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https://issues.apache.org/jira/browse/HADOOP-7443?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=13065182#comment-13065182
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Hudson commented on HADOOP-7443:
--------------------------------
Integrated in Hadoop-Common-trunk #746 (See
[https://builds.apache.org/job/Hadoop-Common-trunk/746/])
HADOOP-7443. Add CRC32C as another DataChecksum implementation. Contributed
by Todd Lipcon.
todd : http://svn.apache.org/viewcvs.cgi/?root=Apache-SVN&view=rev&rev=1146300
Files :
*
/hadoop/common/trunk/common/src/test/core/org/apache/hadoop/util/TestPureJavaCrc32.java
* /hadoop/common/trunk/common/CHANGES.txt
*
/hadoop/common/trunk/common/src/test/core/org/apache/hadoop/util/TestDataChecksum.java
* /hadoop/common/trunk/common/src/java/org/apache/hadoop/util/DataChecksum.java
*
/hadoop/common/trunk/common/src/java/org/apache/hadoop/util/PureJavaCrc32C.java
> 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
> Fix For: 0.23.0
>
> Attachments: hadoop-7443.txt, 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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