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https://issues.apache.org/jira/browse/PIG-94?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=12580569#action_12580569
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Arun C Murthy commented on PIG-94:
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bq. You're talking about synchronous and asynchronous mode right?

No, even in synchronous mode we've seen Hadoop Streaming applications which 
wait for all input (or a large subset of input) to arrive before starting 
computation... hence in those cases outputBytes is not a good candidate for 
measuring progress. Sorry, I should have clarified it better.

> Pig Streaming functional spec proposal
> --------------------------------------
>
>                 Key: PIG-94
>                 URL: https://issues.apache.org/jira/browse/PIG-94
>             Project: Pig
>          Issue Type: New Feature
>            Reporter: Olga Natkovich
>            Assignee: Arun C Murthy
>         Attachments: patch.txt, PIG-94_1_1_20080304.patch, 
> PIG-94_1_20080303.patch, PIG-94_2_0_20080317.patch, PigStreamingTestPlan.htm
>
>
> This issue is for discussion about Pig streaming functional spec.
> http://wiki.apache.org/pig/PigStreamingFunctionalSpec

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