Multiplying this by the number of users on your system can give you a reasonably accurate list of hot files. Once identified, hot files can be moved to your fastest disk devices. Both read and write operations can be sped up using this method. 2.4 Host Based Data Caching Host based data caching uses free memory for high-speed data caching. No speed up occurs.
Host based data caching systems are available from a number of commercial software vendors.
As RMS based files are written to, they become internally fragmented and disorganized. 2.6 RMS Buffering RMS moves data from the disk into memory buffers. From the buffers, data is moved into the application program. Whenever the requested data can not be found in a data buffer, RMS must access the disk to find the data. Accessing the disk is much slower than getting information from a data buffer.