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Posted to hdfs-issues@hadoop.apache.org by "Suresh Srinivas (JIRA)" <ji...@apache.org> on 2013/06/20 00:06:21 UTC

[jira] [Commented] (HDFS-4465) Optimize datanode ReplicasMap and ReplicaInfo

    [ https://issues.apache.org/jira/browse/HDFS-4465?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=13688526#comment-13688526 ] 

Suresh Srinivas commented on HDFS-4465:
---------------------------------------

Aaron, I will review this as soon as I can, unless others beat me to it. This is a good change to get into 2.1.0-beta.
                
> 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
>    Affects Versions: 2.0.5-alpha
>            Reporter: Suresh Srinivas
>            Assignee: Aaron T. Myers
>         Attachments: dn-memory-improvements.patch, HDFS-4465.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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