I'm familiar with Python and its data structures. Can someone give me a very basic example on how to use Hadoop Mapreduce?

Question

What can I do with Mapreduce? Dictionaries? Lists? What do I use it for? Give a real easy example

Answer 1

The classic example is counting the occurrence of words in a very large collection of documents. You can use the map step to generate a set of word counts for every document in parallel, then use the reduce step to collate all the words found in each document to a global count.

Here is a link to the documentation page you were probably looking for: http://hadoop.apache.org/common/docs/current/mapred_tutorial.html