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From "Siddharth Seth (JIRA)" <j...@apache.org>
Subject [jira] [Commented] (YARN-1067) AMRMClient heartbeat interval should not be static
Date Thu, 29 Aug 2013 00:31:52 GMT

    [ https://issues.apache.org/jira/browse/YARN-1067?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=13753093#comment-13753093
] 

Siddharth Seth commented on YARN-1067:
--------------------------------------

I think it'll be useful to have a minimum - i.e. wait for at least this minimum time before
sending another heartbeat, irrespective of whether a resource request is pending or not. Gives
the RM time to actually allocate some containers, for the AM to attempt an allocation of these
containers, and is possibly better for the consistency of tables maintained by the AM and
RM.

Also the heartbeat interval could be scaled back - higher than the minimum if there's no allocations.

Could some of the sleeps be replaced with wait/notify ?
                
> AMRMClient heartbeat interval should not be static
> --------------------------------------------------
>
>                 Key: YARN-1067
>                 URL: https://issues.apache.org/jira/browse/YARN-1067
>             Project: Hadoop YARN
>          Issue Type: Improvement
>    Affects Versions: 2.0.5-alpha
>            Reporter: Siddharth Seth
>         Attachments: YARN-1067.patch
>
>
> The heartbeat interval can be modified dynamically - more often when there are pending
requests, and toned down when the heartbeat is solving no purpose other than a ping.
> There's a couple of jiras which are trying to change the scheduling loop - at which point
this becomes useful.

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