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https://issues.apache.org/jira/browse/STORM-2782?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=16225368#comment-16225368
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Robert Joseph Evans commented on STORM-2782:
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2.x should be fine. No one else but you has been asking for this, and it is
going to be a real pain to try and make it backwards compatible. So if someone
else speaks up and says that they really want it we can look into how to
support them.
> Refactor partial key grouping for greater flexibility
> -----------------------------------------------------
>
> Key: STORM-2782
> URL: https://issues.apache.org/jira/browse/STORM-2782
> Project: Apache Storm
> Issue Type: Improvement
> Components: storm-core
> Reporter: Kevin Peek
> Assignee: Kevin Peek
> Priority: Minor
> Labels: pull-request-available
> Fix For: 2.0.0
>
> Time Spent: 3h 10m
> Remaining Estimate: 0h
>
> My organization needed behavior similar to the PartialKeyGrouping. This is a
> port of our refactoring which makes it possible to use the PartialkeyGrouping
> in new ways. The simplest such usecase would be to send tuples to one out of
> N downstream instances instead of always one out of two.
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