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https://issues.apache.org/jira/browse/BEAM-840?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
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Ismaël Mejía updated BEAM-840:
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Component/s: (was: z-do-not-use-sdk-java-extensions)
sdk-java-sorter
> Add Java SDK extension to support non-distributed sorting
> ---------------------------------------------------------
>
> Key: BEAM-840
> URL: https://issues.apache.org/jira/browse/BEAM-840
> Project: Beam
> Issue Type: New Feature
> Components: sdk-java-sorter
> Reporter: Mitch Shanklin
> Assignee: Mitch Shanklin
> Priority: Minor
> Fix For: 0.4.0
>
>
> Add an extension that provides a PTransform which performs
> local(non-distributed) sorting. It will sort in memory until the buffer is
> full, then flush to disk and use external sorting.
>
> Consumes a PCollection of KVs from primary key to iterable of secondary key
> and value KVs and sorts the iterables. Would probably be called after a
> GroupByKey. Uses coders to convert secondary keys and values into byte arrays
> and does a lexicographical comparison on the secondary keys.
> Uses Hadoop as an external sorting library.
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