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Posted to issues@kylin.apache.org by "Dayue Gao (JIRA)" <ji...@apache.org> on 2016/12/29 10:40:58 UTC
[jira] [Resolved] (KYLIN-2328) Reduce the size of metadata uploaded
to distributed cache
[ https://issues.apache.org/jira/browse/KYLIN-2328?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel ]
Dayue Gao resolved KYLIN-2328.
------------------------------
Resolution: Fixed
commit to master, thanks for reviewing!
https://github.com/apache/kylin/commit/6ea03b8638d72853959aba0666aea18f1ba97391
> Reduce the size of metadata uploaded to distributed cache
> ---------------------------------------------------------
>
> Key: KYLIN-2328
> URL: https://issues.apache.org/jira/browse/KYLIN-2328
> Project: Kylin
> Issue Type: Improvement
> Components: Job Engine
> Affects Versions: all
> Reporter: Dayue Gao
> Assignee: Dayue Gao
> Fix For: v2.0.0
>
> Attachments: KYLIN-2328.patch
>
>
> Currently, each MR job uploads all the metadata belonging to a cube to distributed cache. When the total size of metadata increases, the submission time ("MapReduce Waiting" at Monitor UI) also increases and could become a significant problem.
> We could actually optimize the amount of metadata uploaded according to the type of job, for example
> * CuboidJob only needs dictionary of the building segment
> * CubeHFileJob doesn't need any dictionary
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