Cache Magic

SDI's Cache Magic is a software implementation of the DASD caching concept and is available to all software running under VM, regardless of the operating system or release level.

Cache Magic automatically creates in-memory cache storage for frequently used DASD files. Because the data is in processor storage, access is instantaneous. I/O activity can be eliminated completely, even between CPU and DASD control unit.

As with a cache DASD controller, Cache Magic maintains the most active data in a buffer, thereby avoiding the need to read it from the disk. Requests to write data are reflected immediately to the disk, thereby maintaining absolute data integrity at all times.

The performance improvement of disk-bound applications can be dramatic. Because DASD I/O is at CPU speed, it approaches that of solid-state devices, but without the risk of data loss if a power failure occurs or the need to transfer data files from other devices.

Furthermore, Cache Magic is totally transparent, and data is presented to applications exactly as it was previously. Installation typically takes less than 30 minutes, and, once installed, the full benefits of the product can be obtained without any changes to applications, movement of disk files, or installation of new VM releases.

While Cache Magic is designed to automatically determine the most suitable DASD areas for caching, it also permits manual caching of individual cache areas, providing users with maximum control of their data. Various configuration options are provided to allow a very high degree of fine tuning. Individual applications or files may be cached as desired.

The performance gains can be astonishing!