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From "Hadoop QA (JIRA)" <j...@apache.org>
Subject [jira] [Commented] (HADOOP-7754) Expose file descriptors from Hadoop-wrapped local FileSystems
Date Mon, 06 Aug 2012 14:31:02 GMT

    [ https://issues.apache.org/jira/browse/HADOOP-7754?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=13429161#comment-13429161

Hadoop QA commented on HADOOP-7754:

-1 overall.  Here are the results of testing the latest attachment 
  against trunk revision .

    +1 @author.  The patch does not contain any @author tags.

    -1 tests included.  The patch doesn't appear to include any new or modified tests.
                        Please justify why no new tests are needed for this patch.
                        Also please list what manual steps were performed to verify this patch.

    +1 javac.  The applied patch does not increase the total number of javac compiler warnings.

    +1 javadoc.  The javadoc tool did not generate any warning messages.

    +1 eclipse:eclipse.  The patch built with eclipse:eclipse.

    +1 findbugs.  The patch does not introduce any new Findbugs (version 1.3.9) warnings.

    +1 release audit.  The applied patch does not increase the total number of release audit

    -1 core tests.  The patch failed these unit tests in hadoop-common-project/hadoop-common:


    +1 contrib tests.  The patch passed contrib unit tests.

Test results: https://builds.apache.org/job/PreCommit-HADOOP-Build/1251//testReport/
Console output: https://builds.apache.org/job/PreCommit-HADOOP-Build/1251//console

This message is automatically generated.
> 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
>    Affects Versions: 0.23.0
>            Reporter: Todd Lipcon
>            Assignee: Todd Lipcon
>         Attachments: HADOOP-7754_trunk.patch, hadoop-7754-0.23.0-hasfd.txt, hasfd.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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