Reducing the I/O system load

The DAB hit rate and the segment size selected or the current prefetching factor are decisive for the extent to which the I/O system workload is reduced. Note that 2 / 4 / 8 / 16 / 32 PAM pages are transferred at a time in the event of segment caching caused by a read miss. This will reduce channel utilization with a good hit rate but increase channel utilization with a poor hit rate.

AutoDAB generally creates a cache behavior with low cache miss rates, resulting in a noticeable reduction of channel loading.