2. Apache Pig

Pig is a platform for analyzing large data sets that consists of a high-level language for express­ing data analysis programs, coupled with infrastructure for evaluating these programs. The salient property of Pig programs is that their structure is amenable to substantial parallelization, which in turns enables them to handle very large data sets. At the present time,

Pig's infrastructure layer consists of a compiler that produces sequences of Map-Reduce programs. Pig's language layer currently consists of a textual language called Pig Latin, which is easy to use, optimized, and extensible.