[jira] [Commented] (YARN-6426) Compress ZK YARN keys to scale up (especially AppStateData

["Hadoop QA (JIRA)" <ji...@apache.org>]

    [ https://issues.apache.org/jira/browse/YARN-6426?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=16690342#comment-16690342 ] 

Hadoop QA commented on YARN-6426:
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| (x) *{color:red}-1 overall{color}* |
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|| Vote || Subsystem || Runtime || Comment ||
| {color:blue}0{color} | {color:blue} reexec {color} | {color:blue}  0m  0s{color} | {color:blue} Docker mode activated. {color} |
| {color:red}-1{color} | {color:red} patch {color} | {color:red}  0m  5s{color} | {color:red} YARN-6426 does not apply to trunk. Rebase required? Wrong Branch? See https://wiki.apache.org/hadoop/HowToContribute for help. {color} |
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|| Subsystem || Report/Notes ||
| JIRA Issue | YARN-6426 |
| JIRA Patch URL | https://issues.apache.org/jira/secure/attachment/12861550/zkcompression.patch |
| Console output | https://builds.apache.org/job/PreCommit-YARN-Build/22593/console |
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> Compress ZK YARN keys to scale up (especially AppStateData
> ----------------------------------------------------------
>
>                 Key: YARN-6426
>                 URL: https://issues.apache.org/jira/browse/YARN-6426
>             Project: Hadoop YARN
>          Issue Type: Improvement
>          Components: yarn
>    Affects Versions: 3.0.0-alpha2
>            Reporter: Roni Burd
>            Assignee: Roni Burd
>            Priority: Major
>              Labels: patch
>         Attachments: zkcompression.patch
>
>
> ZK today stores the protobuf files uncompressed. This is not an issue except that if a customer job has thousands of files, AppStateData will store the user context as a string with multiple URLs and it is easy to get to 1MB or more. 
> This can put unnecessary strain on ZK and make the process slow. 
> The proposal is to simply compress protobufs before sending them to ZK



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