Tässä Hortonworksilta hyviä artikkeleita.
A three part article from Hortonworks showing how Pig can be used with MongoDB, HBase, and Cassandra:
Pig has emerged as the ‘duct tape’ of Big Data, enabling you to send data between distributed systems in a few lines of code. In this series, we’re going to show you how to use Hadoop and Pig to connect different distributed systems, to enable you to process data from wherever and to wherever you like.