Allows partitioning of all resources of a single (hardware) System into up to 15 parts (Logical Partitions):
CPU, Storage, I/O-channels, DASD (disks)
Similar to VM/ESA CP-component (Control Program), but not 'visible' as software; integrated as part of hardware system.
'Hypervisor', controlling and managing the partitions.
Allows for concurrent usage of different operating systems.
Preferred usage in large systems:
To strictly isolate mixed applications/workloads from each other
(e.g., production / test / development)
To enable 'smooth’ software migrations (release to release ...)
Slide Courtesy of IBM Corporation