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From "Hudson (JIRA)" <j...@apache.org>
Subject [jira] [Commented] (HADOOP-7754) Expose file descriptors from Hadoop-wrapped local FileSystems
Date Wed, 15 Aug 2012 13:01:40 GMT

    [ https://issues.apache.org/jira/browse/HADOOP-7754?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=13435058#comment-13435058
] 

Hudson commented on HADOOP-7754:
--------------------------------

Integrated in Hadoop-Hdfs-trunk #1135 (See [https://builds.apache.org/job/Hadoop-Hdfs-trunk/1135/])
    HADOOP-7754. Expose file descriptors from Hadoop-wrapped local FileSystems (todd and ahmed
via tucu) (Revision 1373235)

     Result = FAILURE
tucu : http://svn.apache.org/viewcvs.cgi/?root=Apache-SVN&view=rev&rev=1373235
Files : 
* /hadoop/common/trunk/hadoop-common-project/hadoop-common/CHANGES.txt
* /hadoop/common/trunk/hadoop-common-project/hadoop-common/src/main/java/org/apache/hadoop/fs/BufferedFSInputStream.java
* /hadoop/common/trunk/hadoop-common-project/hadoop-common/src/main/java/org/apache/hadoop/fs/FSDataInputStream.java
* /hadoop/common/trunk/hadoop-common-project/hadoop-common/src/main/java/org/apache/hadoop/fs/HasFileDescriptor.java
* /hadoop/common/trunk/hadoop-common-project/hadoop-common/src/main/java/org/apache/hadoop/fs/RawLocalFileSystem.java
* /hadoop/common/trunk/hadoop-common-project/hadoop-common/src/test/java/org/apache/hadoop/fs/TestLocalFileSystem.java

                
> Expose file descriptors from Hadoop-wrapped local FileSystems
> -------------------------------------------------------------
>
>                 Key: HADOOP-7754
>                 URL: https://issues.apache.org/jira/browse/HADOOP-7754
>             Project: Hadoop Common
>          Issue Type: Sub-task
>          Components: native, performance
>    Affects Versions: 0.23.0
>            Reporter: Todd Lipcon
>            Assignee: Todd Lipcon
>             Fix For: 1.2.0, 2.2.0-alpha
>
>         Attachments: hadoop-7754-0.23.0-hasfd.txt, HADOOP-7754_branch-1_rev2.patch, HADOOP-7754_branch-1_rev3.patch,
HADOOP-7754_branch-1_rev4.patch, HADOOP-7754_trunk.patch, HADOOP-7754_trunk_rev2.patch, HADOOP-7754_trunk_rev2.patch,
HADOOP-7754_trunk_rev3.patch, HADOOP-7754_trunk_rev4.patch, HADOOP-7754_trunk_rev4.patch,
HADOOP-7754_trunk_rev4.patch, hasfd.txt, test-patch-hadoop-7754.txt
>
>
> In HADOOP-7714, we determined that using fadvise inside of the MapReduce shuffle can
yield very good performance improvements. But many parts of the shuffle are FileSystem-agnostic
and thus operate on FSDataInputStreams and RawLocalFileSystems. This JIRA is to figure out
how to allow RawLocalFileSystem to expose its FileDescriptor object without unnecessarily
polluting the public APIs.

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