[ https://issues.apache.org/jira/browse/MAPREDUCE-3813?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=13201694#comment-13201694 ]
Hudson commented on MAPREDUCE-3813: ----------------------------------- Integrated in Hadoop-Common-trunk-Commit #1672 (See [https://builds.apache.org/job/Hadoop-Common-trunk-Commit/1672/]) MAPREDUCE-3813. Added a cache for resolved racks. Contributed by Vinod K V. acmurthy : http://svn.apache.org/viewcvs.cgi/?root=Apache-SVN&view=rev&rev=1241209 Files : * /hadoop/common/trunk/hadoop-mapreduce-project/CHANGES.txt * /hadoop/common/trunk/hadoop-mapreduce-project/hadoop-yarn/hadoop-yarn-common/src/main/java/org/apache/hadoop/yarn/util/RackResolver.java * /hadoop/common/trunk/hadoop-mapreduce-project/hadoop-yarn/hadoop-yarn-common/src/test/java/org/apache/hadoop/yarn/util/TestRackResolver.java > RackResolver should maintain a cache to avoid repetitive lookups. > ----------------------------------------------------------------- > > Key: MAPREDUCE-3813 > URL: https://issues.apache.org/jira/browse/MAPREDUCE-3813 > Project: Hadoop Map/Reduce > Issue Type: Sub-task > Components: mrv2, performance > Affects Versions: 0.23.0 > Reporter: Vinod Kumar Vavilapalli > Assignee: Vinod Kumar Vavilapalli > Fix For: 0.23.1 > > Attachments: MAPREDUCE-3813-20120205.txt > > > With the current code, during task creation, we repeatedly resolve hosts and > RackResolver doesn't cache any of the results. Caching will improve > performance. -- This message is automatically generated by JIRA. If you think it was sent incorrectly, please contact your JIRA administrators: https://issues.apache.org/jira/secure/ContactAdministrators!default.jspa For more information on JIRA, see: http://www.atlassian.com/software/jira