Hp Matrix Operating Environment Software User Manual Page 10

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gWLM monitors the CPU resource consumption of all the workloads in the SRD during
the current allocation interval.
a.
b. At the end of the interval, gWLM adjusts the CPU resource allocations for the compartments
in accordance with the policies. It also makes the allocation data available for real-time
and historical reports.
c. gWLM repeats the previous two substeps.
For information on what types of workloads to combine for optimal resource utilization, refer to
the online help topic “Getting the Most Out of gWLM.”
How gWLM allocates CPU resources
gWLM addresses priority levels from highest to lowest, allocating resources to all requests at a
given priority level before considering lower priority requests. If, at some priority level, all requests
cannot be satisfied, the remaining resources are distributed so that the total resource allocation
for each workload is as near the proportion of its weight relative to the sum of all the weights as
possible. If gWLM has satisfied all resource requests at all priorities and there are resources still
to be allocated, it will distribute the remaining resources by weight. Again, this is so that the total
resource allocation for each workload is as near the proportion of its weight relative to the sum of
all the weights as possible.
Table 1 lists the default weights for the various policy types. For policies with weights, you can
also set the weight explicitly.
Table 1 Default weights by policy type
Default weightPolicy type
N/AFixed
(You cannot deploy an SRD where all the workloads with fixed policies are not
satisfied.)
1Utilization
Equal to its owned valueOwnBorrow
1Custom
NOTE: To ensure CPU resource allocations behave as expected for OwnBorrow policies, the
sum of the CPU resources owned cannot exceed the number of cores in the SRD. (However, if the
sum is less than the number of cores in the SRD, the excess is distributed to all compartments in
proportion to the amounts owned. Thus, workloads will routinely get more than they are due.)
Available interfaces
There are two interfaces for controlling and monitoring gWLM:
• Systems Insight Manager
A web-based interface accessed through the Shared Resource Domain tab reached through
the Tools→HP Matrix OE visualization... menu in Systems Insight Manager (access Systems
Insight Manager via the URL http://hostname:280 where hostname represents the name of
your Virtual Server Environment Management Software CMS).
To orient with gWLM, see the gWLM Home page. To view the gWLM Home page, select
Tools→HP Matrix OE visualization... from the System Insight Manager menu bar. Then from
the HP Matrix OE visualization menu bar, select
Tools→Global Workload Manager→Getting Started - gWLM Home…
10 Overview
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