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From "Stefan Groschupf (JIRA)" <j...@apache.org>
Subject [jira] Updated: (PIG-120) support hadoop map reduce in loal mode
Date Mon, 25 Feb 2008 05:20:51 GMT

     [ https://issues.apache.org/jira/browse/PIG-120?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
]

Stefan Groschupf updated PIG-120:
---------------------------------

    Attachment: PIG-120_v_1.patch

A patch that allows to run pig in mapreduce mode but uses the hadoop localjobrunner. This
is for sure not the most elegant solution but a starting point. As mentioned in PIG-121 I
guess HExecutionEngine and Co need a cleanup anyhow.
This patch would be very useful for phase 1 of pig-119. It would be great if we can get this
into trunk as a starting, since I guess PIG-121 will require some more discussion and work.



> support hadoop map reduce in loal mode
> --------------------------------------
>
>                 Key: PIG-120
>                 URL: https://issues.apache.org/jira/browse/PIG-120
>             Project: Pig
>          Issue Type: Bug
>            Reporter: Stefan Groschupf
>         Attachments: PIG-120_v_1.patch
>
>
> Currently pig support mapreduce and local as execution modes. LocalExecutionEngine is
used for local and HExecutionEngine for map reduce. HExecutionEngine always expect that hadoop
runs as cluster with a name node and jobtracker listing on a port. 
> Though, hadoop can also run in a local mode (LocalJobRunner) this would give several
advantages. 
> First it would speed up the test suite significant. Second it would be possible to debug
map reduce plans easily.
> For example we was able to debug and reproduce PIG-110 with this method.

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