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Posted to dev@flink.apache.org by "Greg Hogan (JIRA)" <ji...@apache.org> on 2016/01/22 18:51:40 UTC
[jira] [Created] (FLINK-3279) Optionally disable DistinctOperator
combiner
Greg Hogan created FLINK-3279:
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Summary: Optionally disable DistinctOperator combiner
Key: FLINK-3279
URL: https://issues.apache.org/jira/browse/FLINK-3279
Project: Flink
Issue Type: New Feature
Components: DataSet API
Affects Versions: 1.0.0
Reporter: Greg Hogan
Priority: Minor
Calling {{DataSet.distinct()}} executes {{DistinctOperator.DistinctFunction}} which is a combinable {{RichGroupReduceFunction}}. Sometimes we know that there will be few duplicate records and disabling the combine would improve performance.
I propose adding {{public DistinctOperator<T> setCombinable(boolean combinable)}} to {{DistinctOperator}}.
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