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https://issues.apache.org/jira/browse/HADOOP-1841?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel#action_12548022
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dhruba borthakur commented on HADOOP-1841:
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Mukubd: Thanks for running the performance numbers.
Doug: This patch (by itself) will not improve performance. It is mostly a bug
fix. Koji's earlier comment describes how slow clients caused a
denial-of-service of the namenode on a real cluster. Mukund's performance runs
show that performance is not impacted. However, I plan on attempting a
follow-on patch to NameNode that will move the sync-to-edits-log from occuring
in the RPC Handler thread, thus possibly improving scalability. Do you think
that this patch is good to go?
Owen: would you like to review the code again?
> IPC server should write repsonses asynchronously
> ------------------------------------------------
>
> Key: HADOOP-1841
> URL: https://issues.apache.org/jira/browse/HADOOP-1841
> Project: Hadoop
> Issue Type: Improvement
> Components: ipc
> Reporter: Doug Cutting
> Assignee: dhruba borthakur
> Attachments: asyncRPC-2.patch, asyncRPC-4.patch, asyncRPC.patch,
> asyncRPC.patch
>
>
> Hadoop's IPC Server currently writes responses from request handler threads
> using blocking writes. Performance and scalability might be improved if
> responses were written asynchronously.
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