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From "James Thomas (JIRA)" <j...@apache.org>
Subject [jira] [Created] (HDFS-6482) Use block ID-based block layout on datanodes
Date Tue, 03 Jun 2014 20:50:02 GMT
James Thomas created HDFS-6482:

             Summary: Use block ID-based block layout on datanodes
                 Key: HDFS-6482
                 URL: https://issues.apache.org/jira/browse/HDFS-6482
             Project: Hadoop HDFS
          Issue Type: Improvement
          Components: datanode
    Affects Versions: 2.5.0
            Reporter: James Thomas
            Assignee: James Thomas
             Fix For: 2.5.0

Right now blocks are placed into directories that are split into many subdirectories when
capacity is reached. Instead we can use a block's ID to determine the path it should go in.
This eliminates the need for the LDir data structure that facilitates the splitting of directories
when they reach capacity as well as fields in ReplicaInfo that keep track of a replica's location.

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