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From "Nicolas Liochon (JIRA)" <j...@apache.org>
Subject [jira] [Created] (HBASE-11504) Don't flush the socket buffer for each response
Date Fri, 11 Jul 2014 10:36:04 GMT
Nicolas Liochon created HBASE-11504:

             Summary: Don't flush the socket buffer for each response
                 Key: HBASE-11504
                 URL: https://issues.apache.org/jira/browse/HBASE-11504
             Project: HBase
          Issue Type: Improvement
          Components: Client, regionserver
    Affects Versions: 0.99.0, 0.98.5
            Reporter: Nicolas Liochon
            Assignee: Nicolas Liochon
             Fix For: 0.99.0, 0.98.5

today we flush the socket buffer after each response.

The server maintains a queue of the calls to write. If this queue is not empty, we should
not flush. We should do that only when the queue is empty. This will save some packets when
nagle is disabled and we have a list of small responses to send (for example responses to
puts, or small gets). This is linked to HBASE-11492.

The client has a queue as well, so we could do the same thing there.

There could be some drawbacks (if the server is overloaded between multiple channel for example
writing the next response may take time), but it seems a good thing to do. For example, if
the server if overloaded saving on buffer flush seems to be a nice thing to do.

Any opinion?
It's something I plan to do if I don't find a major drawback.

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