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Posted to commits@hbase.apache.org by st...@apache.org on 2012/09/19 22:13:10 UTC

svn commit: r1387734 - /hbase/trunk/src/docbkx/performance.xml

Author: stack
Date: Wed Sep 19 20:13:09 2012
New Revision: 1387734

URL: http://svn.apache.org/viewvc?rev=1387734&view=rev
Log:
HBASE-6798 HDFS always read checksum form meta file; DOCUMENTATION

Modified:
    hbase/trunk/src/docbkx/performance.xml

Modified: hbase/trunk/src/docbkx/performance.xml
URL: http://svn.apache.org/viewvc/hbase/trunk/src/docbkx/performance.xml?rev=1387734&r1=1387733&r2=1387734&view=diff
==============================================================================
--- hbase/trunk/src/docbkx/performance.xml (original)
+++ hbase/trunk/src/docbkx/performance.xml Wed Sep 19 20:13:09 2012
@@ -192,6 +192,13 @@
         If there is enough RAM, increasing this can help.  
         </para>
     </section>
+    <section xml:id="hbase.regionserver.checksum.verify">
+        <title><varname>hbase.regionserver.checksum.verify</varname></title>
+        <para>Have HBase write the checksum into the datablock and save
+        having to do the checksum seek whenever you read. See the
+        release note on <link xlink:href="https://issues.apache.org/jira/browse/HBASE-5074">HBASE-5074 support checksums in HBase block cache</link>.  
+        </para>
+    </section>
 
   </section>
   <section xml:id="perf.hdfs.configs">