
500 DS8800 Performance Monitoring and Tuning
14.1 Overview
The special synergy between the DS8000 features and the System z operating systems
(mainly the z/OS Operating System) makes the DS8000 an outstanding performer in that
environment.
The following specific DS8000 performance features relate to application I/O in a z/OS
environment:
Parallel Access Volumes (PAVs)
Multiple allegiance
I/O priority queuing
I/O Priority Manager (IOPM)
Logical volume sizes
Fibre Channel connection (FICON)
In the following sections, we describe those DS8000 features and discuss how to best use
them to boost performance.
14.2 Parallel Access Volumes
Parallel ...