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Posted to mapreduce-issues@hadoop.apache.org by "Harsh J (JIRA)" <ji...@apache.org> on 2012/06/05 18:50:24 UTC
[jira] [Commented] (MAPREDUCE-4316) Improve default config values
for YARN
[ https://issues.apache.org/jira/browse/MAPREDUCE-4316?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=13289528#comment-13289528 ]
Harsh J commented on MAPREDUCE-4316:
------------------------------------
I'd lowered the min-alloc via MAPREDUCE-3812. But had left the MR defaults for job allocs the same as they were. How does that min-alloc value lower the performance though Arun?
What ought one raise - request size or rely on min-alloc? I was under the impression that min-allocs should be low to grant lower requests per container, but large requests (from MR App) should anyway do fine as they did before. Which one ought users rely on?
> Improve default config values for YARN
> --------------------------------------
>
> Key: MAPREDUCE-4316
> URL: https://issues.apache.org/jira/browse/MAPREDUCE-4316
> Project: Hadoop Map/Reduce
> Issue Type: Improvement
> Affects Versions: 2.0.0-alpha
> Reporter: Arun C Murthy
>
> Currently some of our configs are way off e.g. min-alloc is 128M while max-alloc is 10240.
> This leads to poor out-of-box performance as noticed by some users: http://s.apache.org/avd
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