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From "Karthik Kambatla (JIRA)" <j...@apache.org>
Subject [jira] [Commented] (YARN-415) Capture memory utilization at the app-level for chargeback
Date Sat, 16 Aug 2014 02:48:20 GMT

    [ https://issues.apache.org/jira/browse/YARN-415?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=14099467#comment-14099467
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Karthik Kambatla commented on YARN-415:
---------------------------------------

bq. In fact, the store operation only happens when the app finishes
We will be sending more data to the store, no? Just sending these two values isn't a big deal,
but when we send 15 such values for every application it could be.

Also, what happens if the RM goes down while the app is running? If we store only on app finish,
would we lose the numbers from previous app-attempts in case of non-work-preserving restart.
In case of work-preserving restart, would we miss out on partial data? 

> Capture memory utilization at the app-level for chargeback
> ----------------------------------------------------------
>
>                 Key: YARN-415
>                 URL: https://issues.apache.org/jira/browse/YARN-415
>             Project: Hadoop YARN
>          Issue Type: New Feature
>          Components: resourcemanager
>    Affects Versions: 0.23.6
>            Reporter: Kendall Thrapp
>            Assignee: Andrey Klochkov
>         Attachments: YARN-415--n10.patch, YARN-415--n2.patch, YARN-415--n3.patch, YARN-415--n4.patch,
YARN-415--n5.patch, YARN-415--n6.patch, YARN-415--n7.patch, YARN-415--n8.patch, YARN-415--n9.patch,
YARN-415.201405311749.txt, YARN-415.201406031616.txt, YARN-415.201406262136.txt, YARN-415.201407042037.txt,
YARN-415.201407071542.txt, YARN-415.201407171553.txt, YARN-415.201407172144.txt, YARN-415.201407232237.txt,
YARN-415.201407242148.txt, YARN-415.201407281816.txt, YARN-415.201408062232.txt, YARN-415.201408080204.txt,
YARN-415.201408092006.txt, YARN-415.201408132109.txt, YARN-415.201408150030.txt, YARN-415.patch
>
>
> For the purpose of chargeback, I'd like to be able to compute the cost of an
> application in terms of cluster resource usage.  To start out, I'd like to get the memory
utilization of an application.  The unit should be MB-seconds or something similar and, from
a chargeback perspective, the memory amount should be the memory reserved for the application,
as even if the app didn't use all that memory, no one else was able to use it.
> (reserved ram for container 1 * lifetime of container 1) + (reserved ram for
> container 2 * lifetime of container 2) + ... + (reserved ram for container n * lifetime
of container n)
> It'd be nice to have this at the app level instead of the job level because:
> 1. We'd still be able to get memory usage for jobs that crashed (and wouldn't appear
on the job history server).
> 2. We'd be able to get memory usage for future non-MR jobs (e.g. Storm).
> This new metric should be available both through the RM UI and RM Web Services REST API.



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