HP StorageWorks XP Remote Web Console Software - Manual (Page 21)

Setting the WLM Operation Mode
WLM manages workloads on MVS and z/OS systems and has two operation modes for static
and dynamic Compatible PAV:
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Goal mode: To use dynamic Compatible PAV, you must set the WLM operation mode to goal
mode. In goal mode, WLM can assign more or fewer aliases to a base device depending on
the host I/O activity to that device, thereby managing the system to meet the performance
goal specified before system operations began.
•
Compatibility mode: To use static Compatible PAV, you must set the WLM operation mode
to compatibility mode. In compatibility mode, the number of aliases assigned to each base
device does not change as a result of changes in host I/O activity. WLM manages the system
according to the parameters in the IPS and ICS (IEAIPSxx, IEAICSxx).
For further information on WLM operation modes, see IBM document GC28-1761, OS/390 MVS
Planning: Workload Management.
When you use Compatible Hyper PAV, you do not need to set the WLM operation modes.
Changing the Hyper PAV Setting
To use Compatible Hyper PAV, you have to enable Hyper PAV on the host computer. The procedure
on enabling Hyper PAV depends on whether Compatible Hyper PAV is used from z/OS or from
z/OS used as a guest OS on z/VM. This section describes each procedure.
This section uses the following symbols and typefaces to explain each command operation:
•
Italics
Indicates a type of an input value. You can type the arbitrary value.
•
– (hyphen)
Specifies the range to enable the settings (for example, 8101-81FF).
For details about the OS commands, see the document about z/OS and z/VM. If you specify mini
disk DASD on z/VM, ask your HP representative in advance.
•
Using Compatible Hyper PAV from z/OS
To enable Hyper PAV, issue the following command from the system console of host computer:
SETIOS HYPERPAV=YES
You can define SETIOS command to each LPAR (Logical Partitioning).
Figure 5 (page 21) shows the setting result of enabling Compatible Hyper PAV.
Figure 5 Setting Result (Enabling Hyper PAV on z/OS)
SETIOS HYPERPAV=YES
IOS189I HYPERPAV MODE CHANGE INITIATED - CONTROL UNIT CONVERSION WILL
COMPLETE ASYNCHRONOUSLY
To disable Hyper PAV, enter SETIOS HYPERPAV=NO.
•
Using Compatible Hyper PAV from z/OS used as the guest OS on z/VM
You have to enable Hyper PAV on z/VM first, and then also on z/OS.
To enable Hyper PAV:
1. Make the base devices offline. Issue the following command from the system console of
z/OS that is used as a guest OS on z/VM to all base devices in the corresponding CU:
V base-device-number1 - base-device-number2,OFFLINE
Preparing the Host System for Compatible PAV Operations 21