IBM Balanced Configuration Unit
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The IBM Data Warehousing Balanced Configuration Unit is a family of data warehousing servers from IBM. IBM introduced the Balanced Configuration Unit (BCU) for AIX in 2005, and the BCU for Linux in 2006. The BCU is a "balanced" combination of computer server hardware (cpus, I/O channels, and storage) combined with DB2 Data Warehouse Edition (DB2 DWE) software to form a data warehouse "appliance like" system to compete with systems such as Netezza Performance Server, DATAllegro, and Teradata. Oracle 10G RAC is sometimes confused with but is not an "appliance" since Oracle does not specify or certify suitable hardware for running 10G.
See also IBM Linux Solution Optimizes Enterprise Data Warehousing.