DB2 OLAP Server offers a multidimensional storage manager (MDSM) for applications in which performance is the critical requirement. In the Hyperion documentation, this is also called the storage manager, or the Essbase kernel.
The multidimensional data storage manager and the relational storage manager can coexist in the same installation of DB2 OLAP Server. For example, using Application Partitioning, you can distribute data across both relational and multidimensional data stores.