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From "Todd Lipcon (JIRA)" <j...@apache.org>
Subject [jira] [Created] (HADOOP-7443) Add CRC32C as another DataChecksum implementation
Date Wed, 06 Jul 2011 04:36:16 GMT
Add CRC32C as another DataChecksum implementation

                 Key: HADOOP-7443
                 URL: https://issues.apache.org/jira/browse/HADOOP-7443
             Project: Hadoop Common
          Issue Type: New Feature
          Components: io, util
            Reporter: Todd Lipcon
            Assignee: Todd Lipcon

CRC32C is another checksum very similar to our existing CRC32, but with a different polynomial.
The chief advantage of this other polynomial is that SSE4.2 includes hardware support for
its calculation. HDFS-2080 is the umbrella JIRA which proposes using this new polynomial to
save substantial amounts of CPU.

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