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From "Tongjie Chen (JIRA)" <j...@apache.org>
Subject [jira] [Updated] (PIG-3986) PigSplit to support multiple split class
Date Sat, 07 Jun 2014 01:31:04 GMT

     [ https://issues.apache.org/jira/browse/PIG-3986?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel

Tongjie Chen updated PIG-3986:

    Attachment: PIG-3986.patch.txt

> PigSplit to support multiple split class
> ----------------------------------------
>                 Key: PIG-3986
>                 URL: https://issues.apache.org/jira/browse/PIG-3986
>             Project: Pig
>          Issue Type: Improvement
>            Reporter: Tongjie Chen
>            Assignee: Tongjie Chen
>         Attachments: PIG-3986.patch.txt
> Currently one PigSplit wraps one to many input split and pig assign one PigSplit to one
mapper; however when it serializes the split class name, it expects all input split to be
of same class, hence it serializes class name only once --- the first split (see code snippet
at the end).
> To support PigSplit wrap multi split class, we can serialize each split along with its
own class name.    This would allow each split to be deserialized/restored correctly.  Of
course, LoadFunc would need to dispatch input split to appropriate record reader.

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