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This is an automatically generated e-mail. To reply, visit:
https://reviews.apache.org/r/39226/
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(Updated Oct. 12, 2015, 11:30 a.m.)
Review request for pig and Rohini Palaniswamy.
Repository: pig-git
Description (updated)
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Pig scripts can have multiple ETL jobs in the DAG which may take hours to
finish. In case of transient errors, the job fails. When the job is rerun, all
the nodes in Job graph will rerun. Some of these nodes may have already run
successfully. Redundant runs lead to wastage of cluster capacity and pipeline
delays.
In case of failure, we can persist the graph state. In next run, only the
failed nodes and their successors will rerun. This is of course subject to
preconditions such as
> Pig script has not changed
> Input locations have not changed
> Output data from previous run is intact
> Configuration has not changed
Diffs
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src/org/apache/pig/PigConfiguration.java 03b36a5
src/org/apache/pig/backend/hadoop/executionengine/mapReduceLayer/MapReduceLauncher.java
595e68c
src/org/apache/pig/backend/hadoop/executionengine/mapReduceLayer/plans/MRIntermediateDataVisitor.java
4b62112
src/org/apache/pig/backend/hadoop/executionengine/mapReduceLayer/plans/MRJobRecovery.java
PRE-CREATION
src/org/apache/pig/backend/hadoop/executionengine/mapReduceLayer/plans/MRJobState.java
PRE-CREATION
src/org/apache/pig/impl/io/FileLocalizer.java f0f9b43
src/org/apache/pig/tools/grunt/GruntParser.java 439d087
src/org/apache/pig/tools/pigstats/ScriptState.java 03a12b1
Diff: https://reviews.apache.org/r/39226/diff/
Testing
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Thanks,
Abhishek Agarwal
