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Posted to hdfs-dev@hadoop.apache.org by "Arpit Agarwal (JIRA)" <ji...@apache.org> on 2013/08/20 21:28:52 UTC

[jira] [Created] (HDFS-5115) Make StorageID a UUID

Arpit Agarwal created HDFS-5115:
-----------------------------------

             Summary: Make StorageID a UUID
                 Key: HDFS-5115
                 URL: https://issues.apache.org/jira/browse/HDFS-5115
             Project: Hadoop HDFS
          Issue Type: Sub-task
          Components: datanode
    Affects Versions: 3.0.0
            Reporter: Arpit Agarwal
            Assignee: Arpit Agarwal


The Storage ID is currently generated from the DataNode's IP+Port+Random components. This scheme will not work when we have separate Storage IDs for each storage directory as there is a possibility of conflicts when an unreliable storage is intermittently offline.

Converting it to a UUID makes collisions very unlikely.

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