With more than 200 million active deployments, Berkeley DB is the most widely deployed open source developer base in the world. Powering everything from Google and Amazon.com down to mobile handsets, Berkeley DB is a high-performance, fault-tolerant database which links directly into an application to provide data persistence. In this presentation, Gregory Burd, Product Manager at Sleepycat Software, presents the Berkeley DB family of products from a developer perspective, explains the very high performance and scalability that Berkeley DB can deliver and looks at the data replication and high-availability functionality that makes Berkeley DB suitable for use in mission-critical applications.