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I have a Mapper that is going through lots of data and emitting ID numbers as keys with the value o… Read more How To Get The Reducer To Emit Only Duplicates

we're trying to heavily use MapReduce in our project. Now we have this problem, there is a lot… Read more Appengine Mapreduce Ndb, Deadlineexceedederror

My Mongo collection : Impressions has docs in the following format:- { _uid: 10, … Read more Mapreduce In Pymongo

I'm trying to follow along with this Codelab that shows you how to take data from your Google A… Read more Unicodeencodeerror For Google App Engine Datastore To Bigquery Process

I have worked on Hadoop MR for quite some time and I have created and used custom(extension) Writab… Read more Create Custom Writable Key/value Type In Python For Hadoop Map Reduce?

In my MapReduce jobs, I pass a product name to the Mapper as a string argument. The Mapper.py scrip… Read more Mapreduce How To Allow Mapper To Read An Xml File For Lookup

I've seen the documentatio here, but I confess that I feel it rather lacking. I was wondering … Read more Python UDFs In Pig