If you do not know CACHÉ, here are some further information about the database from InterSystems

InterSystems CACHÉ is a post-relational database that uniquely offers three integrated data access options: a robust object database, high performance SQL, and rich multidimensional access. Caché enables rapid Web application development, extraordinary transaction processing speed, massive scalability, and real-time queries against transactional data - with minimal maintenance requirements. Caché is available for Windows, OpenVMS, Mac OS X, Linux and major UNIX platforms and it is deployed on systems ranging from two to over 50,000 simultaneous users.