Communications Storage Manager (CSM)

The Communications Storage Manager (CSM) is a component of VTAM that allows authorized host applications to share data with VTAM and other CSM users without having to physically copy the data. CSM is provided as part of the HPDT family of services. HPDT optimizes system performance for the transfer of bulk data. By providing a means for authorized applications to share buffers, CSM improves system performance during the transfer of bulk data by reducing the processing required for data movement. As a result, CPU resources (CPU cycles, memory bus, and cache) are conserved.

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