[jira] [Updated] (PIG-2574) Make reducer estimator plugable

["Bill Graham (Updated) (JIRA)" <ji...@apache.org>]

     [ https://issues.apache.org/jira/browse/PIG-2574?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel ]

Bill Graham updated PIG-2574:
-----------------------------

    Attachment: pig-2574_1.patch

Here's a first pass at a patch showing a proposed solution. It adds the following interface and default impl:

{noformat}
o.a.p.backend.hadoop.executionengine.mapReduceLayer.PigReducerEstimator
o.a.p.backend.hadoop.executionengine.mapReduceLayer.InputFileSizeReducerEstimator
{noformat}

along with the following two optional configs to override the default estimator:

{noformat}
pig.exec.reducer.estimator
pig.exec.reducer.estimator.arg
{noformat}

                
> Make reducer estimator plugable
> -------------------------------
>
>                 Key: PIG-2574
>                 URL: https://issues.apache.org/jira/browse/PIG-2574
>             Project: Pig
>          Issue Type: Improvement
>            Reporter: Bill Graham
>            Assignee: Bill Graham
>         Attachments: pig-2574_1.patch
>
>
> I'd like to refactor the logic contained in this method into a pluggable interface:
> {noformat}
> static int JobControlCompiler.estimateNumberOfReducers(Configuration conf, List<POLoad> lds);
> {noformat}

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