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Posted to commits@beam.apache.org by "ASF GitHub Bot (JIRA)" <ji...@apache.org> on 2017/04/09 19:48:41 UTC

[jira] [Commented] (BEAM-1294) Long running UnboundedSource Readers

    [ https://issues.apache.org/jira/browse/BEAM-1294?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=15962245#comment-15962245 ] 

ASF GitHub Bot commented on BEAM-1294:
--------------------------------------

Github user asfgit closed the pull request at:

    https://github.com/apache/beam/pull/2033


> Long running UnboundedSource Readers
> ------------------------------------
>
>                 Key: BEAM-1294
>                 URL: https://issues.apache.org/jira/browse/BEAM-1294
>             Project: Beam
>          Issue Type: Improvement
>          Components: runner-spark
>            Reporter: Amit Sela
>            Assignee: Aviem Zur
>
> When reading from an UnboundedSource, current implementation will cause each split to create a new Reader every micro-batch.
> As long as the overhead of creating a reader is relatively low, it's reasonable (though I'd still be happy to get rid of), but in cases where the creation overhead is large it becomes unreasonable forcing large batches.
> One way to solve this could be to create a pool of lazy-init readers to serve each executor, maybe via Broadcast variables. 



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