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Posted to hdfs-dev@hadoop.apache.org by "Suresh Srinivas (JIRA)" <ji...@apache.org> on 2013/03/28 01:25:15 UTC

[jira] [Created] (HDFS-4645) Move from randomly generated block ID to sequentially generated block ID

Suresh Srinivas created HDFS-4645:
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             Summary: Move from randomly generated block ID to sequentially generated block ID
                 Key: HDFS-4645
                 URL: https://issues.apache.org/jira/browse/HDFS-4645
             Project: Hadoop HDFS
          Issue Type: Improvement
          Components: namenode
    Affects Versions: 3.0.0
            Reporter: Suresh Srinivas
            Assignee: Suresh Srinivas


Currently block IDs are randomly generated. This means there is no pattern to block ID generation and no guarantees such as uniqueness of block ID for the life time of the system can be made. I propose using SequentialNumber for block ID generation.

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