The Communications Storage Manager (CSM) facility is used by authorized
programs to manage subsystem storage pools. CSM reduces data moves
by providing a flat storage model that is accessible at multiple layers
of the process model and across MVS™ address
space boundaries. In addition, CSM provides the following technical
advantages:
- MVS cellpool-like services
- Automatic handling of the contraction and expansion of storage
resources
- Handling of different types and sizes of storage requests (for
example, pageable and fixed)