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From "Shubham Chopra (JIRA)" <j...@apache.org>
Subject [jira] Updated: (PIG-626) Statistics (records read by each mapper and reducer)
Date Fri, 08 May 2009 11:39:45 GMT

     [ https://issues.apache.org/jira/browse/PIG-626?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
]

Shubham Chopra updated PIG-626:
-------------------------------

    Attachment: pigStats.patch

Patch compatible with the latest trunk attached.

> 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,
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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