HP-UX Workload Manager User's Guide

Glossary 517
Glossary
absolute CPU units In WLM
configurations, absolute CPU units are
specified in terms of 100, where 100
represents one core. For example, 50
absolute CPU units represents half of a core;
200 absolute CPU units represents 2 cores.
Absolute CPU units are useful when the
number of active cores changes due to WLM
management of Instant Capacity (iCAP),
Temporary Instant Capacity (TiCAP), Pay
per use (PPU), or virtual partition resources.
Regardless of the number of active cores, the
absolute CPU units represent the same
amount of CPU resources. See also relative
CPU units.
active workload group A workload group
with at least one active SLO.
active SLO An SLO is active under either of
the following situations:
• It has no condition or exception
statements specified
•Its condition statement is true and/or
its exception statement is false,
allowing WLM to try to enforce the SLO
You might set an SLO to be active, for
example, based on time of day or day of week
or whether a Serviceguard package is
running on the local host.
alternate name Other names assigned to
processes spawned by an application. This is
most common for complex programs such as
database programs that launch many
processes and rename them.
alternate group A workload group other
than the user’s initial group that a user can
access using prmrun or prmmove. These
groups are listed in the user records (or their
netgroups’ user records) in the configuration
file following the initial group, as shown in
the following example:
users = user : init_group [alt_group1
alt_group2 ...] [, ...];
application manager A PRM daemon that
polls the configuration and the running
processes to ensure all processes are in the
proper workload groups.
API Application Program Interface. WLM
provides an API so that your data collectors
can send it metrics for your workloads.
ARM Application Response Measurement. A
standard for transaction-based (bounded
events) response-time instrumentation.
controller A control algorithm that
requests new CPU resource allocations for
workload groups.
core The actual data processing engine
within a processor. A single processor might
have multiple cores, and a core might
support multiple execution threads. See
also Hyper-Threading.
CPU manager WLM uses the fair share
scheduler (FSS) to manage CPU resources
for FSS workload groups. (PSET workload
groups are assigned whole cores and do not
require the CPU manager.)