Carlo Curino created MAPREDUCE-5176:
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Summary: 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
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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