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Posted to hdfs-dev@hadoop.apache.org by "Kihwal Lee (JIRA)" <ji...@apache.org> on 2013/12/02 18:26:36 UTC

[jira] [Created] (HDFS-5586) Add quick-restart option for datanode

Kihwal Lee created HDFS-5586:
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             Summary: Add quick-restart option for datanode
                 Key: HDFS-5586
                 URL: https://issues.apache.org/jira/browse/HDFS-5586
             Project: Hadoop HDFS
          Issue Type: Sub-task
            Reporter: Kihwal Lee


This feature, combined with the graceful shutdown feature, will enable data nodes to come back up and start serving quickly.  This is likely a command line option for data node, which triggers it to look for saved state information in its local storage.  If the information is present and reasonably up-to-date, data node would skip some of the startup steps.

Ideally it should be able to do quick registration without requiring removal of all blocks from the date node descriptor on the name node and reconstructing it with the initial full block report. 



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