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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