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From Ahmed Radwan <a.aboel...@gmail.com>
Subject Re: Old vs new MR API
Date Wed, 26 Feb 2014 21:39:14 GMT
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

On Wed, Feb 26, 2014 at 1:26 PM, Marco Shaw <marco.shaw@gmail.com> wrote:

> Tom White's Hadoop book refers to old vs new MR APIs.
> Is this strictly a MR1 vs MR2 (YARN) comparison, or something before MR2?


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