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https://issues.apache.org/jira/browse/HADOOP-10599?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
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Erik Krogen updated HADOOP-10599:
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Labels: qos rpc (was: )
> 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
> Components: ipc
> Reporter: Ming Ma
> Priority: Major
> Labels: qos, rpc
>
> 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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