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Hadoop QA commented on HDFS-1110: --------------------------------- -1 overall. Here are the results of testing the latest attachment http://issues.apache.org/jira/secure/attachment/12446370/hdfs-1110.4.patch against trunk revision 951555. +1 @author. The patch does not contain any @author tags. +1 tests included. The patch appears to include 3 new or modified tests. +1 javadoc. The javadoc tool did not generate any warning messages. +1 javac. The applied patch does not increase the total number of javac compiler warnings. +1 findbugs. The patch does not introduce any new Findbugs warnings. +1 release audit. The applied patch does not increase the total number of release audit warnings. -1 core tests. The patch failed core unit tests. -1 contrib tests. The patch failed contrib unit tests. Test results: http://hudson.zones.apache.org/hudson/job/Hdfs-Patch-h5.grid.sp2.yahoo.net/397/testReport/ Findbugs warnings: http://hudson.zones.apache.org/hudson/job/Hdfs-Patch-h5.grid.sp2.yahoo.net/397/artifact/trunk/build/test/findbugs/newPatchFindbugsWarnings.html Checkstyle results: http://hudson.zones.apache.org/hudson/job/Hdfs-Patch-h5.grid.sp2.yahoo.net/397/artifact/trunk/build/test/checkstyle-errors.html Console output: http://hudson.zones.apache.org/hudson/job/Hdfs-Patch-h5.grid.sp2.yahoo.net/397/console This message is automatically generated. > Namenode heap optimization - reuse objects for commonly used file names > ----------------------------------------------------------------------- > > Key: HDFS-1110 > URL: https://issues.apache.org/jira/browse/HDFS-1110 > Project: Hadoop HDFS > Issue Type: Improvement > Reporter: Suresh Srinivas > Assignee: Suresh Srinivas > Fix For: 0.22.0 > > Attachments: hdfs-1110.2.patch, hdfs-1110.3.patch, hdfs-1110.4.patch, > hdfs-1110.patch > > > There are a lot of common file names used in HDFS, mainly created by > mapreduce, such as file names starting with "part". Reusing byte[] > corresponding to these recurring file names will save significant heap space > used for storing the file names in millions of INodeFile objects. -- This message is automatically generated by JIRA. - You can reply to this email to add a comment to the issue online.