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Posted to issues@hbase.apache.org by "Zheng Hu (JIRA)" <ji...@apache.org> on 2019/02/26 07:53:00 UTC

[jira] [Created] (HBASE-21957) Unify refCount of BucketEntry and refCount of hbase.nio.ByteBuff into one

Zheng Hu created HBASE-21957:
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             Summary: Unify refCount of BucketEntry and refCount of hbase.nio.ByteBuff into one
                 Key: HBASE-21957
                 URL: https://issues.apache.org/jira/browse/HBASE-21957
             Project: HBase
          Issue Type: Sub-task
            Reporter: Zheng Hu
            Assignee: Zheng Hu


After HBASE-12295, we have block with MemoryType.SHARED or MemoryType.EXCLUSIVE, the block in offheap BucketCache will be shared, and have an reference count to track its life cycle.  If no rpc reference to the shared block, then the block can be evicted. 

while after the HBASE-21916,  we introduced an refcount for ByteBuff,  then I think we can unify the two into one.  tried to fix this when preparing patch for HBASE-21879, but seems can be different sub-task, and it won't affect the main logic of HBASE-21879,  so create a seperate one. 



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