[jira] [Created] (FLINK-13800) Create a module for spill-able heap backend

[Shang Yuanchun (Jira)]

Yu Li created FLINK-13800:
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             Summary: Create a module for spill-able heap backend
                 Key: FLINK-13800
                 URL: https://issues.apache.org/jira/browse/FLINK-13800
             Project: Flink
          Issue Type: Sub-task
          Components: Runtime / State Backends
            Reporter: Yu Li


According to further discussions in [ML|http://apache-flink-mailing-list-archive.1008284.n3.nabble.com/DISCUSS-FLIP-50-Spill-able-Heap-Keyed-State-Backend-td31680.html] and [FLIP-50|https://cwiki.apache.org/confluence/display/FLINK/FLIP-50%3A+Spill-able+Heap+Keyed+State+Backend], we will create a new backend instead of modifying the existing {{HeapKeyedStateBackend}}, to prevent any surprise for existing in-production usage (and only change the spill-able one to default in future if proven to be stable).

This JIRA aims at creating a sub-module under the {{flink-state-backends}} module for the spill-able heap backend.



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