This document discusses EMC's Isilon scale-out NAS architecture and how it can be used as the data lake foundation for analytics workloads like Hadoop. It provides an overview of how Isilon implements the HDFS protocol to allow analytics jobs to run directly against data stored in the Isilon cluster. It also highlights the performance benefits of using shared storage on Isilon versus local disks, including up to 4x faster ingest and 1.5x faster job runtimes. Finally, it discusses how Isilon supports features like data tiering, multi-tier architectures with different node types, and integration with object storage for archiving.