
652 DS8800 Performance Monitoring and Tuning
Considering hardware resources for throughput
An important factor in logically configuring your DS8000 for optimal performance throughput
is to assess your hardware resource availability. An adequate sizing, which is based on your
current workloads and workload increase predictions, assisted by the IBM functions and by
using the Disk Magic tool, is key. Take inventory of the amount of cache, number of device
adapter (DA) pairs, ranks (arrays and array sites of the various tiers), their affinity to a specific
server complex, the number of I/O enclosures, the number of host adapters (HAs), and the