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From "Colin Patrick McCabe (JIRA)" <j...@apache.org>
Subject [jira] [Created] (HDFS-8026) Trace FSOutputSummer#writeChecksumChunks rather than DFSOutputStream#writeChunk
Date Tue, 31 Mar 2015 02:03:52 GMT
Colin Patrick McCabe created HDFS-8026:
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             Summary: Trace FSOutputSummer#writeChecksumChunks rather than DFSOutputStream#writeChunk
                 Key: HDFS-8026
                 URL: https://issues.apache.org/jira/browse/HDFS-8026
             Project: Hadoop HDFS
          Issue Type: Bug
    Affects Versions: 2.7.0
            Reporter: Colin Patrick McCabe
            Assignee: Colin Patrick McCabe
            Priority: Minor


We should trace FSOutputSummer#writeChecksumChunks rather than DFSOutputStream#writeChunk.
 When tracing writeChunk, we get a new trace span every 512 bytes; when tracing writeChecksumChunks,
we normally get a new trace span only when the FSOutputSummer buffer is full (9x less often.)



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