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From "Sunil G (JIRA)" <j...@apache.org>
Subject [jira] [Commented] (YARN-7728) Expose and expand container preemptions in Capacity Scheduler queue metrics
Date Fri, 12 Jan 2018 11:23:00 GMT

    [ https://issues.apache.org/jira/browse/YARN-7728?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=16323837#comment-16323837

Sunil G commented on YARN-7728:

Thanks [~eepayne], this will be really helpful when preemption happens.

I have doubt w.r.t multiple resources scenario. In 3.0, we support multiple types, and this
covers only cpu and memory. So could we cover preemption metrics also in case of multi resources.
One more doubt is with aggregateVcoreSecondsPreempted. MutableCounterLong is used for this.
But under one queue, we ll have multiple containers gets preempted and each container resource
size vary drastically. So are we looking for an aggregate resource among all preempted containers
in a given time ?

Minor Nits:
aggregateMegabyteSecondsPreempted: MegaByte seems a bit confusing, MemoryMB is used in another
places as well. Could we use something similar (like prepending memory)

> Expose and expand container preemptions in Capacity Scheduler queue metrics
> ---------------------------------------------------------------------------
>                 Key: YARN-7728
>                 URL: https://issues.apache.org/jira/browse/YARN-7728
>             Project: Hadoop YARN
>          Issue Type: Improvement
>    Affects Versions: 2.9.0, 2.8.3, 3.0.0
>            Reporter: Eric Payne
>            Assignee: Eric Payne
>         Attachments: YARN-7728.001.patch
> YARN-1047 exposed queue metrics for the number of preempted containers to the fair scheduler.
I would like to also expose these to the capacity scheduler and add metrics for the amount
of lost memory seconds and vcore seconds.

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