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From "Stefan Groschupf (JIRA)" <j...@apache.org>
Subject [jira] Commented: (PIG-120) support hadoop map reduce in loal mode
Date Sun, 02 Mar 2008 00:36:51 GMT

    [ https://issues.apache.org/jira/browse/PIG-120?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=12574168#action_12574168
] 

Stefan Groschupf commented on PIG-120:
--------------------------------------

yeah just set the cluster name to local. 
This patch is a beginning - i would love to more explizit support that in the future. 
A related proplem for example is that we can not define a jobtracker and namenode on different
host by today. 

The configuration patch will solve some basic problems here - please vote it for better hadoop
local mode support in the future. :)



> 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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