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From "Stefan Richter (JIRA)" <j...@apache.org>
Subject [jira] [Created] (FLINK-6220) Fine-grained copy-on-write for Heap(Map/List)States in CopyOnWriteStateTable
Date Thu, 30 Mar 2017 13:01:41 GMT
Stefan Richter created FLINK-6220:
-------------------------------------

             Summary: 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
    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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