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https://issues.apache.org/jira/browse/HADOOP-7443?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
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Todd Lipcon updated HADOOP-7443:
--------------------------------
Attachment: hadoop-7443.txt
Fairly simple patch which adds the new CRC algorithm. The tables are taken from
some Intel sample code under the BSD license, as attributed in the LICENSE file
in this diff.
> 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
> Attachments: hadoop-7443.txt
>
>
> 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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