IBM DB2 is a relational model database server established by IBM. There are three main products in the DB2 family: DB2 for LUW , DB2 for z/OS , and DB2 for iSeries (formerly OS/400). The DB2 LUW product executes on multiple Linux and UNIX supplies, such as Red Hat Linux, SUSE Linux, AIX, HP/UX, and Solaris, and most Windows systems. DB2 also controls the IBM InfoSphere Warehouse – edition, which is essentially DB2 LUW with DPF (Database Partitioning Feature), a enormous similar share-nothing data warehousing architecture. Another RDBMS, Informix, was acquired by IBM in 2001.