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https://issues.apache.org/jira/browse/HDFS-4465?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=13569329#comment-13569329
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Suresh Srinivas commented on HDFS-4465:
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Aaron, given you have worked on it, if you want, feel free to assign this jira
to yourself.
> 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
> Attachments: dn-memory-improvements.patch
>
>
> 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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