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https://issues.apache.org/jira/browse/FLINK-6220?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
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Robert Metzger updated FLINK-6220:
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Component/s: State Backends, Checkpointing
> Fine-grained copy-on-write for Heap(Map/List)States in CopyOnWriteStateTable
> ----------------------------------------------------------------------------
>
> Key: FLINK-6220
> URL: https://issues.apache.org/jira/browse/FLINK-6220
> Project: Flink
> Issue Type: Improvement
> Components: State Backends, Checkpointing
> Affects Versions: 1.3.0
> Reporter: Stefan Richter
> Priority: Minor
>
> Currently, the copy-on-write mechanism in {{CopyOnWriteStateTable}} uses
> serializers to create copies of state objects. In case of
> {{Heap(Map/List)State}}, those state objects are collections, and a deep
> copy-on-write is performed on those collections as a whole. We can
> investigate ways to track changes on a more fine grained level, for example
> deep copy only individual entries in the lists or maps.
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