[jira] [Created] (FLINK-12697) Support on-disk state storage for HeapKeyedStateBackend

[Shang Yuanchun (Jira)]

Yu Li created FLINK-12697:
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             Summary: Support on-disk state storage for HeapKeyedStateBackend
                 Key: FLINK-12697
                 URL: https://issues.apache.org/jira/browse/FLINK-12697
             Project: Flink
          Issue Type: Sub-task
          Components: Runtime / State Backends
            Reporter: Yu Li
            Assignee: Yu Li


We need to store state on disk after spilling, and to support this, we need:
1. A data structure to efficiently support copy-on-write for asynchronous snapshot
2. An allocator to allocate and manage chunks from the memory mapped file(s)



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