[ https://issues.apache.org/jira/browse/MAPREDUCE-2340?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel ]
Allen Wittenauer updated MAPREDUCE-2340: ---------------------------------------- Labels: BB2015-05-TBR critical-0.22.0 (was: critical-0.22.0) > optimize JobInProgress.initTasks() > ---------------------------------- > > Key: MAPREDUCE-2340 > URL: https://issues.apache.org/jira/browse/MAPREDUCE-2340 > Project: Hadoop Map/Reduce > Issue Type: Improvement > Components: jobtracker > Affects Versions: 0.20.1, 0.21.0 > Reporter: Kang Xiao > Labels: BB2015-05-TBR, critical-0.22.0 > Attachments: MAPREDUCE-2340.patch, MAPREDUCE-2340.patch, > MAPREDUCE-2340.r1.diff > > > JobTracker's hostnameToNodeMap cache can speed up JobInProgress.initTasks() > and JobInProgress.createCache() significantly. A test for 1 job with 100000 > maps on a 2400 cluster shows nearly 10 and 50 times speed up for initTasks() > and createCache(). -- This message was sent by Atlassian JIRA (v6.3.4#6332)