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From "Hudson (JIRA)" <j...@apache.org>
Subject [jira] [Commented] (HDFS-4949) Centralized cache management in HDFS
Date Sat, 25 Jan 2014 12:30:00 GMT

    [ https://issues.apache.org/jira/browse/HDFS-4949?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=13881830#comment-13881830
] 

Hudson commented on HDFS-4949:
------------------------------

FAILURE: Integrated in Hadoop-Yarn-trunk #461 (See [https://builds.apache.org/job/Hadoop-Yarn-trunk/461/])
Move HDFS-4949 subtasks in CHANGES.txt to a new section under 2.4.0 release. (wang: http://svn.apache.org/viewcvs.cgi/?root=Apache-SVN&view=rev&rev=1560528)
* /hadoop/common/trunk/hadoop-hdfs-project/hadoop-hdfs/CHANGES.txt


> Centralized cache management in HDFS
> ------------------------------------
>
>                 Key: HDFS-4949
>                 URL: https://issues.apache.org/jira/browse/HDFS-4949
>             Project: Hadoop HDFS
>          Issue Type: New Feature
>          Components: datanode, namenode
>    Affects Versions: 3.0.0, 2.4.0
>            Reporter: Andrew Wang
>            Assignee: Andrew Wang
>             Fix For: 2.4.0
>
>         Attachments: HDFS-4949-consolidated.patch, caching-design-doc-2013-07-02.pdf,
caching-design-doc-2013-08-09.pdf, caching-design-doc-2013-10-24.pdf, caching-testplan.pdf,
hdfs-4949-branch-2.patch
>
>
> HDFS currently has no support for managing or exposing in-memory caches at datanodes.
This makes it harder for higher level application frameworks like Hive, Pig, and Impala to
effectively use cluster memory, because they cannot explicitly cache important datasets or
place their tasks for memory locality.



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