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From "Eugene Kirpichov (JIRA)" <j...@apache.org>
Subject [jira] [Commented] (BEAM-638) Add sink transform to write bounded data per window, pane, [and key] even when PCollection is unbounded
Date Wed, 03 May 2017 16:31:04 GMT

    [ https://issues.apache.org/jira/browse/BEAM-638?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=15995167#comment-15995167
] 

Eugene Kirpichov commented on BEAM-638:
---------------------------------------

TextIO and AvroIO can now write unbounded data, producing one or more files per window.
See https://github.com/apache/beam/blob/master/examples/java/src/main/java/org/apache/beam/examples/WindowedWordCount.java#L210
and https://github.com/apache/beam/blob/master/examples/java/src/main/java/org/apache/beam/examples/common/WriteOneFilePerWindow.java

> Add sink transform to write bounded data per window, pane, [and key] even when PCollection
is unbounded
> -------------------------------------------------------------------------------------------------------
>
>                 Key: BEAM-638
>                 URL: https://issues.apache.org/jira/browse/BEAM-638
>             Project: Beam
>          Issue Type: New Feature
>          Components: sdk-java-core
>            Reporter: Jean-Baptiste Onofré
>            Assignee: Davor Bonaci
>
> Today, if the pipeline source is unbounded, and the sink expects a bounded collection,
there's no way to use a single pipeline. Even a window creates a chunk on the unbounded PCollection,
but the "sub" PCollection is still unbounded.
> It would be helpful for users to have a Window function that create a bounded PCollection
(on the window) from an unbounded PCollection coming from the source.



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