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From "Olga Natkovich (JIRA)" <j...@apache.org>
Subject [jira] Commented: (PIG-1143) Poisson Sample Loader should compute the number of samples required only once
Date Mon, 21 Dec 2009 19:55:18 GMT

    [ https://issues.apache.org/jira/browse/PIG-1143?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=12793322#action_12793322
] 

Olga Natkovich commented on PIG-1143:
-------------------------------------

patch committed to the trunk. Will commit to 0.6 branch tomorrow.

> Poisson Sample Loader should compute the number of samples required only once
> -----------------------------------------------------------------------------
>
>                 Key: PIG-1143
>                 URL: https://issues.apache.org/jira/browse/PIG-1143
>             Project: Pig
>          Issue Type: Bug
>            Reporter: Sriranjan Manjunath
>            Assignee: Sriranjan Manjunath
>             Fix For: 0.6.0
>
>         Attachments: PIG_1143.patch, PIG_1143.patch.1
>
>
> The current poisson sampler forces each of the maps to compute the sample number. This
is redundant and causes issues when a large directory is specified in the join. The sampler
should be changed to calculate the sample count only once and this information should be shared
with the remaining mappers.

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