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From "Todd Lipcon (JIRA)" <j...@apache.org>
Subject [jira] [Created] (HDFS-3529) Use direct buffers for data in write path
Date Tue, 12 Jun 2012 22:30:43 GMT
Todd Lipcon created HDFS-3529:
---------------------------------

             Summary: Use direct buffers for data in write path
                 Key: HDFS-3529
                 URL: https://issues.apache.org/jira/browse/HDFS-3529
             Project: Hadoop HDFS
          Issue Type: Improvement
          Components: data-node, performance
    Affects Versions: 2.0.0-alpha
            Reporter: Todd Lipcon
            Assignee: Todd Lipcon


The write path currently makes several unnecessary data copies in order to go to and from
byte arrays. We can improve performance by using direct byte buffers to avoid the copy. This
is also a prerequisite for native checksum calculation (HDFS-3528)

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