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From "Owen O'Malley (JIRA)" <j...@apache.org>
Subject [jira] Created: (HADOOP-5598) Implement a pure Java CRC32 calculator
Date Tue, 31 Mar 2009 12:19:51 GMT
Implement a pure Java CRC32 calculator
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                 Key: HADOOP-5598
                 URL: https://issues.apache.org/jira/browse/HADOOP-5598
             Project: Hadoop Core
          Issue Type: Improvement
          Components: dfs
            Reporter: Owen O'Malley
            Assignee: Owen O'Malley


We've seen single replica HDFS write spending too much of their time in crc32 calculation.
On a 200 MB write, the crc it is taking 5 seconds of the 6 seconds total.

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