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From "Hudson (JIRA)" <j...@apache.org>
Subject [jira] [Commented] (MAPREDUCE-5176) Preemptable annotations (to support preemption in MR)
Date Fri, 31 May 2013 14:09:23 GMT

    [ https://issues.apache.org/jira/browse/MAPREDUCE-5176?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=13671490#comment-13671490
] 

Hudson commented on MAPREDUCE-5176:
-----------------------------------

Integrated in Hadoop-Mapreduce-trunk #1442 (See [https://builds.apache.org/job/Hadoop-Mapreduce-trunk/1442/])
    MAPREDUCE-5176. Add annotation for tagging tasks as responsive to
preemption. Contributed by Carlo Curino, cdouglas (Revision 1488103)

     Result = SUCCESS
cdouglas : http://svn.apache.org/viewcvs.cgi/?root=Apache-SVN&view=rev&rev=1488103
Files : 
* /hadoop/common/trunk/hadoop-mapreduce-project/CHANGES.txt
* /hadoop/common/trunk/hadoop-mapreduce-project/hadoop-mapreduce-client/hadoop-mapreduce-client-core/src/main/java/org/apache/hadoop/mapreduce/Reducer.java
* /hadoop/common/trunk/hadoop-mapreduce-project/hadoop-mapreduce-client/hadoop-mapreduce-client-core/src/main/java/org/apache/hadoop/mapreduce/lib/output/FileOutputCommitter.java
* /hadoop/common/trunk/hadoop-mapreduce-project/hadoop-mapreduce-client/hadoop-mapreduce-client-core/src/main/java/org/apache/hadoop/mapreduce/lib/output/PartialFileOutputCommitter.java
* /hadoop/common/trunk/hadoop-mapreduce-project/hadoop-mapreduce-client/hadoop-mapreduce-client-core/src/main/java/org/apache/hadoop/mapreduce/lib/output/PartialOutputCommitter.java
* /hadoop/common/trunk/hadoop-mapreduce-project/hadoop-mapreduce-client/hadoop-mapreduce-client-core/src/main/java/org/apache/hadoop/mapreduce/task/annotation
* /hadoop/common/trunk/hadoop-mapreduce-project/hadoop-mapreduce-client/hadoop-mapreduce-client-core/src/main/java/org/apache/hadoop/mapreduce/task/annotation/Checkpointable.java
* /hadoop/common/trunk/hadoop-mapreduce-project/hadoop-mapreduce-client/hadoop-mapreduce-client-core/src/test/java/org/apache/hadoop/mapreduce/lib/output/TestPreemptableFileOutputCommitter.java

                
> Preemptable annotations (to support preemption in MR)
> -----------------------------------------------------
>
>                 Key: MAPREDUCE-5176
>                 URL: https://issues.apache.org/jira/browse/MAPREDUCE-5176
>             Project: Hadoop Map/Reduce
>          Issue Type: Improvement
>          Components: mrv2
>            Reporter: Carlo Curino
>            Assignee: Carlo Curino
>             Fix For: 2.0.5-beta
>
>         Attachments: MAPREDUCE-5176.1.patch, MAPREDUCE-5176.2.patch, MAPREDUCE-5176.3.patch,
MAPREDUCE-5176.patch
>
>
> Proposing a patch that introduces a new annotation @Preemptable that represents to the
framework property of user-supplied classes (e.g., Reducer, OutputCommiter). The intended
semantics is that a tagged class is safe to be preempted between invocations. 
> (this is in spirit similar to the Output Contracts of [Nephele/PACT | https://stratosphere.eu/sites/default/files/papers/ComparingMapReduceAndPACTs_11.pdf])

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