Optimizing buffer size for disk I/O performance

Adjust buffer size disk I/O to improve transfer rates.

The internal data buffer size can be adjusted for Data Protection for SAP. These buffers are used for reading the disk and sending data to the IBM Storage Protect™ client API. The default values typically produce acceptable performance.

Optimize the buffer size for disk I/O to improve transfer rates. For disk subsystems, the best transfer rates are achieved when the buffer size is set equal to the stripe size. Before you increase the size of internal buffers, however, ensure that sufficient storage is available for the number of buffers that are specified by Data Protection for SAP. This number correlates to the number of sessions requested. The number of buffers doubles when compression is specified.