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Posted to issues@beam.apache.org by "Pablo Estrada (Jira)" <ji...@apache.org> on 2019/09/04 23:11:00 UTC

[jira] [Updated] (BEAM-4786) Distinct has bad parallelism characteristics

     [ https://issues.apache.org/jira/browse/BEAM-4786?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel ]

Pablo Estrada updated BEAM-4786:
--------------------------------
    Labels: ccoss2019  (was: )

> Distinct has bad parallelism characteristics
> --------------------------------------------
>
>                 Key: BEAM-4786
>                 URL: https://issues.apache.org/jira/browse/BEAM-4786
>             Project: Beam
>          Issue Type: Bug
>          Components: sdk-java-core
>            Reporter: Pablo Estrada
>            Assignee: Pablo Estrada
>            Priority: Major
>              Labels: ccoss2019
>
> Distinct groups first and then drops extra elements. Should drop elements in the mappers, and later in reducers.
> https://github.com/apache/beam/blob/master/sdks/java/core/src/main/java/org/apache/beam/sdk/transforms/Distinct.java#L100



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