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Date: Fri, 1 Feb 2013 22:54:12 +0000 (UTC)
From: "Suresh Srinivas (JIRA)" <jira@apache.org>
To: hdfs-dev@hadoop.apache.org
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Subject: [jira] [Created] (HDFS-4465) Optimize datanode ReplicasMap and
 ReplicaInfo
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Suresh Srinivas created HDFS-4465:
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             Summary: Optimize datanode ReplicasMap and ReplicaInfo
                 Key: HDFS-4465
                 URL: https://issues.apache.org/jira/browse/HDFS-4465
             Project: Hadoop HDFS
          Issue Type: Improvement
          Components: datanode
            Reporter: Suresh Srinivas
            Assignee: Suresh Srinivas


In Hadoop a lot of optimization has been done in namenode data structures to be memory efficient. Similar optimizations are necessary for Datanode process. With the growth in storage per datanode and number of blocks hosted on datanode, this jira intends to optimize long lived ReplicasMap and ReplicaInfo objects.

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