Hi, The major differences are in s3 file system that has been rewritten in EMR and in Hadoop interactions with S3. Other differences are in detecting various failure conditions.
Outside these it's Apache Hadoop. Here is a list of patches EMR applied on top of 1.0.3 Hadoop http://docs.amazonwebservices.com/ElasticMapReduce/latest/DeveloperGuide/EnvironmentConfig_AMIHadoopPatches.html Regards, Peter On Sep 9, 2012, at 11:29 AM, "Momina Khan" <momina.a...@gmail.com> wrote: > hi all! > > could someone please point out key differences between hadoop code and > Amazon's Elastic MapReduce. I am particularly interested in ways that > hadoop code is changed/optimized to run on efficiently EC2. > > cheers! > momina
