130 DS8800 Performance Monitoring and Tuning
4.8.6 Balancing workload across available resources
To achieve a balanced utilization of all available resources of the DS8000 storage system, you
need to distribute the I/O workloads evenly across the available back-end resources:
Ranks (disk drive modules)
DA pairs
And, you need to distribute the I/O workloads evenly across the available front-end resources:
I/O ports
HA cards
I/O enclosures
You need to distribute the I/O workloads evenly across both DS8000 processor complexes
(also called storage server 0/CEC#0 and storage server 1/CEC#1), as well.
Configuring the extent pools determines the balance of the workloads across the available
back-end resources, ranks, DA pairs, and both processor ...