We are happy to announce the availability of Spark 0.9.0! Spark 0.9.0 is a major release and Spark’s largest release ever, with contributions from 83 developers. This release expands Spark’s standard libraries, introducing a new graph computation package (GraphX) and adding several new features to the machine learning and stream-processing packages. It also makes major improvements to the core engine, including external aggregations, a simplified H/A mode for long lived applications, and hardened YARN support.