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From "Ming Ma (JIRA)" <j...@apache.org>
Subject [jira] [Created] (HADOOP-10599) Support prioritization of DN RPCs over client RPCs
Date Tue, 13 May 2014 04:13:14 GMT
Ming Ma created HADOOP-10599:
--------------------------------

             Summary: Support prioritization of DN RPCs over client RPCs
                 Key: HADOOP-10599
                 URL: https://issues.apache.org/jira/browse/HADOOP-10599
             Project: Hadoop Common
          Issue Type: Sub-task
            Reporter: Ming Ma


We might need to prioritize DN RPC over client RPC so that no matter what application do to
NN RPC and FSNamesystem's global lock, DN's requests will be processed timely. After a cluster
is configured to have service RPC server separated from client RPC server, it is mitigated
to some degree with fair FSNamesystem's global lock. Also if the NN global lock can be made
more fine grained; such need becomes less important. Still, it will be good to evaluate if
this is a good option.



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