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Posted to issues@beam.apache.org by "ASF GitHub Bot (JIRA)" <ji...@apache.org> on 2019/03/12 14:06:00 UTC

[jira] [Work logged] (BEAM-6670) Option to disable reparallelization in JdbcIO.Read

     [ https://issues.apache.org/jira/browse/BEAM-6670?focusedWorklogId=211731&page=com.atlassian.jira.plugin.system.issuetabpanels:worklog-tabpanel#worklog-211731 ]

ASF GitHub Bot logged work on BEAM-6670:
----------------------------------------

                Author: ASF GitHub Bot
            Created on: 12/Mar/19 14:05
            Start Date: 12/Mar/19 14:05
    Worklog Time Spent: 10m 
      Work Description: aromanenko-dev commented on issue #7956: [BEAM-6670] Add option to disable reshuffling of JdbcIO
URL: https://github.com/apache/beam/pull/7956#issuecomment-472014560
 
 
   @jkff As an author of this original improvement [BEAM-2803](https://issues.apache.org/jira/browse/BEAM-2803) (side input and reshuffle), could you take a look on this PR? Thanks
 
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Issue Time Tracking
-------------------

    Worklog Id:     (was: 211731)
    Time Spent: 20m  (was: 10m)

> Option to disable reparallelization in JdbcIO.Read
> --------------------------------------------------
>
>                 Key: BEAM-6670
>                 URL: https://issues.apache.org/jira/browse/BEAM-6670
>             Project: Beam
>          Issue Type: Wish
>          Components: io-java-jdbc
>            Reporter: Mike Pedersen
>            Priority: Minor
>          Time Spent: 20m
>  Remaining Estimate: 0h
>
> I'm doing approx. 20 JDBC queries against a database and then joining them together in a group by. Every single one of these queries does a reshuffle, which is sort of useless due to them being fed to a CoGroupByKey immediately afterwards.
> Reshuffle by default seems sensible by the principle of least surprise, but it would be nice to have a way to disable it when it's not necessary. For example a "withReshuffle(boolean)" method. 
> This should be an easy addition and I am willing to add this if it sounds reasonable enough.



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