The document discusses big data analytics workflows. It defines big data and describes challenges in big data analysis including volume, velocity, variety, and veracity of data. It then discusses cloud computing models and analytic workflow management systems. The key points are: (1) Big data analytics requires scalable hardware and software tools to handle different data types and applications. (2) Analytic workflows consist of sequences of data integration and analysis tasks. (3) Workflow management systems are needed to efficiently define and execute analytic workflows in scientific applications and on distributed cloud resources.