Amazon Elastic MapReduce (Amazon EMR) supports Apache Pig, a programming framework you can use to analyze and transform large data sets. For more information about Pig, go to http://pig.apache.org/. Amazon EMR supports several versions of Pig.
Pig is an open-source, Apache library that runs on top of Hadoop. The library takes SQL-like commands written in a language called Pig Latin and converts those commands into MapReduce jobs. You do not have to write complex MapReduce code using a lower level computer language, such as Java.
You can execute Pig commands interactively or in batch mode. To use Pig interactively, create an SSH connection to the master node and submit commands using the Grunt shell. To use Pig in batch mode, write your Pig scripts, upload them to Amazon S3, and submit them as cluster steps. For more information on submitting work to a cluster, see Submit Work to a Cluster.