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From "Josh Wills (JIRA)" <j...@apache.org>
Subject [jira] [Created] (CRUNCH-269) Allow clients to disable deep copies on intermediate DoFn outputs
Date Fri, 20 Sep 2013 23:35:52 GMT
Josh Wills created CRUNCH-269:
---------------------------------

             Summary: Allow clients to disable deep copies on intermediate DoFn outputs
                 Key: CRUNCH-269
                 URL: https://issues.apache.org/jira/browse/CRUNCH-269
             Project: Crunch
          Issue Type: Bug
          Components: Core
    Affects Versions: 0.7.0
            Reporter: Josh Wills
            Assignee: Josh Wills


I have a pipeline that operates on some large objects, and the additional overhead of creating
a deep copy of them on intermediate outputs (i.e., DoFns w/more than one child operation)
when I know that all of their consumers are going to be read-only is slowing down my runtime
quite a bit. I'd like to have an option that would allow me to disable intermediate deep copies
on a DoFn-by-DoFn basis and/or across an entire pipeline run when I know that it's safe to
do.

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