Old vs new MR APIs refers to changes from org.apache.hadoop.mapred to org.apache.hadoop.mapreduce packages which are changes in how you construct your job, mappers, reducers, etc.
This is not related to Yarn/MR2 which generally refers to new Hadoop 2 design where there is separation between resource management (handled by yarn) and application life cycle management (handled by application master). Just google yarn and you'll find a lot of docs and blog posts describing these details.
Best Regards Ahmed On Wed, Feb 26, 2014 at 1:26 PM, Marco Shaw <[EMAIL PROTECTED]> wrote: Ahmed
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