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Posted to hdfs-dev@hadoop.apache.org by "Aaron T. Myers (JIRA)" <ji...@apache.org> on 2013/07/24 02:20:49 UTC

[jira] [Created] (HDFS-5027) On startup, DN should scan volumes in parallel

Aaron T. Myers created HDFS-5027:
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             Summary: On startup, DN should scan volumes in parallel
                 Key: HDFS-5027
                 URL: https://issues.apache.org/jira/browse/HDFS-5027
             Project: Hadoop HDFS
          Issue Type: Improvement
          Components: datanode
    Affects Versions: 2.0.4-alpha
            Reporter: Aaron T. Myers
            Assignee: Aaron T. Myers


On startup the DN must scan all replicas on all configured volumes before the initial block report to the NN. This is currently done serially, but can be done in parallel to improve startup time of the DN.

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