Consular Consolidated Database

Overview
The Consular Consolidated Database (CCD) is one of the largest data warehouses in the world. It holds current and archived data from the Consular Affairs (CA) domestic and post databases around the world. As of December 2009, it contains over 100 million visa cases and 75 million photographs, utilizing billions of rows of data, and had a current growth rate of approximately 35 thousand visa cases every day. It was created to provide CA a near-real-time aggregate of the consular transaction activity collected domestically and at post databases worldwide. The CCD is the IT implementation that provides for a set of centralized visa and American citizen services supporting consular posts and back-office functions.

Source

 * Department of State Privacy Coordinator, "Consular Consolidated Database (CCD) Privacy Impact Assessment (PIA)" 1 (Mar. 22, 2010) (full-text).