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Posted to mapreduce-issues@hadoop.apache.org by "Chris Douglas (JIRA)" <ji...@apache.org> on 2013/06/25 01:10:21 UTC
[jira] [Updated] (MAPREDUCE-5176) Preemptable annotations (to
support preemption in MR)
[ https://issues.apache.org/jira/browse/MAPREDUCE-5176?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel ]
Chris Douglas updated MAPREDUCE-5176:
-------------------------------------
Description:
Proposing a patch that introduces a new annotation @Checkpointable 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])
was:
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])
> 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: 2.1.0-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 @Checkpointable 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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