[jira] Created: (HDFS-1071) savenamespace should write the fsimage to all configured fs.name.dir in parallel

["dhruba borthakur (JIRA)" <ji...@apache.org>]

savenamespace should write the fsimage to all configured fs.name.dir in parallel
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                 Key: HDFS-1071
                 URL: https://issues.apache.org/jira/browse/HDFS-1071
             Project: Hadoop HDFS
          Issue Type: Improvement
          Components: name-node
            Reporter: dhruba borthakur
            Assignee: Dmytro Molkov


If you have a large number of files in HDFS, the fsimage file is very big. When the namenode restarts, it writes a copy of the fsimage to all directories configured in fs.name.dir. This takes a long time, especially if there are many directories in fs.name.dir. Make the NN write the fsimage to all these directories in parallel.

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