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https://issues.apache.org/jira/browse/PIG-120?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=12573654#action_12573654
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Pi Song commented on PIG-120:
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+1 with the concept. Allowing Hadoop local execution mode will be very
beneficial for testing with a subset of data before going into production.
Theoretically outputs from Pig local and Hadoop Mapreduce should be exactly the
same but sometimes I found that they are different. In such case, I would trust
local hadoop more than Pig local for my development.
So, from the patch, if I want to run local hadoop Pig, I just have to set
cluster and nameNode properties to "local" right?
> 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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