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From "Todd Lipcon (Created) (JIRA)" <j...@apache.org>
Subject [jira] [Created] (HDFS-3053) Support for true zero-copy (mmap-based) reads
Date Tue, 06 Mar 2012 08:51:00 GMT
Support for true zero-copy (mmap-based) reads
---------------------------------------------

                 Key: HDFS-3053
                 URL: https://issues.apache.org/jira/browse/HDFS-3053
             Project: Hadoop HDFS
          Issue Type: New Feature
          Components: hdfs client
            Reporter: Todd Lipcon


Continuing a discussion started in HDFS-2834, it would be slick to provide support for a true
zero-copy read API. In this style API, rather than having the user pass buffers to read into,
the DFS client would provide buffers to the user. This allows the client to pass slices of
mmaped blocks, for example, which can cut one or two copies out of many read scenarios.

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