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Hadoop QA commented on HADOOP-1965: ----------------------------------- +1 overall. Here are the results of testing the latest attachment http://issues.apache.org/jira/secure/attachment/12372632/HADOOP-2419.patch against trunk revision r611264. @author +1. The patch does not contain any @author tags. javadoc +1. The javadoc tool did not generate any warning messages. javac +1. The applied patch does not generate any new compiler warnings. findbugs +1. The patch does not introduce any new Findbugs warnings. core tests +1. The patch passed core unit tests. contrib tests +1. The patch passed contrib unit tests. Test results: http://lucene.zones.apache.org:8080/hudson/job/Hadoop-Patch/1545/testReport/ Findbugs warnings: http://lucene.zones.apache.org:8080/hudson/job/Hadoop-Patch/1545/artifact/trunk/build/test/findbugs/newPatchFindbugsWarnings.html Checkstyle results: http://lucene.zones.apache.org:8080/hudson/job/Hadoop-Patch/1545/artifact/trunk/build/test/checkstyle-errors.html Console output: http://lucene.zones.apache.org:8080/hudson/job/Hadoop-Patch/1545/console This message is automatically generated. > Handle map output buffers better > -------------------------------- > > Key: HADOOP-1965 > URL: https://issues.apache.org/jira/browse/HADOOP-1965 > Project: Hadoop > Issue Type: Improvement > Components: mapred > Affects Versions: 0.16.0 > Reporter: Devaraj Das > Assignee: Amar Kamat > Fix For: 0.16.0 > > Attachments: 1965_single_proc_150mb_gziped.jpeg, > 1965_single_proc_150mb_gziped.pdf, 1965_single_proc_150mb_gziped_breakup.png, > HADOOP-1965-1.patch, HADOOP-1965-Benchmark.patch, > HADOOP-1965-Benchmark.patch, HADOOP-1965-Benchmark.patch, > HADOOP-1965-Benchmark.patch, HADOOP-1965-Benchmark.patch, HADOOP-2419.patch, > HADOOP-2419.patch, HADOOP-2419.patch, HADOOP-2419.patch > > > Today, the map task stops calling the map method while sort/spill is using > the (single instance of) map output buffer. One improvement that can be done > to improve performance of the map task is to have another buffer for writing > the map outputs to, while sort/spill is using the first buffer. -- This message is automatically generated by JIRA. - You can reply to this email to add a comment to the issue online.