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DFSMS (Data Facility Storage Management Subsystem) can be used to manage DB2 data sets automatically and to reduce the amount of administrative work for database and systems administrators. SMS facilitates allocation and movement of data, better availability and performance management, and automated space management. Most important is the aspect of performance improvements, as performance goals can be set for each class of data, thereby reducing the need for manual tuning. This environment also uses the cache provided by the storage hardware.

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