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Posted to hdfs-dev@hadoop.apache.org by "Hairong Kuang (JIRA)" <ji...@apache.org> on 2011/03/30 01:17:06 UTC

[jira] [Created] (HDFS-1796) Switch NameNode to use non-fair locks

Switch NameNode to use non-fair locks
-------------------------------------

                 Key: HDFS-1796
                 URL: https://issues.apache.org/jira/browse/HDFS-1796
             Project: Hadoop HDFS
          Issue Type: Improvement
            Reporter: Hairong Kuang


According to JavaDoc, a non-fair lock will normally have higher throughput than a fair lock. Our experiment also shows an improved performance when using a non-fair lock. We should switch namenode to use non-fair locks.

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