[jira] [Updated] (PIG-3648) Make the sample size for RandomSampleLoader configurable

["Cheolsoo Park (JIRA)" <ji...@apache.org>]

     [ https://issues.apache.org/jira/browse/PIG-3648?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel ]

Cheolsoo Park updated PIG-3648:
-------------------------------

    Status: Patch Available  (was: Open)

Actually, this turned out to be helpful. Since I am not change the default behavior (i.e. the number of sampled rows per task is still set to 100), I think we can commit this to 0.13. Does anyone disagree?

> Make the sample size for RandomSampleLoader configurable
> --------------------------------------------------------
>
>                 Key: PIG-3648
>                 URL: https://issues.apache.org/jira/browse/PIG-3648
>             Project: Pig
>          Issue Type: Improvement
>          Components: impl
>            Reporter: Cheolsoo Park
>            Assignee: Cheolsoo Park
>            Priority: Minor
>             Fix For: 0.13.0
>
>         Attachments: PIG-3648-1.patch
>
>
> Pig uses RandomSampleLoader for range partitioning in order-by. But since the sample size is hardcoded as 100, volatility in the variance of the results  increases when sorting a large number of rows (e.g. 10M+ per task).
> It would be nice if the sample size could be configurable via Pig properties.



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