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From "Anoop Sam John (JIRA)" <j...@apache.org>
Subject [jira] [Created] (HBASE-16651) LRUBlockCache#returnBlock should try return block to Victim Handler L2 cache.
Date Sun, 18 Sep 2016 17:21:20 GMT
Anoop Sam John created HBASE-16651:
--------------------------------------

             Summary: LRUBlockCache#returnBlock should try return block to Victim Handler
L2 cache.
                 Key: HBASE-16651
                 URL: https://issues.apache.org/jira/browse/HBASE-16651
             Project: HBase
          Issue Type: Sub-task
    Affects Versions: 2.0.0
            Reporter: Anoop Sam John
            Assignee: Anoop Sam John
             Fix For: 2.0.0


In case of L1 and L2 cache usage with combinedMode = false, L2 is used as a victim handler
cache for L1 cache.  When a getBlock() request comes, L1 will see if block is in it and if
not it will try to provide the block from L2 cache. In such a case, the return block must
return the block to L2 cache and count down the ref count for the block.  But right now we
just ignore the returnBlock call in LRUCache



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