You are viewing a plain text version of this content. The canonical link for it is here.
Posted to commits@hbase.apache.org by gi...@apache.org on 2018/04/12 14:50:00 UTC
[46/51] [partial] hbase-site git commit: Published site at
2912c953551bedbfbf30c32c156ed7bb187d54c3.
http://git-wip-us.apache.org/repos/asf/hbase-site/blob/d220bc5e/apidocs/org/apache/hadoop/hbase/mapreduce/CellCounter.html
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<span class="sourceLineNo">228</span> + "-Dhbase.client.scanner.caching=100\n"<a name="line.228"></a>
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+<span class="sourceLineNo">357</span> System.err.println("<tableMappings> is a comma separated list of target tables.");<a name="line.357"></a>
<span class="sourceLineNo">358</span> System.err.println("If specified, each table in <tables> must have a mapping.\n");<a name="line.358"></a>
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-<span class="sourceLineNo">360</span> System.err.println("To generate HFiles for a bulk data load instead, pass the option:");<a name="line.360"></a>
+<span class="sourceLineNo">360</span> System.err.println("To generate HFiles for a bulk data load instead, pass the following option:");<a name="line.360"></a>
<span class="sourceLineNo">361</span> System.err.println(" -D" + BULK_OUTPUT_CONF_KEY + "=/path/for/output");<a name="line.361"></a>
<span class="sourceLineNo">362</span> System.err.println(" (Only one table can be specified, and no mapping is allowed!)");<a name="line.362"></a>
-<span class="sourceLineNo">363</span> System.err.println("Other options: (specify time range to WAL edit to consider)");<a name="line.363"></a>
+<span class="sourceLineNo">363</span> System.err.println("Time range options:");<a name="line.363"></a>
<span class="sourceLineNo">364</span> System.err.println(" -D" + WALInputFormat.START_TIME_KEY + "=[date|ms]");<a name="line.364"></a>
<span class="sourceLineNo">365</span> System.err.println(" -D" + WALInputFormat.END_TIME_KEY + "=[date|ms]");<a name="line.365"></a>
-<span class="sourceLineNo">366</span> System.err.println(" -D " + JOB_NAME_CONF_KEY<a name="line.366"></a>
-<span class="sourceLineNo">367</span> + "=jobName - use the specified mapreduce job name for the wal player");<a name="line.367"></a>
-<span class="sourceLineNo">368</span> System.err.println("For performance also consider the following options:\n"<a name="line.368"></a>
-<span class="sourceLineNo">369</span> + " -Dmapreduce.map.speculative=false\n" + " -Dmapreduce.reduce.speculative=false");<a name="line.369"></a>
-<span class="sourceLineNo">370</span> }<a name="line.370"></a>
-<span class="sourceLineNo">371</span><a name="line.371"></a>
-<span class="sourceLineNo">372</span> /**<a name="line.372"></a>
-<span class="sourceLineNo">373</span> * Main entry point.<a name="line.373"></a>
-<span class="sourceLineNo">374</span> * @param args The command line parameters.<a name="line.374"></a>
-<span class="sourceLineNo">375</span> * @throws Exception When running the job fails.<a name="line.375"></a>
-<span class="sourceLineNo">376</span> */<a name="line.376"></a>
-<span class="sourceLineNo">377</span> public static void main(String[] args) throws Exception {<a name="line.377"></a>
-<span class="sourceLineNo">378</span> int ret = ToolRunner.run(new WALPlayer(HBaseConfiguration.create()), args);<a name="line.378"></a>
-<span class="sourceLineNo">379</span> System.exit(ret);<a name="line.379"></a>
-<span class="sourceLineNo">380</span> }<a name="line.380"></a>
-<span class="sourceLineNo">381</span><a name="line.381"></a>
-<span class="sourceLineNo">382</span> @Override<a name="line.382"></a>
-<span class="sourceLineNo">383</span> public int run(String[] args) throws Exception {<a name="line.383"></a>
-<span class="sourceLineNo">384</span> if (args.length < 2) {<a name="line.384"></a>
-<span class="sourceLineNo">385</span> usage("Wrong number of arguments: " + args.length);<a name="line.385"></a>
-<span class="sourceLineNo">386</span> System.exit(-1);<a name="line.386"></a>
-<span class="sourceLineNo">387</span> }<a name="line.387"></a>
-<span class="sourceLineNo">388</span> Job job = createSubmittableJob(args);<a name="line.388"></a>
-<span class="sourceLineNo">389</span> return job.waitForCompletion(true) ? 0 : 1;<a name="line.389"></a>
-<span class="sourceLineNo">390</span> }<a name="line.390"></a>
-<span class="sourceLineNo">391</span>}<a name="line.391"></a>
+<span class="sourceLineNo">366</span> System.err.println(" (The start and the end date of timerange. The dates can be expressed");<a name="line.366"></a>
+<span class="sourceLineNo">367</span> System.err.println(" in milliseconds since epoch or in yyyy-MM-dd'T'HH:mm:ss.SS format.");<a name="line.367"></a>
+<span class="sourceLineNo">368</span> System.err.println(" E.g. 1234567890120 or 2009-02-13T23:32:30.12)");<a name="line.368"></a>
+<span class="sourceLineNo">369</span> System.err.println("Other options:");<a name="line.369"></a>
+<span class="sourceLineNo">370</span> System.err.println(" -D" + JOB_NAME_CONF_KEY + "=jobName");<a name="line.370"></a>
+<span class="sourceLineNo">371</span> System.err.println(" Use the specified mapreduce job name for the wal player");<a name="line.371"></a>
+<span class="sourceLineNo">372</span> System.err.println("For performance also consider the following options:\n"<a name="line.372"></a>
+<span class="sourceLineNo">373</span> + " -Dmapreduce.map.speculative=false\n"<a name="line.373"></a>
+<span class="sourceLineNo">374</span> + " -Dmapreduce.reduce.speculative=false");<a name="line.374"></a>
+<span class="sourceLineNo">375</span> }<a name="line.375"></a>
+<span class="sourceLineNo">376</span><a name="line.376"></a>
+<span class="sourceLineNo">377</span> /**<a name="line.377"></a>
+<span class="sourceLineNo">378</span> * Main entry point.<a name="line.378"></a>
+<span class="sourceLineNo">379</span> * @param args The command line parameters.<a name="line.379"></a>
+<span class="sourceLineNo">380</span> * @throws Exception When running the job fails.<a name="line.380"></a>
+<span class="sourceLineNo">381</span> */<a name="line.381"></a>
+<span class="sourceLineNo">382</span> public static void main(String[] args) throws Exception {<a name="line.382"></a>
+<span class="sourceLineNo">383</span> int ret = ToolRunner.run(new WALPlayer(HBaseConfiguration.create()), args);<a name="line.383"></a>
+<span class="sourceLineNo">384</span> System.exit(ret);<a name="line.384"></a>
+<span class="sourceLineNo">385</span> }<a name="line.385"></a>
+<span class="sourceLineNo">386</span><a name="line.386"></a>
+<span class="sourceLineNo">387</span> @Override<a name="line.387"></a>
+<span class="sourceLineNo">388</span> public int run(String[] args) throws Exception {<a name="line.388"></a>
+<span class="sourceLineNo">389</span> if (args.length < 2) {<a name="line.389"></a>
+<span class="sourceLineNo">390</span> usage("Wrong number of arguments: " + args.length);<a name="line.390"></a>
+<span class="sourceLineNo">391</span> System.exit(-1);<a name="line.391"></a>
+<span class="sourceLineNo">392</span> }<a name="line.392"></a>
+<span class="sourceLineNo">393</span> Job job = createSubmittableJob(args);<a name="line.393"></a>
+<span class="sourceLineNo">394</span> return job.waitForCompletion(true) ? 0 : 1;<a name="line.394"></a>
+<span class="sourceLineNo">395</span> }<a name="line.395"></a>
+<span class="sourceLineNo">396</span>}<a name="line.396"></a>
http://git-wip-us.apache.org/repos/asf/hbase-site/blob/d220bc5e/book.html
----------------------------------------------------------------------
diff --git a/book.html b/book.html
index 8269c24..f963820 100644
--- a/book.html
+++ b/book.html
@@ -1340,7 +1340,7 @@ You can still test the behavior of the primary Master or a RegionServer by killi
<div class="content">
This chapter expands upon the <a href="#getting_started">Getting Started</a> chapter to further explain configuration of Apache HBase.
Please read this chapter carefully, especially the <a href="#basic.prerequisites">Basic Prerequisites</a>
-to ensure that your HBase testing and deployment goes smoothly, and prevent data loss.
+to ensure that your HBase testing and deployment goes smoothly.
Familiarize yourself with <a href="#hbase_supported_tested_definitions">Support and Testing Expectations</a> as well.
</div>
</div>
@@ -1564,10 +1564,10 @@ You must set <code>JAVA_HOME</code> on each node of your cluster. <em>hbase-env.
<p>For example, assuming that a schema had 3 ColumnFamilies per region with an average of 3 StoreFiles per ColumnFamily, and there are 100 regions per RegionServer, the JVM will open <code>3 * 3 * 100 = 900</code> file descriptors, not counting open JAR files, configuration files, and others. Opening a file does not take many resources, and the risk of allowing a user to open too many files is minimal.</p>
</div>
<div class="paragraph">
-<p>Another related setting is the number of processes a user is allowed to run at once. In Linux and Unix, the number of processes is set using the <code>ulimit -u</code> command. This should not be confused with the <code>nproc</code> command, which controls the number of CPUs available to a given user. Under load, a <code>ulimit -u</code> that is too low can cause OutOfMemoryError exceptions. See Jack Levin’s major HDFS issues thread on the hbase-users mailing list, from 2011.</p>
+<p>Another related setting is the number of processes a user is allowed to run at once. In Linux and Unix, the number of processes is set using the <code>ulimit -u</code> command. This should not be confused with the <code>nproc</code> command, which controls the number of CPUs available to a given user. Under load, a <code>ulimit -u</code> that is too low can cause OutOfMemoryError exceptions.</p>
</div>
<div class="paragraph">
-<p>Configuring the maximum number of file descriptors and processes for the user who is running the HBase process is an operating system configuration, rather than an HBase configuration. It is also important to be sure that the settings are changed for the user that actually runs HBase. To see which user started HBase, and that user’s ulimit configuration, look at the first line of the HBase log for that instance. A useful read setting config on your hadoop cluster is Aaron Kimball’s Configuration Parameters: What can you just ignore?</p>
+<p>Configuring the maximum number of file descriptors and processes for the user who is running the HBase process is an operating system configuration, rather than an HBase configuration. It is also important to be sure that the settings are changed for the user that actually runs HBase. To see which user started HBase, and that user’s ulimit configuration, look at the first line of the HBase log for that instance.</p>
</div>
<div class="exampleblock">
<div class="title">Example 5. <code>ulimit</code> Settings on Ubuntu</div>
@@ -1622,7 +1622,8 @@ See <a href="https://wiki.apache.org/hadoop/Distributions%20and%20Commercial%20S
<td class="content">
<div class="title">Hadoop 2.x is recommended.</div>
<div class="paragraph">
-<p>Hadoop 2.x is faster and includes features, such as short-circuit reads, which will help improve your HBase random read profile.
+<p>Hadoop 2.x is faster and includes features, such as short-circuit reads (see <a href="#perf.hdfs.configs.localread">Leveraging local data</a>),
+which will help improve your HBase random read profile.
Hadoop 2.x also includes important bug fixes that will improve your overall HBase experience. HBase does not support running with
earlier versions of Hadoop. See the table below for requirements specific to different HBase versions.</p>
</div>
@@ -1709,12 +1710,18 @@ earlier versions of Hadoop. See the table below for requirements specific to dif
<td class="tableblock halign-left valign-top"><p class="tableblock">X</p></td>
</tr>
<tr>
-<td class="tableblock halign-left valign-top"><p class="tableblock">Hadoop-2.8.2+</p></td>
+<td class="tableblock halign-left valign-top"><p class="tableblock">Hadoop-2.8.2</p></td>
<td class="tableblock halign-left valign-top"><p class="tableblock">NT</p></td>
<td class="tableblock halign-left valign-top"><p class="tableblock">NT</p></td>
<td class="tableblock halign-left valign-top"><p class="tableblock">NT</p></td>
</tr>
<tr>
+<td class="tableblock halign-left valign-top"><p class="tableblock">Hadoop-2.8.3+</p></td>
+<td class="tableblock halign-left valign-top"><p class="tableblock">NT</p></td>
+<td class="tableblock halign-left valign-top"><p class="tableblock">NT</p></td>
+<td class="tableblock halign-left valign-top"><p class="tableblock">S</p></td>
+</tr>
+<tr>
<td class="tableblock halign-left valign-top"><p class="tableblock">Hadoop-2.9.0</p></td>
<td class="tableblock halign-left valign-top"><p class="tableblock">X</p></td>
<td class="tableblock halign-left valign-top"><p class="tableblock">X</p></td>
@@ -1773,7 +1780,7 @@ data loss. This patch is present in Apache Hadoop releases 2.6.1+.</p>
<td class="content">
<div class="title">Hadoop 2.y.0 Releases</div>
<div class="paragraph">
-<p>Starting around the time of Hadoop version 2.7.0, the Hadoop PMC got into the habit of calling out new minor releases on their major version 2 release line as not stable / production ready. As such, HBase expressly advises downstream users to avoid running on top of these releases. Note that additionally the 2.8.1 was release was given the same caveat by the Hadoop PMC. For reference, see the release announcements for <a href="https://s.apache.org/hadoop-2.7.0-announcement">Apache Hadoop 2.7.0</a>, <a href="https://s.apache.org/hadoop-2.8.0-announcement">Apache Hadoop 2.8.0</a>, <a href="https://s.apache.org/hadoop-2.8.1-announcement">Apache Hadoop 2.8.1</a>, and <a href="https://s.apache.org/hadoop-2.9.0-announcement">Apache Hadoop 2.9.0</a>.</p>
+<p>Starting around the time of Hadoop version 2.7.0, the Hadoop PMC got into the habit of calling out new minor releases on their major version 2 release line as not stable / production ready. As such, HBase expressly advises downstream users to avoid running on top of these releases. Note that additionally the 2.8.1 release was given the same caveat by the Hadoop PMC. For reference, see the release announcements for <a href="https://s.apache.org/hadoop-2.7.0-announcement">Apache Hadoop 2.7.0</a>, <a href="https://s.apache.org/hadoop-2.8.0-announcement">Apache Hadoop 2.8.0</a>, <a href="https://s.apache.org/hadoop-2.8.1-announcement">Apache Hadoop 2.8.1</a>, and <a href="https://s.apache.org/hadoop-2.9.0-announcement">Apache Hadoop 2.9.0</a>.</p>
</div>
</td>
</tr>
@@ -1788,12 +1795,14 @@ data loss. This patch is present in Apache Hadoop releases 2.6.1+.</p>
<td class="content">
<div class="title">Replace the Hadoop Bundled With HBase!</div>
<div class="paragraph">
-<p>Because HBase depends on Hadoop, it bundles an instance of the Hadoop jar under its <em>lib</em> directory.
-The bundled jar is ONLY for use in standalone mode.
+<p>Because HBase depends on Hadoop, it bundles Hadoop jars under its <em>lib</em> directory.
+The bundled jars are ONLY for use in standalone mode.
In distributed mode, it is <em>critical</em> that the version of Hadoop that is out on your cluster match what is under HBase.
-Replace the hadoop jar found in the HBase lib directory with the hadoop jar you are running on your cluster to avoid version mismatch issues.
-Make sure you replace the jar in HBase across your whole cluster.
-Hadoop version mismatch issues have various manifestations but often all look like its hung.</p>
+Replace the hadoop jars found in the HBase lib directory with the equivalent hadoop jars from the version you are running
+on your cluster to avoid version mismatch issues.
+Make sure you replace the jars under HBase across your whole cluster.
+Hadoop version mismatch issues have various manifestations. Check for mismatch if
+HBase appears hung.</p>
</div>
</td>
</tr>
@@ -6779,6 +6788,16 @@ Quitting...</code></pre>
<div class="title">"Distributed Log Replay" feature broken and removed</div>
<p>The Distributed Log Replay feature was broken and has been removed from HBase 2.y+. As a consequence all related configs, metrics, RPC fields, and logging have also been removed. Note that this feature was found to be unreliable in the run up to HBase 1.0, defaulted to being unused, and was effectively removed in HBase 1.2.0 when we started ignoring the config that turns it on (<a href="https://issues.apache.org/jira/browse/HBASE-14465">HBASE-14465</a>). If you are currently using the feature, be sure to perform a clean shutdown, ensure all DLR work is complete, and disable the feature prior to upgrading.</p>
</div>
+<div id="upgrade2.0.prefix-tree.removed" class="paragraph">
+<div class="title"><em>prefix-tree</em> encoding removed</div>
+<p>The prefix-tree encoding was removed from HBase 2.0.0 (<a href="https://issues.apache.org/jira/browse/HBASE-19179">HBASE-19179</a>).
+It was (late!) deprecated in hbase-1.2.7, hbase-1.4.0, and hbase-1.3.2.</p>
+</div>
+<div class="paragraph">
+<p>This feature was removed because it as not being actively maintained. If interested in reviving this
+sweet facility which improved random read latencies at the expensive of slowed writes,
+write the HBase developers list at <em>dev at hbase dot apache dot org</em>.</p>
+</div>
<div id="upgrade2.0.metrics" class="paragraph">
<div class="title">Changed metrics</div>
<p>The following metrics have changed names:</p>
@@ -6826,6 +6845,19 @@ Quitting...</code></pre>
</li>
</ul>
</div>
+<div id="upgrade2.0.logging" class="paragraph">
+<div class="title">Changed logging</div>
+<p>HBase-2.0.0 now uses <a href="https://www.slf4j.org/">slf4j</a> as its logging frontend.
+Prevously, we used <a href="http://logging.apache.org/log4j/1.2/">log4j (1.2)</a>.
+For most the transition should be seamless; slf4j does a good job interpreting
+<em>log4j.properties</em> logging configuration files such that you should not notice
+any difference in your log system emissions.</p>
+</div>
+<div class="paragraph">
+<p>That said, your <em>log4j.properties</em> may need freshening. See <a href="https://issues.apache.org/jira/browse/HBASE-20351">HBASE-20351</a>
+for example, where a stale log configuration file manifest as netty configuration
+being dumped at DEBUG level as preamble on every shell command invocation.</p>
+</div>
<div id="upgrade2.0.zkconfig" class="paragraph">
<div class="title">ZooKeeper configs no longer read from zoo.cfg</div>
<p>HBase no longer optionally reads the 'zoo.cfg' file for ZooKeeper related configuration settings. If you previously relied on the 'hbase.config.read.zookeeper.config' config for this functionality, you should migrate any needed settings to the hbase-site.xml file while adding the prefix 'hbase.zookeeper.property.' to each property name.</p>
@@ -24259,10 +24291,19 @@ Analyze.</p>
</div>
<div class="sect2">
<h3 id="trouble.log.gc"><a class="anchor" href="#trouble.log.gc"></a>125.3. JVM Garbage Collection Logs</h3>
-<div class="listingblock">
-<div class="content">
-<pre>All example Garbage Collection logs in this section are based on Java 8 output. The introduction of Unified Logging in Java 9 and newer will result in very different looking logs.</pre>
+<div class="admonitionblock note">
+<table>
+<tr>
+<td class="icon">
+<i class="fa icon-note" title="Note"></i>
+</td>
+<td class="content">
+<div class="paragraph">
+<p>All example Garbage Collection logs in this section are based on Java 8 output. The introduction of Unified Logging in Java 9 and newer will result in very different looking logs.</p>
</div>
+</td>
+</tr>
+</table>
</div>
<div class="paragraph">
<p>HBase is memory intensive, and using the default GC you can see long pauses in all threads including the <em>Juliet Pause</em> aka "GC of Death". To help debug this or confirm this is happening GC logging can be turned on in the Java virtual machine.</p>
@@ -26187,8 +26228,12 @@ Some commands take arguments. Pass no args or -h for usage.
pe Run PerformanceEvaluation
ltt Run LoadTestTool
canary Run the Canary tool
- regionsplitter Run the RegionSplitter tool
version Print the version
+ backup Backup tables for recovery
+ restore Restore tables from existing backup image
+ regionsplitter Run RegionSplitter tool
+ rowcounter Run RowCounter tool
+ cellcounter Run CellCounter tool
CLASSNAME Run the class named CLASSNAME</pre>
</div>
</div>
@@ -27030,7 +27075,7 @@ Assuming you’re running HDFS with permissions enabled, those permissions w
</div>
</div>
<div class="sect2">
-<h3 id="_walplayer"><a class="anchor" href="#_walplayer"></a>146.14. WALPlayer</h3>
+<h3 id="walplayer"><a class="anchor" href="#walplayer"></a>146.14. WALPlayer</h3>
<div class="paragraph">
<p>WALPlayer is a utility to replay WAL files into HBase.</p>
</div>
@@ -27061,30 +27106,70 @@ The output can optionally be mapped to another set of tables.</p>
<p>WALPlayer, by default, runs as a mapreduce job.
To NOT run WALPlayer as a mapreduce job on your cluster, force it to run all in the local process by adding the flags <code>-Dmapreduce.jobtracker.address=local</code> on the command line.</p>
</div>
+<div class="sect3">
+<h4 id="walplayer.options"><a class="anchor" href="#walplayer.options"></a>146.14.1. WALPlayer Options</h4>
+<div class="paragraph">
+<p>Running <code>WALPlayer</code> with no arguments prints brief usage information:</p>
+</div>
+<div class="listingblock">
+<div class="content">
+<pre>Usage: WALPlayer [options] <wal inputdir> <tables> [<tableMappings>]
+Replay all WAL files into HBase.
+<tables> is a comma separated list of tables.
+If no tables ("") are specified, all tables are imported.
+(Be careful, hbase:meta entries will be imported in this case.)
+
+WAL entries can be mapped to new set of tables via <tableMappings>.
+<tableMappings> is a comma separated list of target tables.
+If specified, each table in <tables> must have a mapping.
+
+By default WALPlayer will load data directly into HBase.
+To generate HFiles for a bulk data load instead, pass the following option:
+ -Dwal.bulk.output=/path/for/output
+ (Only one table can be specified, and no mapping is allowed!)
+Time range options:
+ -Dwal.start.time=[date|ms]
+ -Dwal.end.time=[date|ms]
+ (The start and the end date of timerange. The dates can be expressed
+ in milliseconds since epoch or in yyyy-MM-dd'T'HH:mm:ss.SS format.
+ E.g. 1234567890120 or 2009-02-13T23:32:30.12)
+Other options:
+ -Dmapreduce.job.name=jobName
+ Use the specified mapreduce job name for the wal player
+For performance also consider the following options:
+ -Dmapreduce.map.speculative=false
+ -Dmapreduce.reduce.speculative=false</pre>
+</div>
+</div>
+</div>
</div>
<div class="sect2">
-<h3 id="rowcounter"><a class="anchor" href="#rowcounter"></a>146.15. RowCounter and CellCounter</h3>
+<h3 id="rowcounter"><a class="anchor" href="#rowcounter"></a>146.15. RowCounter</h3>
<div class="paragraph">
-<p><a href="https://hbase.apache.org/apidocs/org/apache/hadoop/hbase/mapreduce/RowCounter.html">RowCounter</a> is a mapreduce job to count all the rows of a table.
+<p><a href="https://hbase.apache.org/apidocs/org/apache/hadoop/hbase/mapreduce/RowCounter.html">RowCounter</a> is a mapreduce job to count all the rows of a table.
This is a good utility to use as a sanity check to ensure that HBase can read all the blocks of a table if there are any concerns of metadata inconsistency.
-It will run the mapreduce all in a single process but it will run faster if you have a MapReduce cluster in place for it to exploit. It is also possible to limit
-the time range of data to be scanned by using the <code>--starttime=[starttime]</code> and <code>--endtime=[endtime]</code> flags.</p>
+It will run the mapreduce all in a single process but it will run faster if you have a MapReduce cluster in place for it to exploit.
+It is possible to limit the time range of data to be scanned by using the <code>--starttime=[starttime]</code> and <code>--endtime=[endtime]</code> flags.
+The scanned data can be limited based on keys using the <code>--range=[startKey],[endKey][;[startKey],[endKey]…​]</code> option.</p>
</div>
<div class="listingblock">
<div class="content">
-<pre>$ bin/hbase org.apache.hadoop.hbase.mapreduce.RowCounter <tablename> [<column1> <column2>...]</pre>
+<pre>$ bin/hbase rowcounter [options] <tablename> [--starttime=<start> --endtime=<end>] [--range=[startKey],[endKey][;[startKey],[endKey]...]] [<column1> <column2>...]</pre>
</div>
</div>
<div class="paragraph">
<p>RowCounter only counts one version per cell.</p>
</div>
<div class="paragraph">
-<p>Note: caching for the input Scan is configured via <code>hbase.client.scanner.caching</code> in the job configuration.</p>
+<p>For performance consider to use <code>-Dhbase.client.scanner.caching=100</code> and <code>-Dmapreduce.map.speculative=false</code> options.</p>
+</div>
</div>
+<div class="sect2">
+<h3 id="cellcounter"><a class="anchor" href="#cellcounter"></a>146.16. CellCounter</h3>
<div class="paragraph">
<p>HBase ships another diagnostic mapreduce job called <a href="https://hbase.apache.org/apidocs/org/apache/hadoop/hbase/mapreduce/CellCounter.html">CellCounter</a>.
Like RowCounter, it gathers more fine-grained statistics about your table.
-The statistics gathered by RowCounter are more fine-grained and include:</p>
+The statistics gathered by CellCounter are more fine-grained and include:</p>
</div>
<div class="ulist">
<ul>
@@ -27111,14 +27196,14 @@ The statistics gathered by RowCounter are more fine-grained and include:</p>
<div class="paragraph">
<p>The program allows you to limit the scope of the run.
Provide a row regex or prefix to limit the rows to analyze.
-Specify a time range to scan the table by using the <code>--starttime=[starttime]</code> and <code>--endtime=[endtime]</code> flags.</p>
+Specify a time range to scan the table by using the <code>--starttime=<starttime></code> and <code>--endtime=<endtime></code> flags.</p>
</div>
<div class="paragraph">
<p>Use <code>hbase.mapreduce.scan.column.family</code> to specify scanning a single column family.</p>
</div>
<div class="listingblock">
<div class="content">
-<pre>$ bin/hbase org.apache.hadoop.hbase.mapreduce.CellCounter <tablename> <outputDir> [regex or prefix]</pre>
+<pre>$ bin/hbase cellcounter <tablename> <outputDir> [reportSeparator] [regex or prefix] [--starttime=<starttime> --endtime=<endtime>]</pre>
</div>
</div>
<div class="paragraph">
@@ -27126,15 +27211,14 @@ Specify a time range to scan the table by using the <code>--starttime=[starttime
</div>
</div>
<div class="sect2">
-<h3 id="_mlockall"><a class="anchor" href="#_mlockall"></a>146.16. mlockall</h3>
+<h3 id="_mlockall"><a class="anchor" href="#_mlockall"></a>146.17. mlockall</h3>
<div class="paragraph">
<p>It is possible to optionally pin your servers in physical memory making them less likely to be swapped out in oversubscribed environments by having the servers call <a href="http://linux.die.net/man/2/mlockall">mlockall</a> on startup.
-See <a href="https://issues.apache.org/jira/browse/HBASE-4391">HBASE-4391 Add ability to
- start RS as root and call mlockall</a> for how to build the optional library and have it run on startup.</p>
+See <a href="https://issues.apache.org/jira/browse/HBASE-4391">HBASE-4391 Add ability to start RS as root and call mlockall</a> for how to build the optional library and have it run on startup.</p>
</div>
</div>
<div class="sect2">
-<h3 id="compaction.tool"><a class="anchor" href="#compaction.tool"></a>146.17. Offline Compaction Tool</h3>
+<h3 id="compaction.tool"><a class="anchor" href="#compaction.tool"></a>146.18. Offline Compaction Tool</h3>
<div class="paragraph">
<p>See the usage for the
<a href="https://hbase.apache.org/devapidocs/org/apache/hadoop/hbase/regionserver/CompactionTool.html">CompactionTool</a>.
@@ -27147,7 +27231,7 @@ Run it like:</p>
</div>
</div>
<div class="sect2">
-<h3 id="__code_hbase_clean_code"><a class="anchor" href="#__code_hbase_clean_code"></a>146.18. <code>hbase clean</code></h3>
+<h3 id="__code_hbase_clean_code"><a class="anchor" href="#__code_hbase_clean_code"></a>146.19. <code>hbase clean</code></h3>
<div class="paragraph">
<p>The <code>hbase clean</code> command cleans HBase data from ZooKeeper, HDFS, or both.
It is appropriate to use for testing.
@@ -27166,7 +27250,7 @@ Options:
</div>
</div>
<div class="sect2">
-<h3 id="__code_hbase_pe_code"><a class="anchor" href="#__code_hbase_pe_code"></a>146.19. <code>hbase pe</code></h3>
+<h3 id="__code_hbase_pe_code"><a class="anchor" href="#__code_hbase_pe_code"></a>146.20. <code>hbase pe</code></h3>
<div class="paragraph">
<p>The <code>hbase pe</code> command runs the PerformanceEvaluation tool, which is used for testing.</p>
</div>
@@ -27179,7 +27263,7 @@ For usage instructions, run the command with no options.</p>
</div>
</div>
<div class="sect2">
-<h3 id="__code_hbase_ltt_code"><a class="anchor" href="#__code_hbase_ltt_code"></a>146.20. <code>hbase ltt</code></h3>
+<h3 id="__code_hbase_ltt_code"><a class="anchor" href="#__code_hbase_ltt_code"></a>146.21. <code>hbase ltt</code></h3>
<div class="paragraph">
<p>The <code>hbase ltt</code> command runs the LoadTestTool utility, which is used for testing.</p>
</div>
@@ -31958,9 +32042,8 @@ policy, which is configured with all the available actions. It chose to run <cod
<div class="sect3">
<h4 id="chaos.monkey.properties"><a class="anchor" href="#chaos.monkey.properties"></a>168.5.5. Configuring Individual ChaosMonkey Actions</h4>
<div class="paragraph">
-<p>Since HBase version 1.0.0 (<a href="https://issues.apache.org/jira/browse/HBASE-11348">HBASE-11348</a>),
-ChaosMonkey integration tests can be configured per test run.
-Create a Java properties file in the HBase classpath and pass it to ChaosMonkey using
+<p>ChaosMonkey integration tests can be configured per test run.
+Create a Java properties file in the HBase CLASSPATH and pass it to ChaosMonkey using
the <code>-monkeyProps</code> configuration flag. Configurable properties, along with their default
values if applicable, are listed in the <code>org.apache.hadoop.hbase.chaos.factories.MonkeyConstants</code>
class. For properties that have defaults, you can override them by including them
@@ -31975,8 +32058,11 @@ in your properties file.</p>
</div>
</div>
<div class="paragraph">
-<p>The above command will start the integration tests and chaos monkey passing the properties file <em>monkey.properties</em>.
-Here is an example chaos monkey file:</p>
+<p>The above command will start the integration tests and chaos monkey. It will look for the
+properties file <em>monkey.properties</em> on the HBase CLASSPATH; e.g. inside the HBASE <em>conf</em> dir.</p>
+</div>
+<div class="paragraph">
+<p>Here is an example chaos monkey file:</p>
</div>
<div id="monkey.properties" class="listingblock">
<div class="title">Example ChaosMonkey Properties File</div>
@@ -31990,6 +32076,9 @@ batch.restart.rs.ratio=<span class="float">0.4f</span></code></pre>
</div>
</div>
<div class="paragraph">
+<p>Periods/time are expressed in milliseconds.</p>
+</div>
+<div class="paragraph">
<p>HBase 1.0.2 and newer adds the ability to restart HBase’s underlying ZooKeeper quorum or
HDFS nodes. To use these actions, you need to configure some new properties, which
have no reasonable defaults because they are deployment-specific, in your ChaosMonkey
@@ -37679,7 +37768,7 @@ The server will return cellblocks compressed using this same compressor as long
<div id="footer">
<div id="footer-text">
Version 3.0.0-SNAPSHOT<br>
-Last updated 2018-04-11 14:29:48 UTC
+Last updated 2018-04-12 14:30:08 UTC
</div>
</div>
</body>
http://git-wip-us.apache.org/repos/asf/hbase-site/blob/d220bc5e/bulk-loads.html
----------------------------------------------------------------------
diff --git a/bulk-loads.html b/bulk-loads.html
index 192ae3b..8aa75d4 100644
--- a/bulk-loads.html
+++ b/bulk-loads.html
@@ -7,7 +7,7 @@
<head>
<meta charset="UTF-8" />
<meta name="viewport" content="width=device-width, initial-scale=1.0" />
- <meta name="Date-Revision-yyyymmdd" content="20180411" />
+ <meta name="Date-Revision-yyyymmdd" content="20180412" />
<meta http-equiv="Content-Language" content="en" />
<title>Apache HBase –
Bulk Loads in Apache HBase (TM)
@@ -306,7 +306,7 @@ under the License. -->
<a href="https://www.apache.org/">The Apache Software Foundation</a>.
All rights reserved.
- <li id="publishDate" class="pull-right">Last Published: 2018-04-11</li>
+ <li id="publishDate" class="pull-right">Last Published: 2018-04-12</li>
</p>
</div>