For analysts and data scientists who rely on iterative algorithms (e.g. clustering/classification), Spark is 10-100x faster than MapReduce delivering faster time to insight on more data, resulting in better business decisions and user outcomes. Spark Streaming extends Spark with an API for working with streams, providing exactly-once semantics and full fault tolerance for mission-critical environments. With common code across your batch and streaming applications, you can build sophisticated unified analytic applications quickly and easily.