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Posted to issues@beam.apache.org by "Kenneth Knowles (Jira)" <ji...@apache.org> on 2022/01/12 03:51:04 UTC

[jira] [Updated] (BEAM-6819) Remote sources provide insufficient metadata about relative sizes of splits

     [ https://issues.apache.org/jira/browse/BEAM-6819?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel ]

Kenneth Knowles updated BEAM-6819:
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This Jira ticket has a pull request attached to it, but is still open. Did the pull request resolve the issue? If so, could you please mark it resolved? This will help the project have a clear view of its open issues.

> Remote sources provide insufficient metadata about relative sizes of splits
> ---------------------------------------------------------------------------
>
>                 Key: BEAM-6819
>                 URL: https://issues.apache.org/jira/browse/BEAM-6819
>             Project: Beam
>          Issue Type: Improvement
>          Components: sdk-java-core
>            Reporter: Sunil Pedapudi
>            Priority: P3
>              Labels: Clarified
>          Time Spent: 10m
>  Remaining Estimate: 0h
>
> In the current split protocol, SourceMetadata is reported for the initial parent source. Subsequent splits drop the SourceMetadata. Without this additional information, downstream systems make simplifying assumptions that result in decorrelation between input fraction and the actual fraction of input represented by a task. 
> This decorrelation of input fraction has cascading negative effects for any system relying on trends in input fraction (eg., Cloud Dataflow's autotuning).



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