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https://issues.apache.org/jira/browse/PIG-626?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=12699798#action_12699798
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Shubham Chopra commented on PIG-626:
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Tested the patch with the latest trunk.

> Statistics (records read by each mapper and reducer)
> ----------------------------------------------------
>
>                 Key: PIG-626
>                 URL: https://issues.apache.org/jira/browse/PIG-626
>             Project: Pig
>          Issue Type: New Feature
>          Components: impl
>    Affects Versions: 0.2.0
>            Reporter: Shubham Chopra
>            Priority: Minor
>         Attachments: pigStats.patch, pigStats.patch, pigStats.patch, 
> pigStats.patch, TEST-org.apache.pig.test.TestBZip.txt
>
>
> This uses the counters framework that hadoop has. Initially, I am just 
> interested in finding out the number of records read by each mapper/reducer 
> particularly for the last job in any script. A sample code to access the 
> statistics for the last job:
> String reducePlan = 
> stats.getPigStats().get(stats.getLastJobID()).get("PIG_STATS_REDUCE_PLAN");
>         if(reducePlan == null) {
>             System.out.println("Records written : " + 
> stats.getPigStats().get(stats.getLastJobID()).get("PIG_STATS_MAP_OUTPUT_RECORDS"));
>         } else {
>             System.out.println("Records written : " + 
> stats.getPigStats().get(stats.getLastJobID()).get("PIG_STATS_REDUCE_OUTPUT_RECORDS"));
>         }
> The patch contains 7 test cases. These include tests PigStorage and 
> BinStorage along with one for multiple MR jobs case.

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