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Posted to common-dev@hadoop.apache.org by "Todd Lipcon (JIRA)" <ji...@apache.org> on 2011/07/06 06:36:16 UTC

[jira] [Created] (HADOOP-7443) Add CRC32C as another DataChecksum implementation

Add CRC32C as another DataChecksum implementation
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                 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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