IBM 170 Servers Manual page 327

· Inactive switchover - The switching time is measured from the point at which the CHGCRGPRI
command is issued from the primary system which has no work until the IASP is available on the
new primary system.
· Partition - An active partition is created by starting the database workload on the IASP. Once the
workload is stabilized an option 22(force MSD) is issued on the panel. Switching time is
measured from the time the MSD is forced on the primary side until new primary node varies on
the IASP.
Workload Configuration
The wide variety of hardware configurations and software environments available make it
difficult to characterize a 'typical' high availability environment. The following section
provides a simple description of the high availability test environment used in our lab.
System Configuration
Hardware Configuration
System A
Model
Feature code
Interactive Code
Processor
CPW
# of Arms in
System ASP
Speed of Dasd
Type of IOA's
Size of Dasd
Memory
# of Arms
Speed of Dasd
Type of IOA's
Size of Dasd
IBM i 6.1 Performance Capabilities Reference - January/April/October 2008
©
Copyright IBM Corp. 2008
System B
870 870
7421 7421
7421 7421
2486 2486
22000 22000
50 50
15k 15k
2757 2757
35 Gig 35 Gig
64Gig 64 Gig
iASP
180
15k
2757
35 Gig
Chapter 21 High Availability Performance
Cabling Map
System ASP
System ASP
HSL Line
870 Cluster HSL Cabling Map
iASP
327