The USA Patriot Act is a law enacted in 2001, granting new and extended data-collection abilities to federal agencies in an effort to combat terrorism after the September 11 attacks.
A virtual cube is a subset of one or two existing cubes in a database. Database administrators create virtual cubes for security purposes and/or to enable analysis of the shared data.
VoltDB is an in-memory database. The software is available in an open-source community edition and in a commercial release from vendor VoltDB Inc.