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Posted to common-dev@hadoop.apache.org by "Todd Lipcon (Created) (JIRA)" <ji...@apache.org> on 2012/02/14 05:12:59 UTC

[jira] [Created] (HADOOP-8069) Enable TCP_NODELAY by default for IPC

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:
{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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