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https://issues.apache.org/jira/browse/FLINK-3480?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
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vinoyang reassigned FLINK-3480:
-------------------------------
Assignee: vinoyang
> Add hash-based strategy for ReduceFunction
> ------------------------------------------
>
> Key: FLINK-3480
> URL: https://issues.apache.org/jira/browse/FLINK-3480
> Project: Flink
> Issue Type: Sub-task
> Components: Runtime / Operators
> Reporter: Fabian Hueske
> Assignee: vinoyang
> Priority: Major
>
> This issue is related to FLINK-3477.
> While FLINK-3477 proposes to add hash-based combine strategy for
> ReduceFunction, this issue aims to add a hash-based strategy for the final
> aggregation.
> This will need again a special hash-table aggregation which allows for
> in-place updates and append updates. However, it also needs to support
> spilling to disk in case of too tight memory budgets.
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