HP-UX Workload Manager A.03.01 Release Notes for HP-UX 11i v1 and HP-UX 11i v2

HP-UX Workload Manager Release Notes

What’s in this version

For more information, refer to the wlmcert(1M), wlmd(1M), wlmpard(1M), and

wlmcomd(1M) manpages and the /etc/rc.config.d/wlm file.

• WLM now supports finer granularity for minimum allocations to FSS groups.

The extended_shares tunable (supported on both HP-UX 11i v1 and HP-UX 11i v2

systems) enables finer granularity for allocations to FSS groups, decreasing minimum

allocations from 1% to 0.2%.

• WLM now supports a maximum of 256 FSS groups (instead of 64).

Such support is available starting with HP-UX 11i v2 Update 2 (you must have the latest

system patches). Support for this greater number of groups also requires that you enable

the new extended_shares tunable and that you use absolute CPU units.

• WLM supports placement of processes using your own criteria.

WLM already offers you several methods for putting applications under its control. For

example, you can change the workload group in which a particular user’s processes run by

adding user records to the WLM configuration file. You can specify the workload groups in

which processes run by adding application records to your WLM configuration or by

defining secure compartments that isolate the processes in specified workload groups.

Beginning with WLM A.03.01, you can define process maps that include your own criteria

for the placement of processes in workload groups. Using the procmap statement in the

prm structure, you establish your criteria by specifying a particular workload group plus a

script or command and its arguments that gathers and outputs PIDs of processes to be

placed in that group. WLM spawns the command or script periodically at 30-second

intervals. At each interval, WLM places the identified processes in the specified group.

If application, user, or compartment records are also specified in the prm structure, the

process placement specified by a process map has precedence over the placement specified

by the other records. In other words, if a PID gathered by the process map matches an

application, user, or compartment record, the process map determines the placement of

the identified process.

• WLM now provides the HP-UX WLM SAP Toolkit (SAPTK).

This toolkit is part of the freely available WLM Toolkits, or WLMTK. The WLM SAP

Toolkit provides a script (called wlmsapmap) that identifies SAP

processes based on

user-defined criteria and uses WLM’s process maps feature to place the SAP processes in

specific workload groups managed by WLM. For more information, refer to the HP-UX

Workload Manager Toolkits User’s Guide (opt/wlm/toolkits/doc/WLMTKug.pdf) and the

wlmsapmap(1M) manpage.

• WLM now supports management of PSET-based workload groups in configurations that

also simultaneously manage partitions (virtual partitions or nPartitions).