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From "Hadoop QA (JIRA)" <j...@apache.org>
Subject [jira] [Commented] (HDFS-4465) Optimize datanode ReplicasMap and ReplicaInfo
Date Wed, 03 Jul 2013 03:50:21 GMT

    [ https://issues.apache.org/jira/browse/HDFS-4465?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=13698543#comment-13698543
] 

Hadoop QA commented on HDFS-4465:
---------------------------------

{color:green}+1 overall{color}.  Here are the results of testing the latest attachment 
  http://issues.apache.org/jira/secure/attachment/12590557/HDFS-4465.patch
  against trunk revision .

    {color:green}+1 @author{color}.  The patch does not contain any @author tags.

    {color:green}+1 tests included{color}.  The patch appears to include 1 new or modified
test files.

    {color:green}+1 javac{color}.  The applied patch does not increase the total number of
javac compiler warnings.

    {color:green}+1 javadoc{color}.  The javadoc tool did not generate any warning messages.

    {color:green}+1 eclipse:eclipse{color}.  The patch built with eclipse:eclipse.

    {color:green}+1 findbugs{color}.  The patch does not introduce any new Findbugs (version
1.3.9) warnings.

    {color:green}+1 release audit{color}.  The applied patch does not increase the total number
of release audit warnings.

    {color:green}+1 core tests{color}.  The patch passed unit tests in hadoop-hdfs-project/hadoop-hdfs.

    {color:green}+1 contrib tests{color}.  The patch passed contrib unit tests.

Test results: https://builds.apache.org/job/PreCommit-HDFS-Build/4591//testReport/
Console output: https://builds.apache.org/job/PreCommit-HDFS-Build/4591//console

This message is automatically generated.
                
> 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
>
>
> 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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