Expanded Storage Management with MVS/ESA.
Donald R. Deese · 1993
Expanded storage is offered as a relatively inexpensive way of using high speed processor storage to minimize I/O operations. Under many circumstances, expanded storage achieves this objective. In some situations, the expanded storage algorithms may not yield the expected benefits. In a few situations, expanded storage can cause severe performance problems. This paper describes the concepts and algorithms used to manage expanded storage with MVS/ESA and highlights major changes between MVS/XA and different releases of MVS/ESA. 1.0 INTRODUCTION • Migration Age is a single number which is used as an This introduction provides a brief overview of the terms and concepts used by the System Resources Manager (SRM), the Real Storage Manager (RSM), and the Auxiliary Storage Manager (ASM) to manage the use of Programs and data may reside in central storage,