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From Daniel Gómez Ferro (JIRA) <j...@apache.org>
Subject [jira] [Commented] (S4-25) Write S4 Application Master to deploy S4 in Yarn
Date Fri, 23 Nov 2012 10:33:02 GMT

    [ https://issues.apache.org/jira/browse/S4-25?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=13503147#comment-13503147
] 

Daniel Gómez Ferro commented on S4-25:
--------------------------------------

Thanks for the update.

I think I wasn't clear enough on my previous comment. My idea was to decouple the "Container
Memory" from the "Node/JVM Memory", since the JVM memory we set through -Xmx has to be strictly
less than the reserved memory at the container level, otherwise we could run into the issues
reported by Frank Zheng on the mailing list (see http://mail-archives.apache.org/mod_mbox/incubator-s4-user/201211.mbox/%3CCAAf2GfeQK_-zx7sCvpP_9euTsDJL0VbDTS08iXMyQw1%3D8%2B1tOg%40mail.gmail.com%3E
) What I propose is to have two separate parameters, one for the container memory and another
for the jvm memory.

Do you think that's too much complexity?

There's a minor issue in the S4ApplicationMaster, it's not taking into account the -s4NodeMemory
parameter to compute the container memory (it always picks YARN's minimum container memory
regardless of the passed parameters).
                
> Write S4 Application Master to deploy S4 in Yarn
> ------------------------------------------------
>
>                 Key: S4-25
>                 URL: https://issues.apache.org/jira/browse/S4-25
>             Project: Apache S4
>          Issue Type: New Feature
>            Reporter: J Mohamed Zahoor
>             Fix For: 0.6
>
>         Attachments: S4-ApplicationMaster.diff, S4-Client.diff, S4-Constants.diff, S4-YARN-1.patch
>
>
> On the lines of s4PigWrapper, write a s4 application master to host s4 piper inside Hadoop
Yarn. This could be useful not only for reading data stored in hadoop ( to build or train
a model)... But we could make use of the resource manager to deploy s4 instances in remote
machine and monitor them. In short, we could make use of most of the resource management ,
scheduling and other good stuff in Yarn.
> - Yarn is useful to deploy and launch s4 instances.
> - It still requires deploying node managers on each box which means it will
> be useful if one is running more than one s4 process on a node.

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