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Added more on rolling restart 

git-svn-id: https://svn.apache.org/repos/asf/hbase/trunk@1091534 13f79535-47bb-0310-9956-ffa450edef68
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Michael Stack 2011-04-12 18:33:19 +00:00
parent afa5418210
commit cf07e331ac
1 changed files with 45 additions and 2 deletions
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47
src/docbkx/book.xml
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@ -1142,6 +1142,8 @@ false
</para>
</note>
</para>
<section xml:id="rolling">
<title>Rolling Restart</title>
<para>
You can also ask this script to restart a RegionServer after the shutdown
AND move its old regions back into place. The latter you might do to
@ -1150,10 +1152,51 @@ false
<programlisting>$ for i in `cat conf/regionservers|sort`; do ./bin/graceful_stop.sh --restart --reload --debug $i; done &amp;> /tmp/log.txt &amp;
</programlisting>
Tail the output of <filename>/tmp/log.txt</filename> to follow the scripts
progress. The above does regionservers only. You'd need to do the master
update separately.
progress. The above does regionservers only. Be sure to disable the
load balancer before doing the above. You'd need to do the master
update separately. Do it before you run the above script.
Here is a pseudo-script for how you might craft a rolling restart script:
<orderedlist>
<listitem><para>Untar your release, make sure of its configuration and
then rsync it across the cluster. If this is 0.90.2, patch it
with HBASE-3744 and HBASE-3756.
</para>
</listitem>
<listitem>
<para>Run hbck to ensure the cluster consistent
<programlisting>$ ./bin/hbase hbck</programlisting>
Effect repairs if inconsistent.
</para>
</listitem>
<listitem>
<para>Restart the Master: <programlisting>$ ./bin/hbase-daemon.sh stop master; ./bin/hbase-daemon.sh start master</programlisting>
</para>
</listitem>
<listitem>
<para>
Disable the region balancer:<programlisting>$ echo "balance_switch false" | ./bin/hbase</programlisting>
</para>
</listitem>
<listitem>
<para>Run the <filename>graceful_stop.sh</filename> script per regionserver. For example:
<programlisting>$ for i in `cat conf/regionservers|sort`; do ./bin/graceful_stop.sh --restart --reload --debug $i; done &amp;> /tmp/log.txt &amp;
</programlisting>
If you are running thrift or rest servers on the regionserver, pass --thrift or --rest options (See usage
for <filename>graceful_stop.sh</filename> script).
</para>
</listitem>
<listitem>
<para>Restart the Master again. This will clear out dead servers list and reenable the balancer.
</para>
</listitem>
<listitem>
<para>Run hbck to ensure the cluster is consistent.
</para>
</listitem>
</orderedlist>
</para>
</section>
</section>
</appendix>
<appendix xml:id="compression">