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From "Todd Lipcon (Created) (JIRA)" <j...@apache.org>
Subject [jira] [Created] (HADOOP-8069) Enable TCP_NODELAY by default for IPC
Date Tue, 14 Feb 2012 04:12:59 GMT
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

I think we should switch the default for the IPC client and server NODELAY options to true.
As wikipedia says:
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.
Since our IPC layer is well contained and does its own buffering, we shouldn't be careless.

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