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From "Julien Le Dem (Created) (JIRA)" <j...@apache.org>
Subject [jira] [Created] (PIG-2318) Push extra jars to distributed cache and use the classloader enxtension mechanism in PigContext to load them on the backend
Date Thu, 13 Oct 2011 18:49:11 GMT
Push extra jars to distributed cache and use the classloader enxtension mechanism in PigContext
to load them on the backend
---------------------------------------------------------------------------------------------------------------------------

                 Key: PIG-2318
                 URL: https://issues.apache.org/jira/browse/PIG-2318
             Project: Pig
          Issue Type: Improvement
          Components: impl
            Reporter: Julien Le Dem
            Assignee: Julien Le Dem


This is related to PIG-2010 with a slightly different approach
https://issues.apache.org/jira/browse/PIG-2010
Currently Pig bundles up all dependencies in a single jar which is a lot of overhead when
there are a lot of dependencies and short lived jobs. This patch instead pushes the dependencies
to distributed cache and uses the PigContext classloading mechanism to make the UDFs available.

Possible improvements: push jars to HDFS/distributed cache only once per script. have a cache
on HDFS to avoid repeatedly pushing jars to HDFS.

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