This document discusses big data appliances and analytics on the cloud. It notes that big data refers to extremely large data sets that are difficult to manage and analyze using traditional databases and tools. Big data sizes range from dozens of terabytes to petabytes. The document outlines how cloud analytics can process vast amounts of data cost effectively and integrate cross-platform data to provide insights. It also discusses trends in data warehousing appliances, including a shift toward software over hardware and mixed workloads. The challenges of analyzing growing and diverse data sources are summarized.