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From "Hudson (Commented) (JIRA)" <j...@apache.org>
Subject [jira] [Commented] (HDFS-2653) DFSClient should cache whether addrs are non-local when short-circuiting is enabled
Date Tue, 13 Dec 2011 08:35:32 GMT

    [ https://issues.apache.org/jira/browse/HDFS-2653?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=13168228#comment-13168228
] 

Hudson commented on HDFS-2653:
------------------------------

Integrated in Hadoop-Mapreduce-trunk-Commit #1431 (See [https://builds.apache.org/job/Hadoop-Mapreduce-trunk-Commit/1431/])
    HDFS-2653. DFSClient should cache whether addrs are non-local when short-circuiting is
enabled. Contributed by Eli Collins

eli : http://svn.apache.org/viewcvs.cgi/?root=Apache-SVN&view=rev&rev=1213586
Files : 
* /hadoop/common/trunk/hadoop-hdfs-project/hadoop-hdfs/CHANGES.txt
* /hadoop/common/trunk/hadoop-hdfs-project/hadoop-hdfs/src/main/java/org/apache/hadoop/hdfs/DFSClient.java

                
> DFSClient should cache whether addrs are non-local when short-circuiting is enabled
> -----------------------------------------------------------------------------------
>
>                 Key: HDFS-2653
>                 URL: https://issues.apache.org/jira/browse/HDFS-2653
>             Project: Hadoop HDFS
>          Issue Type: Improvement
>          Components: data-node
>    Affects Versions: 0.23.1, 1.0.0
>            Reporter: Eli Collins
>            Assignee: Eli Collins
>             Fix For: 0.23.1, 1.1.0
>
>         Attachments: hdfs-2653-1.patch, hdfs-2653-2.patch, hdfs-2653-2.patch, hdfs-2653-b1-1.patch,
hdfs-2653-b1-2.patch
>
>
> Something Todd mentioned to me off-line.. currently DFSClient doesn't cache the fact
that non-local reads are non-local, so if short-circuiting is enabled every time we create
a block reader we'll go through the isLocalAddress code path. We should cache the fact that
an addr is non-local as well.

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