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From "Jian He (JIRA)" <j...@apache.org>
Subject [jira] [Commented] (YARN-415) Capture memory utilization at the app-level for chargeback
Date Mon, 18 Aug 2014 03:50:21 GMT

    [ https://issues.apache.org/jira/browse/YARN-415?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=14100253#comment-14100253
] 

Jian He commented on YARN-415:
------------------------------

bq.  an attempt can be in the complete state before all of its containers are finished
CapacityScheduler#doneApplicationAttempt(FairScheduler#removeApplicationAttempt) are synchronously
finishing all the live containers. so I think all containers should be guaranteed to finish
before attempt finishes.
bq. charging the running containers to the current app until the containers finish will be
seemless to the end user.
Particularly in work-preserving AM restart, current AM is actually the one who's managing
previous running containers. Running containers in scheduler are already transferred to the
current AM. So running containers metrics are transferred as well. I think it'll be confusing
if finished containers are still charged back against the previous dead attempt. Btw, YARN-1809
will add the attempt web page where we could show attempt-specific metrics also. 

Regarding the problem of metrics persistency. Agree that it doesn't solve the problem for
running apps in general. Maybe we can have the state store changes in a separate jira and
discuss more there, so that we can get this in first. 

> 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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