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From "Ray Chiang (JIRA)" <j...@apache.org>
Subject [jira] [Commented] (YARN-2868) Add metric for initial container launch time to FairScheduler
Date Mon, 02 Feb 2015 19:38:35 GMT

    [ https://issues.apache.org/jira/browse/YARN-2868?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=14301758#comment-14301758
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Ray Chiang commented on YARN-2868:
----------------------------------

My current thoughts:

D1) Metrics are bound to be overlapping.  If we measure items that have potentially long or
highly-variable runtimes (e.g. state transitions), then some of them are going to need finer
grained measurements.

D2) I'd like to get in this JIRA and follow up with some other container measurements in the
same parts of the code.

D3) YARN-3105 will be the next thing I work on after the parts in D2)

D4) Your suggestion is a broader measurement in that it captures more of the user-perceieved
delay for first container allocation.  I think both are valid measurements, but serve different
purposes.  I'd like to have both, but that could be a new JIRA (or maybe part of YARN-3105,
depending on how it's finally scoped).


> Add metric for initial container launch time to FairScheduler
> -------------------------------------------------------------
>
>                 Key: YARN-2868
>                 URL: https://issues.apache.org/jira/browse/YARN-2868
>             Project: Hadoop YARN
>          Issue Type: Improvement
>            Reporter: Ray Chiang
>            Assignee: Anubhav Dhoot
>              Labels: metrics, supportability
>         Attachments: YARN-2868-01.patch, YARN-2868.002.patch, YARN-2868.003.patch, YARN-2868.004.patch,
YARN-2868.005.patch, YARN-2868.006.patch, YARN-2868.007.patch
>
>
> Add a metric to measure the latency between "starting container allocation" and "first
container actually allocated".



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