It’s tough to argue with R as a high-quality, cross-platform, open source statistical software product—unless you’re in the business of crunching Big Data. This concise book introduces you to several strategies for using R to analyze large datasets. You’ll learn the basics of Snow, Multicore, Parallel, and some Hadoop-related tools, including how to find them, how to use them, when they work well, and when they don’t. With these packages, you can overcome R’s single-threaded nature by spreading work across multiple CPUs, or offloading work to multiple machines to address R’s memory barrier. works well in a traditional cluster environment popular for multiprocessor and multicore computers part of the upcoming R 2.14.0 release provides low-level access to a popular form of cluster computing uses Hadoop’s power with R’s language and interactive shell lets you use Elastic MapReduce as a backend for lapply-style operations
A good big picture of parallel R by introducing multiple packages for parallel and distributed computing, including snow, multicore, parallel and a little about R+Hadoop, RHIPE etc. However, it's just a big picture. Besides, it's more like a simple how-to manual, and lack of details.