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Posted to issues@flink.apache.org by "ASF GitHub Bot (JIRA)" <ji...@apache.org> on 2016/04/05 17:20:25 UTC
[jira] [Commented] (FLINK-3614) Remove Non-Keyed Window Operator
[ https://issues.apache.org/jira/browse/FLINK-3614?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=15226443#comment-15226443 ]
ASF GitHub Bot commented on FLINK-3614:
---------------------------------------
Github user aljoscha commented on the pull request:
https://github.com/apache/flink/pull/1805#issuecomment-205855000
Manually merged.
> Remove Non-Keyed Window Operator
> --------------------------------
>
> Key: FLINK-3614
> URL: https://issues.apache.org/jira/browse/FLINK-3614
> Project: Flink
> Issue Type: Improvement
> Components: Streaming
> Reporter: Aljoscha Krettek
> Assignee: Aljoscha Krettek
>
> I propose to remove the special Non-Keyed Window Operator and implement non-parallel windows by using the standard WindowOperator with a dummy KeySelector.
> Maintaining everything for two WindowOperators is a huge burden. The implementation is completely separate by now. For example, the Non-Keyed window operator does not use the StateBackend for state, i.e. cannot use RocksDB. Also, with upcoming changes (Merging/Session windows, aligned windows) this will only increase the maintenance burden.
> Also, the fast AlignedProcessingTimeWindows operators also only support the Parallel/Keyed case.
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