What is a Data Lake, and how does it help meet the challenges of Big Data? Will the Enterprise Data Warehouse (EDW) and the Data Lake coexist? If so, how? This paper explores what it takes to get started on the journey toward incorporating a Data Lake into an organization’s architecture. At least, that’s been true when we thought of data as finite. But, with the advent of Big Data, it’s pouring in like never before - and while we still want it in any form we can get it, structured or unstructured, the issues of storing, managing, and analyzing it are becoming more complex.