Until now, design patterns for the MapReduceframework have been scattered among various research papers, blogs, and books.This handy guide brings together a unique collection of valuable MapReducepatterns that will save you time and effort regardless of the domain, language,or development framework you’re using.

Eachpattern is explained in context, with pitfalls and caveats clearly identifiedto help you avoid common design mistakes when modeling your big dataarchitecture. This book also provides a complete overview of MapReduce thatexplains its origins and implementations, and why design patterns are soimportant.

Allcode examples are written for Hadoop.
•Summarization patterns: get a top-level view by summarizing and grouping data
•Filtering patterns: view data subsets such as records generated from one user
•Data organization patterns: reorganize data to work with other systems, or to make MapReduce analysis easier
•Join patterns: analyze different datasets together to discover interesting relationships
•Metapatterns: piece together several patterns to solve multi-stage problems, or to perform several analytics in the same job
•Input and output patterns: customize the way you use Hadoop to load or store data