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From "Aaron T. Myers (JIRA)" <j...@apache.org>
Subject [jira] [Updated] (HDFS-4465) Optimize datanode ReplicasMap and ReplicaInfo
Date Wed, 03 Jul 2013 22:22:20 GMT

     [ https://issues.apache.org/jira/browse/HDFS-4465?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
]

Aaron T. Myers updated HDFS-4465:
---------------------------------

    Attachment: HDFS-4465.patch

Thanks for the review, Suresh. Here's a patch which removes that unnecessary cast.
                
> 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, HDFS-4465.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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