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svn merge -c 1209246 from trunk for HADOOP-7877. 

git-svn-id: https://svn.apache.org/repos/asf/hadoop/common/branches/branch-0.23@1209248 13f79535-47bb-0310-9956-ffa450edef68
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Tsz-wo Sze 2011-12-01 21:21:47 +00:00
parent 8031aef007
commit 162413d138
2 changed files with 14 additions and 3 deletions
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3
hadoop-common-project/hadoop-common/CHANGES.txt
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@ -27,6 +27,9 @@ Release 0.23.1 - Unreleased
HADOOP-7804. Enable hadoop config generator to set configurations to enable
short circuit read. (Arpit Gupta via jitendra)
HADOOP-7877. Update balancer CLI usage documentation to include the new
-policy option. (szetszwo)
OPTIMIZATIONS
BUG FIXES

14
hadoop-common-project/hadoop-common/src/main/docs/src/documentation/content/xdocs/commands_manual.xml
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@ -445,14 +445,22 @@
<a href="http://hadoop.apache.org/hdfs/docs/current/hdfs_user_guide.html#Rebalancer">Rebalancer</a>.
</p>
<p>
<code>Usage: hadoop balancer [-threshold &lt;threshold&gt;]</code>
<code>Usage: hadoop balancer [-policy &lt;blockpool|datanode&gt;] [-threshold &lt;threshold&gt;]</code>
</p>
<table>
<tr><th> COMMAND_OPTION </th><th> Description </th></tr>
<tr>
<td><code>-policy &lt;blockpool|datanode&gt;</code></td>
<td>The balancing policy.
<br /><code>datanode</code>: Cluster is balance if the disk usage of each datanode is balance.
<br /><code>blockpool</code>: Cluster is balance if the disk usage of each block pool in each datanode is balance.
<br />Note that <code>blockpool</code> is a condition stronger than <code>datanode</code>.
The default policy is <code>datanode</code>.
</td>
</tr>
<tr>
<td><code>-threshold &lt;threshold&gt;</code></td>
<td>Percentage of disk capacity. This overwrites the default threshold.</td>
<td>Percentage of disk capacity. This default threshold is 10%.</td>
</tr>
</table>
</section>