[ https://issues.apache.org/jira/browse/MAPREDUCE-3008?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel ]
Allen Wittenauer updated MAPREDUCE-3008: ---------------------------------------- Fix Version/s: (was: 2.1.0-beta) (was: 3.0.0) > [Gridmix] Improve cumulative CPU usage emulation for short running tasks > ------------------------------------------------------------------------ > > Key: MAPREDUCE-3008 > URL: https://issues.apache.org/jira/browse/MAPREDUCE-3008 > Project: Hadoop Map/Reduce > Issue Type: Sub-task > Components: contrib/gridmix > Affects Versions: 0.24.0 > Reporter: Amar Kamat > Assignee: Amar Kamat > Labels: cpu-emulation, gridmix > Fix For: 1.1.0 > > Attachments: mapreduce-2591-v1.4.2.patch, > mapreduce-2591-v1.7-0.20-security.patch, mapreduce-2591-v1.7.patch > > > CPU emulation in Gridmix fails to meet the expected target if the map has no > data to sort/spill/merge. There are 2 major reasons for this: > 1. The map task end immediately ends soon after the map task. The map > progress is 67% while the map phase ends. > 2. Currently, the sort (comparator) doesnt emulate CPU. If the map is short > lived, the CPU emulation thread (spawned from the map task in cleanup) > doesn't get a chance to emulate. -- This message was sent by Atlassian JIRA (v6.3.4#6332)