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From "Daryn Sharp (JIRA)" <j...@apache.org>
Subject [jira] [Created] (HDFS-6773) MiniDFSCluster can run dramatically faster
Date Tue, 29 Jul 2014 21:59:39 GMT
Daryn Sharp created HDFS-6773:
---------------------------------

             Summary: MiniDFSCluster can run dramatically faster
                 Key: HDFS-6773
                 URL: https://issues.apache.org/jira/browse/HDFS-6773
             Project: Hadoop HDFS
          Issue Type: Improvement
          Components: namenode
    Affects Versions: 2.0.0-alpha, 3.0.0
            Reporter: Daryn Sharp


The mini cluster is unnecessarily running with durable edit logs.  The following change cut
runtime of a single test from ~30s to ~10s.

{code}EditLogFileOutputStream.setShouldSkipFsyncForTesting(true);{code}

The mini cluster should default to this behavior after identifying the few edit log tests
that probably depend on durable logs.



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