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https://issues.apache.org/jira/browse/HADOOP-8069?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=14073779#comment-14073779
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Arpit Agarwal commented on HADOOP-8069:
---------------------------------------
It makes a lot of sense to enable TCP_NODELAY by default. Any thoughts on
moving forward with Todd's patch? I'd be +1 on changing the defaults while
leaving the setting documented.
> Enable TCP_NODELAY by default for IPC
> -------------------------------------
>
> Key: HADOOP-8069
> URL: https://issues.apache.org/jira/browse/HADOOP-8069
> Project: Hadoop Common
> Issue Type: Improvement
> Components: ipc
> Affects Versions: 0.23.0
> Reporter: Todd Lipcon
> Assignee: Todd Lipcon
> Attachments: hadoop-8069.txt
>
>
> I think we should switch the default for the IPC client and server NODELAY
> options to true. As wikipedia says:
> {quote}
> In general, since Nagle's algorithm is only a defense against careless
> applications, it will not benefit a carefully written application that takes
> proper care of buffering; the algorithm has either no effect, or negative
> effect on the application.
> {quote}
> Since our IPC layer is well contained and does its own buffering, we
> shouldn't be careless.
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