>
+<p>Replay testing</p>
+</li>
+<li>
+<p>Upgrade / diff testing</p>
+</li>
+<li>
+<p>Performance testing</p>
+</li>
+<li>
+<p>Fault injection</p>
+</li>
+<li>
+<p>Unit / dtest coverage expansion</p>
+</li>
+</ul>
+</div>
+<div class="paragraph">
+<p>Those <a href="#blog/Testing-Apache-Cassandra-4.html">tools</a> were perfected and deployed to help meet quality goals and set a baseline for any future version of Cassandra. They provide needed infrastructure to ensure future releases retain the highest levels of quality and correctness.</p>
+</div>
+<div class="paragraph">
+<p>So, what can you expect from Cassandra 4.0?</p>
+</div>
+<div class="ulist">
+<ul>
+<li>
+<p>Increased speed and scalability – uses Zero Copy Streaming to stream data up to five times faster during scaling operations without virtual nodes (vnodes) and up to 25% faster throughput on reads and writes — which delivers a more elastic architecture particularly in Cloud and Kubernetes deployments.</p>
+</li>
+<li>
+<p>Improved consistency – the fundamentals of the algorithm for incremental anti-entropy repair have been rewritten, which keeps data replicas in sync to optimize incremental repair for faster, more efficient operation and consistency across data replicas. A full repair no longer requires a costly anti-compaction during the preparation phase.</p>
+</li>
+</ul>
+</div>
+<div class="imageblock">
+<div class="content">
+<img src="../_images/blog/4.0-overview-1.png" alt="imrpoved consistency">
+</div>
+</div>
+<div class="ulist">
+<ul>
+<li>
+<p>New configuration settings – exposed system metrics and configuration settings provide flexibility for operators to ensure they have easy access to data that optimize deployments. Virtual Tables lets you selectively expose system metrics and configuration settings through the Cassandra Query Language (CQL) rather than JMX.</p>
+</li>
+<li>
+<p>Minimized latency – garbage collector pause times are reduced to a few milliseconds with no latency degradation as heap sizes increase. With Java 11 support, version 4.0 uses the garbage collection algorithm ZGC to help teams optimize processes.</p>
+</li>
+<li>
+<p>Enhanced security and observability – audit logging tracks users’ access and activity with minimal impact on workload performance. New capture and replay enables analysis of production workloads to help ensure regulatory and security compliance with SOX, PCI, GDPR, or other requirements. This includes being able to track DML, DDL, and DCL activity with minimal performance hits. There’s also a new FQL tool to capture and replay live traffic data from production for analysis.</p>
+</li>
+</ul>
+</div>
+<div class="imageblock">
+<div class="content">
+<img src="../_images/blog/4.0-overview-2.png" alt="enahnced security and observability">
+</div>
+</div>
+<div class="ulist">
+<ul>
+<li>
+<p>Better compression – improved compression efficiency eases unnecessary strain on disk space and improves read performance. Compression is configured on a per-table basis and v4.0 supports Zstandard (Zstd), the data compression algorithm.</p>
+</li>
+<li>
+<p>A shift to a 12-month release cycle, with releases to be supported for a three-year term.</p>
+</li>
+</ul>
+</div>
+<div class="paragraph">
+<p>Let the community know via the <a href="../community.html#how-to-contribute" class="page">Apache Cassandra mailing list or Slack if you do run into any bugs</a>.</p>
+</div>
+<div class="paragraph">
+<p>You can download Apache Cassandra, documentation, and ways to become involved with the Apache Cassandra community by visiting /[<a href="/" class="bare">cassandra.apache.org/</a>] and <a href="https://twitter.com/cassandra" target="_blank" rel="noopener">https://twitter.com/cassandra</a>.</p>
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+
+ <div class="hero hero--home grad">
+ <div class="eye"></div>
+ <div id="home-content" class="text-center flex flex-center flex-column relative z2 ma-xlarge">
+ <h1>Apache Cassandra 4.0 is Here</h1>
+ <h3>July 27, 2021 | The Apache Cassandra Community</h3>
+ </div>
+ </div>
+ <div id="blog-post" class="flex-center py-large arrow">
+ <div class="blog-breadcrumb mb-medium">
+ <div class="inner inner--narrow">
+ <a href="/_/blog.html">« Back to the Apache Cassandra Blog</a>
+ </div>
+ </div>
+ <div class="post-content">
+ <div class="inner inner--narrow">
+ <div class="paragraph">
+<p>On November 9th, 2015 the Apache Cassandra project released version 3.0 and, with it, a host of really big changes you would expect in a major version. Over the past six years, there have been releases inside the 3.x branch but never a major version release. <a href="../download.html" class="page">Today we feel a lot of pride in our community with the release of Cassandra 4.0</a>. It has been a long time coming, but we hope you will see it was worth the wait.</p>
+</div>
+<div class="paragraph">
+<p>Six years is a long time between major releases and many in our community have asked why it has taken so long. The shortest and easiest answer is that the project decided to become uncompromising on one important feature: quality. As the project was gaining traction in the early years, there was an unfortunate general rule about Cassandra: Wait until the x.6 version or six months before upgrading your production clusters to a new version. Software projects have already had the user ru [...]
+</div>
+<div class="paragraph">
+<p>To get the quality required, we took a completely different approach to verify data correctness in Cassandra. The scale that Cassandra clusters can reach means that there is an enormous surface area for potential bugs or data corruption, so we purpose-built new tools to cover every requirement.</p>
+</div>
+<div class="ulist">
+<ul>
+<li>
+<p>Property-based / fuzz testing</p>
+</li>
+<li>
+<p>Replay testing</p>
+</li>
+<li>
+<p>Upgrade / diff testing</p>
+</li>
+<li>
+<p>Performance testing</p>
+</li>
+<li>
+<p>Fault injection</p>
+</li>
+<li>
+<p>Unit/dtest coverage expansion</p>
+</li>
+</ul>
+</div>
+<div class="paragraph">
+<p>Over the past six years, <a href="Testing-Apache-Cassandra-4.html" class="page">those tools were perfected and deployed to help meet our quality goals</a>. This sets an important baseline for any future version of Cassandra and provides the needed infrastructure to ensure future releases maintain a high level of quality and correctness; this has resulted in over 1,000 bugs being identified and fixed. Many only surfaced in the largest scale production workloads, which are notoriously h [...]
+</div>
+<div class="paragraph">
+<p>Cassandra is used as the database of record for some of the most critical applications running in the world today. From finance to healthcare and everything in between, the data that is stored in Cassandra has to have the highest guarantees of correctness and quality. Knowing this, the Project Management Committee (PMC) set an almost impossibly high bar of quality that no other database has been held to. The policy agreed upon was simply stated: <a href="https://cwiki.apache.org/confl [...]
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diff --git a/content/_/blog/Apache-Cassandra-4.1-Features-Client-side-Password-Hashing.html b/content/_/blog/Apache-Cassandra-4.1-Features-Client-side-Password-Hashing.html
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+ <h1>Apache Cassandra 4.1 Features: Client-side Password Hashing</h1>
+ <h3>May 26, 2022 | Berenguer Blasi</h3>
+ </div>
+ </div>
+ <div id="blog-post" class="flex-center py-large arrow">
+ <div class="blog-breadcrumb mb-medium">
+ <div class="inner inner--narrow">
+ <a href="/_/blog.html">« Back to the Apache Cassandra Blog</a>
+ </div>
+ </div>
+ <div class="post-content">
+ <div class="inner inner--narrow">
+ <div id="preamble">
+<div class="sectionbody">
+<div class="imageblock">
+<div class="content">
+<img src="../_images/blog/apache-cassandra-4.1-features-client-side-password-hashing-unsplash-jan-baborak.jpg" alt="Client-side password hashing">
+</div>
+<div class="title">Image credit: <a href="https://unsplash.com/@janbaborak" target="_blank" rel="noopener">Jan Baborák on Unsplash</a></div>
+</div>
+<div class="paragraph">
+<p>Apache Cassandra, just like any other database, needs users to connect. This means using a login and a password which up until recently would be provided as plain text.</p>
+</div>
+<div class="paragraph">
+<p>This has the potential to create security concerns as, for instance, audit logging could store the credentials in plain text. This problem also applied to any other system in Cassandra that might log data, bearing in mind that Apache Cassandra is an open source project and, therefore, it does not control all possible forks and implementations and what and how data is logged.</p>
+</div>
+<div class="paragraph">
+<p>The solution was to sanitize any logging for sensitive information, and this has been addressed recently. But that still left the door open to some corner cases where the detection or removal of such sensitive information could fail. There are also specific use cases, services and applications that might need to store a user’s credentials and up until 4.1, they would be storing that in plain text as well.</p>
+</div>
+<div class="paragraph">
+<p>To strengthen security, we wanted to avoid the use of plain-text credentials altogether, so <a href="https://issues.apache.org/jira/browse/CASSANDRA-17334" target="_blank" rel="noopener">CASSANDRA-17334</a> and the release of Apache Cassandra 4.1 will add the option to use client-side password hashes.</p>
+</div>
+</div>
+</div>
+<div class="sect2">
+<h3 id="new-hash-password-tool"><a class="anchor" href="#new-hash-password-tool"></a>New Hash Password Tool</h3>
+<div class="paragraph">
+<p>This feature introduces a new tool called <code>tools/bin/hash_password</code>. Here is an example:</p>
+</div>
+<div class="listingblock">
+<div class="content">
+<pre class="highlightjs highlight"><code class="language-asciidoc hljs" data-lang="asciidoc">$ tools/bin/hash_password -p mySecret
+$2a$10$F5pRau9mKg5abP.DsuPQl.8rQpEoNm3OV91mKjb9vdKPUPejIPq/u</code></pre>
+</div>
+</div>
+<div class="paragraph">
+<p>The tool is quite self-explanatory. It takes your plain-text secret and provides a <a href="https://www.mindrot.org/projects/jBCrypt/" target="_blank" rel="noopener">jBCrypt</a> hash that can be used in the DDL commands, e.g., to create or alter users/roles. For the moment only a Java version is available.</p>
+</div>
+</div>
+<div class="sect2">
+<h3 id="example-usage-of-hash_password"><a class="anchor" href="#example-usage-of-hash_password"></a>Example Usage of Hash_Password</h3>
+<div class="paragraph">
+<p>Let’s look at some examples of how we’d use the tool.</p>
+</div>
+<div class="paragraph">
+<p>Plain option:</p>
+</div>
+<div class="listingblock">
+<div class="content">
+<pre class="highlightjs highlight"><code class="language-asciidoc hljs" data-lang="asciidoc">CREATE ROLE role1
+ WITH LOGIN = true
+ AND PASSWORD = 'mySecret';</code></pre>
+</div>
+</div>
+<div class="paragraph">
+<p>New hashed option:</p>
+</div>
+<div class="listingblock">
+<div class="content">
+<pre class="highlightjs highlight"><code class="language-asciidoc hljs" data-lang="asciidoc">CREATE ROLE role1
+ WITH LOGIN = true
+ AND HASHED PASSWORD ‘$2a$10$F5pRau9mKg5abP.DsuPQl.8rQpEoNm3OV91mKjb9vdKPUPejIPq/u’;</code></pre>
+</div>
+</div>
+<div class="paragraph">
+<p>As you can see we’re building the CQL with the hashed value of the password directly, i.e., this enables our applications to store the hash instead of the plain-text password. Also, any intermediate or third-party systems, additional logging or storing will deal with the hashes so the risk of accidental plain-text passwords leak is removed.</p>
+</div>
+<div class="paragraph">
+<p>The same applies to ALTER statements.</p>
+</div>
+<div class="paragraph">
+<p>Plain option:</p>
+</div>
+<div class="listingblock">
+<div class="content">
+<pre class="highlightjs highlight"><code class="language-asciidoc hljs" data-lang="asciidoc">ALTER ROLE role1
+ WITH PASSWORD = '%s'</code></pre>
+</div>
+</div>
+<div class="paragraph">
+<p>New hashed option:</p>
+</div>
+<div class="listingblock">
+<div class="content">
+<pre class="highlightjs highlight"><code class="language-asciidoc hljs" data-lang="asciidoc">ALTER ROLE role1
+ WITH HASHED PASSWORD = '%s'</code></pre>
+</div>
+</div>
+</div>
+<div class="sect2">
+<h3 id="backward-compatibility"><a class="anchor" href="#backward-compatibility"></a>Backward Compatibility</h3>
+<div class="paragraph">
+<p>This feature is backward compatible so it will also work for CREATE/ALTER USER statements. On occasions where the built-in password obfuscation fails when logging data, this feature will only reveal the hash instead of the plain-text password.</p>
+</div>
+<div class="paragraph">
+<p>Stay tuned for upcoming further security enhancements, such as <a href="https://issues.apache.org/jira/browse/CASSANDRA-17501" target="_blank" rel="noopener">CASSANDRA-17501</a>.</p>
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diff --git a/content/_/blog/Apache-Cassandra-4.1-Features-Guardrails-Framework.html b/content/_/blog/Apache-Cassandra-4.1-Features-Guardrails-Framework.html
new file mode 100644
index 00000000..6e2e7cbe
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+ <h1>Apache Cassandra 4.1 Features: Guardrails Framework</h1>
+ <h3>May 12, 2022 | Andrés de la Peña</h3>
+ </div>
+ </div>
+ <div id="blog-post" class="flex-center py-large arrow">
+ <div class="blog-breadcrumb mb-medium">
+ <div class="inner inner--narrow">
+ <a href="/_/blog.html">« Back to the Apache Cassandra Blog</a>
+ </div>
+ </div>
+ <div class="post-content">
+ <div class="inner inner--narrow">
+ <div id="preamble">
+<div class="sectionbody">
+<div class="imageblock">
+<div class="content">
+<img src="../_images/blog/apache-cassandra-4.1-features-guardrails-framework-unsplash-jj-ying.jpg" alt="New Guardrails framework">
+</div>
+<div class="title">Image credit: <a href="https://unsplash.com/@jjying" target="_blank" rel="noopener">JJ Ying on Unsplash</a></div>
+</div>
+<div class="paragraph">
+<p>In Apache Cassandra 4.1.0, we are introducing a new framework called Guardrails. The framework helps operators avoid certain configuration and usage pitfalls that can degrade the performance and availability of an Apache Cassandra cluster when taken to scale.</p>
+</div>
+<div class="paragraph">
+<p>For example, on the schema side, users can create too many tables or secondary indexes, leading to excessive use of resources. On the query side, users can run queries touching too many partitions that might involve all nodes in the cluster. Even worse, they can simply run a query using costly replica-side filtering, potentially reading all the table contents into memory on all nodes across the cluster. All these are well-known Cassandra anti-patterns, and administrators have to be vi [...]
+</div>
+<div class="paragraph">
+<p>The new framework allows operators to restrict how Cassandra is used by:</p>
+</div>
+<div class="ulist">
+<ul>
+<li>
+<p>Disabling certain features.</p>
+</li>
+<li>
+<p>Disallowing some specific values.</p>
+</li>
+<li>
+<p>Defining soft and hard limits to certain database magnitudes.</p>
+</li>
+</ul>
+</div>
+</div>
+</div>
+<div class="sect2">
+<h3 id="configuring-guardrails"><a class="anchor" href="#configuring-guardrails"></a>Configuring Guardrails</h3>
+<div class="paragraph">
+<p>Guardrails are defined as regular properties in the Cassandra configuration file, <a href="/doc/latest/cassandra/configuration/cass_yaml_file.html"><code>cassandra.yaml</code></a>. They look like:</p>
+</div>
+<div class="listingblock">
+<div class="content">
+<pre class="highlightjs highlight"><code class="language-asciidoc hljs" data-lang="asciidoc">tables_warn_threshold: -1
+tables_fail_threshold: -1
+secondary_indexes_per_table_warn_threshold: -1
+secondary_indexes_per_table_fail_threshold: -1
+allow_filtering_enabled: true
+partition_keys_in_select_warn_threshold: -1
+partition_keys_in_select_fail_threshold: -1
+collection_size_warn_threshold:
+collection_size_fail_threshold:</code></pre>
+</div>
+</div>
+<div class="paragraph">
+<p>Note that this is not an exhaustive list of all the available guardrails. There are many more, and new ones are under development, but this does give you an idea of the potential options. Note also that all guardrails are disabled by default. When enabled, a guardrail configuration might resemble the following:</p>
+</div>
+<div class="listingblock">
+<div class="content">
+<pre class="highlightjs highlight"><code class="language-asciidoc hljs" data-lang="asciidoc">tables_warn_threshold: 5
+tables_fail_threshold: 10
+secondary_indexes_per_table_warn_threshold: 5
+secondary_indexes_per_table_fail_threshold: 10
+allow_filtering_enabled: false
+partition_keys_in_select_warn_threshold: 10
+partition_keys_in_select_fail_threshold: 20
+collection_size_warn_threshold: 10MiB
+collection_size_fail_threshold: 20MiB</code></pre>
+</div>
+</div>
+<div class="paragraph">
+<p>The guardrails defined in <code>cassandra.yaml</code> are applied as the node starts. It’s also possible to dynamically update the guardrails configuration through JMX at runtime. All guardrails are grouped under the MBean named <code>org.apache.cassandra.db.Guardrails</code>. There are plans to also support dynamically updating guardrails through virtual tables, although this option is not yet available.</p>
+</div>
+</div>
+<div class="sect2">
+<h3 id="guardrails-in-action"><a class="anchor" href="#guardrails-in-action"></a>Guardrails in Action</h3>
+<div class="paragraph">
+<p>Most guardrails are checked at the <a href="/doc/latest/cassandra/cql/index.html">CQL layer</a>, without involving the <a href="/doc/latest/cassandra/architecture/storage_engine.html">storage engine</a> nor <a href="/doc/latest/cassandra/architecture/dynamo.html">additional replicas</a>. Boolean guardrails for disabling features, such as <code>allow_filtering_enabled</code>, abort the operations attempting to use the disabled feature. For example, if the boolean guardrail for queries [...]
+</div>
+<div class="listingblock">
+<div class="content">
+<pre class="highlightjs highlight"><code class="language-asciidoc hljs" data-lang="asciidoc">cqlsh> SELECT * FROM k.t1 WHERE v=0 ALLOW FILTERING;
+InvalidRequest: Error from server: code=2200 [Invalid query] message="Guardrail allow_filtering violated: Querying with ALLOW FILTERING is not allowed"</code></pre>
+</div>
+</div>
+<div class="paragraph">
+<p>Some guardrails have both soft and hard limits. When the soft limit of a guardrail is triggered, it raises a CQL client warning and logs a server-side warning message, but it doesn’t abort the operation. For example, if we have established a soft limit of five tables (<code>tables_warn_threshold: 5</code>) and we try to create a sixth table, we’ll see a warning but the table will still be created:</p>
+</div>
+<div class="listingblock">
+<div class="content">
+<pre class="highlightjs highlight"><code class="language-asciidoc hljs" data-lang="asciidoc">cqlsh> CREATE TABLE k.t6 (k int PRIMARY KEY, v int);
+Warnings :
+Guardrail tables violated: Creating table t6, current number of tables 6 exceeds warning threshold of 5.</code></pre>
+</div>
+</div>
+<div class="paragraph">
+<p>However, if the hard limit is reached, the user operation will be aborted with a <code>GuardrailViolatedException</code>, preventing the potentially harmful operation from happening. Continuing with the previous example, if we have a hard limit of ten tables (<code>tables_warn_threshold: 10</code>) and we try to create an eleventh table, we will see an error and the eleventh table won’t be created:</p>
+</div>
+<div class="listingblock">
+<div class="content">
+<pre class="highlightjs highlight"><code class="language-asciidoc hljs" data-lang="asciidoc">cqlsh> CREATE TABLE k.t11 (k int PRIMARY KEY, v int);
+InvalidRequest: Error from server: code=2200 [Invalid query] message="Guardrail tables violated: Cannot have more than 10 tables, aborting the creation of table t11"</code></pre>
+</div>
+</div>
+<div class="paragraph">
+<p>The triggering of a guardrail will always emit a diagnostic event of type <code>GuardrailEvent</code>. Thus, anyone subscribing to diagnostic events of that type will be able to monitor guardrail violations and trigger any desired actions. Some examples of actions include storing metrics and contacting the offending user, etc.</p>
+</div>
+</div>
+<div class="sect2">
+<h3 id="users-and-extensibility"><a class="anchor" href="#users-and-extensibility"></a>Users and Extensibility</h3>
+<div class="paragraph">
+<p>Guardrails are only applied to the operations of regular users, so they will neither be checked for superuser queries nor internal queries. By default, all regular users are subjected to the same guardrails configuration values defined in <code>cassandra.yaml</code>. However, the configuration for guardrails is an extensible API defined by the interfaces <code>GuardrailsConfig</code> and <code>GuardrailsConfigProvider</code>. These interfaces provide the configurations of every guardr [...]
+</div>
+</div>
+<div class="sect2">
+<h3 id="background-guardrails"><a class="anchor" href="#background-guardrails"></a>Background Guardrails</h3>
+<div class="paragraph">
+<p>In general, guardrails are associated with a specific CQL query. However, due to technical limitations, some guardrails are checked in the background, without being associated with any specific query. That’s the case, for example, with the guardrails for the size or number of items of a <a href="/doc/trunk/cassandra/cql/types.html#collections" target="_blank" rel="noopener">non-frozen collection</a>. Although we can do some checks when a query writes a new collection fragment, we cann [...]
+</div>
+<div class="paragraph">
+<p>Another example of a guardrail that partially runs in the background is the one for disk usage. Its default configuration is:</p>
+</div>
+<div class="listingblock">
+<div class="content">
+<pre class="highlightjs highlight"><code class="language-asciidoc hljs" data-lang="asciidoc">data_disk_usage_percentage_warn_threshold: -1
+data_disk_usage_percentage_fail_threshold: -1
+data_disk_usage_max_disk_size:</code></pre>
+</div>
+</div>
+<div class="paragraph">
+<p>This guardrail is checked by a background task that periodically checks the disk space usage. If the disk usage exceeds the percentage specified in the configuration, the guardrail will emit the proper log messages and diagnostic events, although these won’t be associated with any specific query. However, the disk usage status calculated by the periodic task is tracked and propagated through Gossip, so every node is aware of the disk usage of its peers. This information will be used b [...]
+</div>
+<div class="listingblock">
+<div class="content">
+<pre class="highlightjs highlight"><code class="language-asciidoc hljs" data-lang="asciidoc">cqlsh> INSERT INTO k.t (k, v) VALUES (1, 10);
+InvalidRequest: Error from server: code=2200 [Invalid query] message="Guardrail replica_disk_usage violated: Write request failed because disk usage exceeds failure threshold"</code></pre>
+</div>
+</div>
+</div>
+<div class="sect2">
+<h3 id="expect-more-guardrails"><a class="anchor" href="#expect-more-guardrails"></a>Expect More Guardrails</h3>
+<div class="paragraph">
+<p>Adding new guardrails to Cassandra should be relatively easy since the framework provides base classes for several types of guardrail and utilities for parsing configuration and testing. More importantly, adding new safety checks in the form of guardrails should guarantee that they have a homogeneous, consistent behavior, and that they can benefit from new features that are added for every guardrail.</p>
+</div>
+<div class="paragraph">
+<p>At this time, there are guardrails for:</p>
+</div>
+<div class="ulist">
+<ul>
+<li>
+<p>Number of user keyspaces.</p>
+</li>
+<li>
+<p>Number of user tables.</p>
+</li>
+<li>
+<p>Number of columns per table.</p>
+</li>
+<li>
+<p>Number of secondary indexes per table.</p>
+</li>
+<li>
+<p>Number of materialized tables per table.</p>
+</li>
+<li>
+<p>Number of fields per user-defined type.</p>
+</li>
+<li>
+<p>Number of items in a collection.</p>
+</li>
+<li>
+<p>Number of partition keys selected by an IN restriction.</p>
+</li>
+<li>
+<p>Number of partition keys selected by the cartesian product of multiple IN restrictions.</p>
+</li>
+<li>
+<p>Allowed table properties.</p>
+</li>
+<li>
+<p>Allowed read consistency levels.</p>
+</li>
+<li>
+<p>Allowed write consistency levels.</p>
+</li>
+<li>
+<p>Collections size.</p>
+</li>
+<li>
+<p>Query page size.</p>
+</li>
+<li>
+<p>Minimum replication factor.</p>
+</li>
+<li>
+<p>Data disk usage, defined either as a percentage or as an absolute size.</p>
+</li>
+<li>
+<p>Whether user-defined timestamps are allowed.</p>
+</li>
+<li>
+<p>Whether GROUP BY queries are allowed.</p>
+</li>
+<li>
+<p>Whether the creation of secondary indexes is allowed.</p>
+</li>
+<li>
+<p>Whether the creation of uncompressed tables is allowed.</p>
+</li>
+<li>
+<p>Whether querying with ALLOW FILTERING is allowed.</p>
+</li>
+<li>
+<p>Whether dropping or truncating a table is allowed.</p>
+</li>
+</ul>
+</div>
+<div class="paragraph">
+<p>It is worth mentioning that many of these guardrails were added in the last few months, some of them by newcomers to the project. That, in my opinion, indicates how easy it is to add new guardrails, and we expect to see many more guardrails in the future.</p>
+</div>
+<div class="paragraph">
+<p>If you have ideas for new guardrails, please feel free <a href="https://issues.apache.org/jira/secure/CreateIssue.jspa?pid=12310865&issuetype=4" target="_blank" rel="noopener">to log a ticket</a> with details of your proposal and we would be happy to look into it.</p>
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+ <h1>Apache Cassandra Changelog #1</h1>
+ <h3>October 28, 2020 | The Apache Cassandra Community</h3>
+ </div>
+ </div>
+ <div id="blog-post" class="flex-center py-large arrow">
+ <div class="blog-breadcrumb mb-medium">
+ <div class="inner inner--narrow">
+ <a href="/_/blog.html">« Back to the Apache Cassandra Blog</a>
+ </div>
+ </div>
+ <div class="post-content">
+ <div class="inner inner--narrow">
+ <div id="preamble">
+<div class="sectionbody">
+<div class="imageblock">
+<div class="content">
+<img src="../_images/blog/changelog_header.jpg" alt="Apache Cassandra Changelog">
+</div>
+</div>
+<div class="paragraph">
+<p>Our monthly roundup of key activities and knowledge to keep the community informed.</p>
+</div>
+</div>
+</div>
+<div class="sect1">
+<h2 id="release-notes"><a class="anchor" href="#release-notes"></a>Release Notes</h2>
+<div class="sectionbody">
+<div class="sect2">
+<h3 id="released"><a class="anchor" href="#released"></a>Released</h3>
+<div class="paragraph">
+<p>The most current Apache Cassandra releases are 4.0-beta2, 3.11.8, 3.0.22, 2.2.18 and 2.1.22 released on August 31 and are <a href="../download.html" class="page">in the repositories</a>. The next cut of releases will be out soon.</p>
+</div>
+<div class="paragraph">
+<p>Join the Cassandra <a href="../community.html#discussions" class="page">mailing list</a> to stay updated.</p>
+</div>
+<div class="paragraph">
+<p>We continue to make progress toward the 4.0 GA release with the overarching goal of it being at a state where major users should feel confident running it in production when it is cut. Over 1,300 Jira tickets have been closed and <a href="https://issues.apache.org/jira/projects/CASSANDRA/versions/12346094" target="_blank" rel="noopener">less than 100</a> remain as of this post. To gain this confidence, there are various ongoing testing efforts involving correctness, performance, and e [...]
+</div>
+</div>
+<div class="sect2">
+<h3 id="added"><a class="anchor" href="#added"></a>Added</h3>
+<div class="paragraph">
+<p>With CASSANDRA-15013, the community improved Cassandra’s ability to <a href="Improving-Apache-Cassandras-Front-Door-and-Backpressure.html" class="page">handle high throughput workloads</a>, while having enough safeguards in place to protect itself from potentially going out of memory.</p>
+</div>
+</div>
+<div class="sect2">
+<h3 id="added-2"><a class="anchor" href="#added-2"></a>Added</h3>
+<div class="paragraph">
+<p>The <a href="https://github.com/apache/cassandra-harry/blob/master/README.md" target="_blank" rel="noopener">Harry project</a> is a fuzz testing tool that aims to generate reproducible workloads that are as close to real-life as possible, while being able to efficiently verify the cluster state against the model without pausing the workload itself.</p>
+</div>
+ <div class="twitter-tweet twitter-tweet-rendered" style="display: flex; max-width: 550px; width: 100%; margin-top: 10px; margin-bottom: 10px;"><iframe id="twitter-widget-2" scrolling="no" frameborder="0" allowtransparency="true" allowfullscreen="true" class="" style="position: static; visibility: visible; width: 550px; height: 345px; display: block; flex-grow: 1;" title="Twitter Tweet" src="https://platform.twitter.com/embed/Tweet.html?dnt=false&embedId=twitter-widget-2&frame=fa [...]
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+</div>
+<div class="sect2">
+<h3 id="added-3"><a class="anchor" href="#added-3"></a>Added</h3>
+<div class="paragraph">
+<p>The community published its first <a href="Apache-Cassandra-Usage-Report-2020.html" class="page">Apache Cassandra Usage Report 2020</a> detailing findings from a comprehensive global survey of 901 practitioners on Cassandra usage to provide a baseline understanding of who, how, and why organizations use Cassandra.</p>
+</div>
+</div>
+</div>
+</div>
+<div class="sect1">
+<h2 id="community-notes"><a class="anchor" href="#community-notes"></a>Community Notes</h2>
+<div class="sectionbody">
+<div class="paragraph">
+<p><em>Updates on Cassandra Enhancement Proposals (CEPs), how to contribute, and other community activities.</em></p>
+</div>
+<div class="sect2">
+<h3 id="added-4"><a class="anchor" href="#added-4"></a>Added</h3>
+<div class="paragraph">
+<p><a href="https://cwiki.apache.org/confluence/display/CASSANDRA/CEP-7%3A+Storage+Attached+Index" target="_blank" rel="noopener">CEP-7: Storage Attached Index (SAI)</a> is a new secondary index for Cassandra that builds on the advancements made with SASI. It is intended to replace the existing built-in secondary index implementations.</p>
+</div>
+</div>
+<div class="sect2">
+<h3 id="added-5"><a class="anchor" href="#added-5"></a>Added</h3>
+<div class="paragraph">
+<p>Cassandra was selected by the ASF Diversity & Inclusion committee to be <a href="https://lists.apache.org/thread.html/rfa1673c9f8b42cf286f5fb763eb987eced2bdea1a619358869a49bef%40%3Cdev.cassandra.apache.org%3E" target="_blank" rel="noopener">included in a research project</a> to evaluate and understand the current state of diversity.</p>
+</div>
+</div>
+<div class="sect2">
+<h3 id="changed"><a class="anchor" href="#changed"></a>Changed</h3>
+<div class="paragraph">
+<p><a href="https://cwiki.apache.org/confluence/display/CASSANDRA/CEP-2+Kubernetes+Operator" target="_blank" rel="noopener">CEP-2: Kubernetes Operator</a> was introduced this year and is an active discussion on creation of a community-based operator with the goal of making it easy to run Cassandra on Kubernetes.</p>
+</div>
+</div>
+</div>
+</div>
+<div class="sect1">
+<h2 id="user-space"><a class="anchor" href="#user-space"></a>User Space</h2>
+<div class="sectionbody">
+<div class="sect2">
+<h3 id="bigmate"><a class="anchor" href="#bigmate"></a>Bigmate</h3>
+<div class="paragraph">
+<p>"In vetting MySQL, MongoDB, and other potential databases for IoT scale, we found they couldn’t match the scalability we could get with open source Apache Cassandra. Cassandra’s built-for-scale architecture enables us to handle millions of operations or concurrent users each second with ease – making it ideal for IoT deployments." - <a href="https://www.iotcentral.io/blog/how-open-source-apache-cassandra-solved-our-iot-scalability-and-r" target="_blank" rel="noopener">Bret [...]
+</div>
+</div>
+<div class="sect2">
+<h3 id="bloomberg"><a class="anchor" href="#bloomberg"></a>Bloomberg</h3>
+<div class="paragraph">
+<p>"Our group is working on a multi-year build, creating a new Index Construction Platform to handle the daily production of the Bloomberg Barclays fixed income indices. This involves building and productionizing an Apache Solr-backed search platform to handle thousands of searches per minute, an Apache Cassandra back-end database to store millions of data points per day, and a distributed computational engine to handle millions of computations daily." - <a href="https://www.techatbloomb [...]
+</div>
+<div class="paragraph">
+<p><em>Do you have a Cassandra case study to share? Email <a href="mailto:cassandra@constantia.io">cassandra@constantia.io</a></em>.</p>
+</div>
+</div>
+</div>
+</div>
+<div class="sect1">
+<h2 id="in-the-news"><a class="anchor" href="#in-the-news"></a>In the News</h2>
+<div class="sectionbody">
+<div class="paragraph">
+<p>Solutions Review: <a href="https://solutionsreview.com/data-management/the-five-best-apache-cassandra-books-on-our-reading-list/" target="_blank" rel="noopener">The Five Best Apache Cassandra Books on Our Reading List</a></p>
+</div>
+<div class="paragraph">
+<p>ZDNet: <a href="https://www.zdnet.com/article/what-cassandra-users-think-of-their-nosql-dbms/" target="_blank" rel="noopener">What Cassandra users think of their NoSQL DBMS</a></p>
+</div>
+<div class="paragraph">
+<p>Datanami: <a href="https://www.datanami.com/2020/09/22/cassandra-adoption-correlates-with-experience/" target="_blank" rel="noopener">Cassandra Adoption Correlates with Experience</a></p>
+</div>
+<div class="paragraph">
+<p>Container Journal: <a href="https://containerjournal.com/topics/container-management/5-to-1-an-overview-of-apache-cassandra-kubernetes-operators/" target="_blank" rel="noopener">5 to 1: An Overview of Apache Cassandra Kubernetes Operators</a></p>
+</div>
+<div class="paragraph">
+<p>Datanami: Cassandra Gets Monitoring, <a href="https://www.datanami.com/2020/07/21/cassandra-gets-monitoring-performance-upgrades/" target="_blank" rel="noopener">Performance Upgrades</a></p>
+</div>
+<div class="paragraph">
+<p>ZDNet: Faster than ever, <a href="https://www.zdnet.com/article/faster-than-ever-apache-cassandra-4-0-beta-is-on-its-way/" target="_blank" rel="noopener">Apache Cassandra 4.0 beta is on its way</a></p>
+</div>
+</div>
+</div>
+<div class="sect1">
+<h2 id="cassandra-tutorials-more"><a class="anchor" href="#cassandra-tutorials-more"></a>Cassandra Tutorials & More</h2>
+<div class="sectionbody">
+<div class="paragraph">
+<p>A Cassandra user was in search of a tool to perform schema DDL upgrades. Another user suggested <a href="https://github.com/patka/cassandra-migration" target="_blank" rel="noopener">https://github.com/patka/cassandra-migration</a> to ensure you don’t get schema mismatches if running multiple upgrade statements in one migration. See the <a href="https://lists.apache.org/thread.html/rdfee145c4c5d920f644c6bcd081c6fb446d52b055c133485217b8143%40%3Cuser.cassandra.apache.org%3E" target [...]
+</div>
+<div class="paragraph">
+<p><a href="https://opensource.com/article/20/10/virtual-tables-apache-cassandra" target="_blank" rel="noopener">Start using virtual tables in Apache Cassandra 4.0</a> - Ben Bromhead, Instaclustr</p>
+</div>
+<div class="paragraph">
+<p><a href="https://pkolaczk.github.io/benchmarking-cassandra/" target="_blank" rel="noopener">Benchmarking Apache Cassandra with Rust</a> - Piotr Kołaczkowski, DataStax</p>
+</div>
+<div class="paragraph">
+<p><a href="https://blog.anant.us/open-source-bi-tools-and-cassandra/" target="_blank" rel="noopener">Open Source BI Tools and Cassandra</a> - Arpan Patel, Anant Corporation</p>
+</div>
+<div class="paragraph">
+<p><a href="https://dzone.com/articles/build-fault-tolerant-applications-with-cassandra-a" target="_blank" rel="noopener">Build Fault Tolerant Applications With Cassandra API for Azure Cosmos DB</a> - Abhishek Gupta, Microsoft</p>
+</div>
+<div class="paragraph">
+<p><a href="https://www.red-gate.com/simple-talk/blogs/understanding-data-modifications-in-cassandra/" target="_blank" rel="noopener">Understanding Data Modifications in Cassandra</a> - Sameer Shukla, Redgate</p>
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+ <h1>Apache Cassandra Changelog #10</h1>
+ <h3>October 5, 2021 | The Apache Cassandra Community</h3>
+ </div>
+ </div>
+ <div id="blog-post" class="flex-center py-large arrow">
+ <div class="blog-breadcrumb mb-medium">
+ <div class="inner inner--narrow">
+ <a href="/_/blog.html">« Back to the Apache Cassandra Blog</a>
+ </div>
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+ <div class="inner inner--narrow">
+ <div id="preamble">
+<div class="sectionbody">
+<div class="imageblock">
+<div class="content">
+<img src="../_images/blog/changelog_header.jpg" alt="Apache Cassandra Changelog">
+</div>
+</div>
+<div class="paragraph">
+<p>Our monthly roundup of key activities and knowledge to keep the community informed.</p>
+</div>
+</div>
+</div>
+<div class="sect1">
+<h2 id="release-notes"><a class="anchor" href="#release-notes"></a>Release Notes</h2>
+<div class="sectionbody">
+<div class="sect2">
+<h3 id="released"><a class="anchor" href="#released"></a>Released</h3>
+<div class="paragraph">
+<p>The latest release of Apache Cassandra is <a href="https://www.apache.org/dyn/closer.lua/cassandra/4.0.1" target="_blank" rel="noopener">4.0.1</a> (<a href="https://archive.apache.org/dist/cassandra/4.0.1/apache-cassandra-4.0.1-bin.tar.gz.asc" target="_blank" rel="noopener">pgp</a>, <a href="https://archive.apache.org/dist/cassandra/4.0.1/apache-cassandra-4.0.1-bin.tar.gz.sha256" target="_blank" rel="noopener">sha256</a>, and <a href="https://archive.apache.org/dist/cassandra/4.0.1/ap [...]
+</div>
+<div class="paragraph">
+<p>Note: As the docs are not yet updated, the bintray location for Debian users is replaced with the <a href="https://apache.jfrog.io/artifactory/cassandra/" target="_blank" rel="noopener">ASF’s JFrog Artifactory location</a>.</p>
+</div>
+<div class="paragraph">
+<p>See the <a href="/download/">download section</a> for the latest stable and older supported versions of source and binary distributions.</p>
+</div>
+<div class="paragraph">
+<p>To stay up-to-date, we recommend joining the Cassandra <a href="../community.html#join-the-conversation" class="page">mailing list</a>.</p>
+</div>
+</div>
+</div>
+</div>
+<div class="sect1">
+<h2 id="community-notes"><a class="anchor" href="#community-notes"></a>Community Notes</h2>
+<div class="sectionbody">
+<div class="paragraph">
+<p><em>Updates on Cassandra Enhancement Proposals (CEPs), how to contribute, and other community activities.</em></p>
+</div>
+<div class="paragraph">
+<p><em>Are you new to the project? We have established a <a href="https://issues.apache.org/jira/secure/RapidBoard.jspa?rapidView=484" target="_blank" rel="noopener">New Release tracking Kanboard</a> and a <a href="https://issues.apache.org/jira/secure/RapidBoard.jspa?rapidView=484&quickFilter=2162&quickFilter=2160" target="_blank" rel="noopener">Starter Tickets</a> quick label that corresponds to our Low Hanging Fruit status. Any of these tickets should be of appropriate complex [...]
+</div>
+<div class="paragraph">
+<p>Read PMC member Josh McKenzie’s <a href="https://lists.apache.org/list.html?dev@cassandra.apache.org:2021-9" target="_blank" rel="noopener">bi-weekly update</a> for ongoing discussions and the latest on ticket progress.</p>
+</div>
+<div class="sect2">
+<h3 id="added"><a class="anchor" href="#added"></a>Added</h3>
+<div class="paragraph">
+<p>The Project Management Committee (PMC) is pleased to announce that <strong>Aleksei Zotov</strong> has been invited to <a href="https://lists.apache.org/thread.html/r6ff82e48720931055f5eb0bc494434f5be7959ef78345a642a980419%40%3Cdev.cassandra.apache.org%3E" target="_blank" rel="noopener">become a committer</a>, and he has accepted! Thank you for all your contributions over the years, Aleksei, and congratulations! 👏</p>
+</div>
+</div>
+<div class="sect2">
+<h3 id="discussed"><a class="anchor" href="#discussed"></a>Discussed</h3>
+<div class="paragraph">
+<p>After the release of Apache Cassandra 4.0, we have many proposed features (Cassandra Enhancement Proposals or CEPs) under discussion, such as <a href="https://lists.apache.org/thread.html/r33b3040ad0cd874b0ac53d290b6f4f2ecba19a0309c861fc2ee3336d%40%3Cdev.cassandra.apache.org%3E" target="_blank" rel="noopener">CEP-15: General Purpose Transactions</a> and <a href="https://lists.apache.org/thread.html/r895f4b4db7e27dfe36fa404152dcd6c8fe43ff3529079e55399cf3c5%40%3Cdev.cassandra.apache.org [...]
+</div>
+</div>
+<div class="sect2">
+<h3 id="passed"><a class="anchor" href="#passed"></a>Passed</h3>
+<div class="paragraph">
+<p><a href="https://lists.apache.org/thread.html/rb5e950f882196764744c31bc3c13dfbf0603cb9f8bc2f6cfb976d285%40%3Cdev.cassandra.apache.org%3E" target="_blank" rel="noopener">CEP-11</a> has passed. This proposal aims to enable users to select a memtable implementation suitable for their workload and hardware, including long-lived and persistent memtables. More details are on the <a href="https://cwiki.apache.org/confluence/display/CASSANDRA/CEP-11%3A+Pluggable+memtable+implementations" targ [...]
+</div>
+</div>
+<div class="sect2">
+<h3 id="passed-2"><a class="anchor" href="#passed-2"></a>Passed</h3>
+<div class="paragraph">
+<p>The vote for CEP-13 has also <a href="https://lists.apache.org/thread.html/re374669ffc9c1cd6a647b43a67b24eb1b1fe9b2136c76618707acaa1%40%3Cdev.cassandra.apache.org%3E" target="_blank" rel="noopener">passed</a>. This is to add a <a href="https://cwiki.apache.org/confluence/display/CASSANDRA/CEP-13%3A+Denylisting+partitions" target="_blank" rel="noopener">DenyListing partitions</a> feature, enabling operators to disallow the reading of specific partition keys that could cause undesirable [...]
+</div>
+</div>
+<div class="sect2">
+<h3 id="proposed"><a class="anchor" href="#proposed"></a>Proposed</h3>
+<div class="paragraph">
+<p>We have a formal proposal from Brian Houser for <a href="https://lists.apache.org/thread.html/ree85077637f14435e9eb14e0db887d2e9d94e956ccbf1e1ac9d53aa2%40%3Cdev.cassandra.apache.org%3E" target="_blank" rel="noopener">CEP-16: Auth Plugin Support for CQLSH</a>. This will ensure that CQLSH has the same support for different authentication methods that we have for other Cassandra drivers. For more details, read the <a href="https://cwiki.apache.org/confluence/display/CASSANDRA/CEP-16%3A+A [...]
+</div>
+</div>
+<div class="sect2">
+<h3 id="discussed-2"><a class="anchor" href="#discussed-2"></a>Discussed</h3>
+<div class="paragraph">
+<p>As always, there are lots of discussions going on. Ekaterina Dimitrova started a good conversation on <a href="https://lists.apache.org/thread.html/r507be1624a568765f9d5ec5f6b561885129d0aaeb982e9bd9bf5e01b%40%3Cdev.cassandra.apache.org%3E" target="_blank" rel="noopener">standardizing configuration and JVM parameters</a> and drove a discussion on <a href="https://lists.apache.org/list.html?dev@cassandra.apache.org:2021-8" target="_blank" rel="noopener">JDK 17 support</a>, which is now [...]
+</div>
+</div>
+<div class="sect2">
+<h3 id="added-2"><a class="anchor" href="#added-2"></a>Added</h3>
+<div class="paragraph">
+<p>The latest release of <a href="https://drill.apache.org/download/" target="_blank" rel="noopener">Apache Drill 1.19</a>, an open source tool that enables end-users to query multiple data sources using SQL, now includes a <a href="https://issues.apache.org/jira/browse/DRILL-92" target="_blank" rel="noopener">Cassandra plugin</a>.</p>
+</div>
+</div>
+<div class="sect2">
+<h3 id="changed"><a class="anchor" href="#changed"></a>Changed</h3>
+<div class="paragraph">
+<p>The Kubernetes SIG has decided to move away from bi-weekly meetings as the original reasons for running them have been met. The SIG will be moving to a meetup-style gathering where users will share information and exchange ideas. If you want to share something at the next gathering, please contact Patrick McFadin on the <a href="https://the-asf.slack.com/archives/C014SSUAL9E" target="_blank" rel="noopener">cassandra-kubernetes</a> Slack channel.</p>
+</div>
+</div>
+</div>
+</div>
+<div class="sect1">
+<h2 id="user-space"><a class="anchor" href="#user-space"></a>User Space</h2>
+<div class="sectionbody">
+<div class="sect2">
+<h3 id="capital-one"><a class="anchor" href="#capital-one"></a>Capital One</h3>
+<div class="paragraph">
+<p>“We have modeled customer rewards data in Capital One using Apache Cassandra to serve real-time microservice-based workloads (customers accessing their rewards online) and batch Apache Spark workloads (customer statements) at the same time.” - <a href="https://www.youtube.com/watch?v=gtrRY7XziXU" target="_blank" rel="noopener">Gokul Prabagaren</a></p>
+</div>
+</div>
+<div class="sect2">
+<h3 id="glassdoor"><a class="anchor" href="#glassdoor"></a>Glassdoor</h3>
+<div class="paragraph">
+<p>“At Glassdoor, we use Cassandra to store various datasets needed by search, machine learning models, and other systems. Since most of these systems are built on Java, we use Java drivers for Cassandra, for read, write and delete operations.” - <a href="https://medium.com/glassdoor-engineering/cassandra-driver-configuration-for-improved-performance-and-load-balancing-1b0106ce12bb" target="_blank" rel="noopener">Ravi Varsha</a></p>
+</div>
+<div class="paragraph">
+<p><em>Do you have a Cassandra case study to share? Email <a href="mailto:cassandra@constantia.io">cassandra@constantia.io</a></em>.</p>
+</div>
+</div>
+</div>
+</div>
+<div class="sect1">
+<h2 id="in-the-news"><a class="anchor" href="#in-the-news"></a>In the News</h2>
+<div class="sectionbody">
+<div class="paragraph">
+<p>CIO.com: <a href="https://www.cio.com/article/3631494/hands-on-it-skills-pay-off-more-than-certs-study-says.html" target="_blank" rel="noopener">Hands-on IT Skills Pay off More than Certs</a></p>
+</div>
+<div class="paragraph">
+<p>Datanami: <a href="https://www.datanami.com/2021/08/17/whos-winning-in-open-source-data-tech/" target="_blank" rel="noopener">Who’s Winning in Open Source Data Tech?</a></p>
+</div>
+<div class="paragraph">
+<p>InfoWorld: <a href="https://www.infoworld.com/article/3628461/the-long-long-reigns-of-popular-databases.html" target="_blank" rel="noopener">The Long</a></p>
+</div>
+<div class="paragraph">
+<p>TFiR: <a href="https://www.tfir.io/instaclustr-offers-apache-cassandra-4-0-on-its-managed-platform/" target="_blank" rel="noopener">Instaclustr Offers Apache Cassandra 4.0 On Its Managed Platform</a></p>
+</div>
+</div>
+</div>
+<div class="sect1">
+<h2 id="cassandra-tutorials-more"><a class="anchor" href="#cassandra-tutorials-more"></a>Cassandra Tutorials & More</h2>
+<div class="sectionbody">
+<div class="paragraph">
+<p><a href="https://www.youtube.com/watch?v=3UP151FMMzo" target="_blank" rel="noopener">Cassandra Powered Workflows To Automate At Scale</a> - Maciej Swiderski</p>
+</div>
+<div class="paragraph">
+<p><a href="https://www.infoq.com/presentations/netflix-cdc-events-cassandra/" target="_blank" rel="noopener">Change Data Capture for Distributed Databases @Netflix</a> - Raghuram Onti Srinivasan</p>
+</div>
+<div class="paragraph">
+<p><a href="https://www.youtube.com/watch?v=F0ilF4b7tUU" target="_blank" rel="noopener">Where Apache Cassandra Fits in Your Data Platform</a> - Mick Semb Wever</p>
+</div>
+<div class="paragraph">
+<p><a href="https://blog.anant.us/apache-cassandra-lunch-62-grafana-dashboard-for-apache-cassandra/" target="_blank" rel="noopener">Apache Cassandra Lunch #62: Grafana Dashboard for Apache Cassandra</a> - Sarma Pydipally</p>
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