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https://issues.apache.org/jira/browse/MAPREDUCE-284?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=12738902#action_12738902
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Devaraj Das commented on MAPREDUCE-284:
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I still don't see a strong reason for reducing the ping interval. Also, I am
worried about the approach followed in the patch. In particular, i don't like
the way that ping interval is hardcoded to 5 seconds in the Child process
(overriding the configuration passed). I also think that in the current
implementation, it affects the task->namenode ping interval which is not
desirable.
I propose that for this patch, we just fix the case of TCP_NODELAY being ON by
default.
Thoughts?
> Improvements to RPC between Child and TaskTracker
> -------------------------------------------------
>
> Key: MAPREDUCE-284
> URL: https://issues.apache.org/jira/browse/MAPREDUCE-284
> Project: Hadoop Map/Reduce
> Issue Type: Improvement
> Reporter: Arun C Murthy
> Assignee: Ravi Gummadi
> Attachments: MR-284.patch
>
>
> We could improve the RPC between the Child and TaskTracker:
> * Set ping interval lower by default to 5s
> * Disable nagle's algorithm (tcp no-delay)
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