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Posted to yarn-issues@hadoop.apache.org by "Arun Suresh (JIRA)" <ji...@apache.org> on 2016/05/03 19:03:12 UTC
[jira] [Commented] (YARN-5035) FairScheduler: Adjust maxAssign
dynamically when assignMultiple is turned on
[ https://issues.apache.org/jira/browse/YARN-5035?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=15269086#comment-15269086 ]
Arun Suresh commented on YARN-5035:
-----------------------------------
[~kasha], You think it is possible to generalize this further ?
I was thinking of integrating YARN-4056 with the fair scheduler. My initial thought process was to replace the assignMultiple with the Bundler.. which would be able to fit an optimal number of containers on a node (optimal, because the containers selected will have complementary resource requirements and thus will have better packing)
This way, you don't really have to worry about an upper limit..
Thoughts ?
> FairScheduler: Adjust maxAssign dynamically when assignMultiple is turned on
> ----------------------------------------------------------------------------
>
> Key: YARN-5035
> URL: https://issues.apache.org/jira/browse/YARN-5035
> Project: Hadoop YARN
> Issue Type: Improvement
> Components: fairscheduler
> Affects Versions: 2.8.0
> Reporter: Karthik Kambatla
> Assignee: Karthik Kambatla
>
> When assignMultiple is turned on, today the number of containers allocated to node within a single heartbeat is determined by maxAssign. Picking a higher value for this prevents the spreading of the workload, and a smaller number leads to slow ramp up.
> The proposal is to make it dynamic - half of the unallocated resources on the node.
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