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HP Capacity Advisor provides
trend analysis to allow you to better understand how the utilization
of resources is changing over time and multiple levels of forecast
models to allow precise control of forecasting future utilization. Defining Forecast Models | |
Whenever a Capacity Advisor report or profile
is generated with an end date later than the current date, the historical
utilization data is projected into the future. The projection is indicated
in the utilization graphs by a colored background next to the usual
white background. This projection is done based on a forecast model. Forecast models
can be defined globally, for individual workloads or systems, for
a scenario, and for individual workloads within a scenario. Since
the process for defining a forecast model is basically the same regardless
of where it is in the hierarchy of forecast models, the procedures
below are broken into two parts: accessing the forecast model and
defining it. | | | |  | NOTE: Although forecast models cannot be deleted, all
but the global forecast model can be disabled and enabled. Follow
the appropriate procedure for accessing the forecast model and then
follow the procedure for disabling or enabling it. | | | | |
The Forecast Model HierarchyThe forecast model can be specified at four different
levels within Capacity Advisor, with more specific forecast models
overriding more general models, as indicated in the following
table: Table 5-1 Forecast Models | Forecast | Description | Overrides |
|---|
| Global
Forecast | Applies to all workloads
in Capacity Advisor for which a more specific forecast
is not provided. | | | Workload
Forecast | Applies to a specific
workload in Capacity Advisor unless a more specific
forecast is provided. | | | Scenario
Forecast | Applies to all workloads
within a Capacity Advisor scenario for which a more
specific forecast is not provided. | | | Scenario
Workload Forecast | Applies
to a specific workload within a Capacity Advisor scenario. | | • Global | | • Workload | | • Scenario |
|
Accessing the Global Forecast ModelThe annual growth rates for the global forecast
model are frequently based on an organization's planned
growth rate. The global forecast model applies to all reports
generated on systems and complexes. Reports on workloads or
scenarios without a forecast model also use the global forecast
model. Prerequisites. To define the global forecast model: You must be logged in to HP Systems Insight Manager. (See “Accessing Capacity
Advisor”.) You must have sufficient authorization
to define the global forecast model (see VSE Management Software Version 4.0 Getting Started Guide).
Procedure 5-21 To Access the Global Forecast Model If
you are not on the Capacity Advisor tab: If the Capacity Advisor tab is
visible, click the Capacity Advisor tab. If the Capacity Advisor tab is
not visible, select Optimize Capacity AdvisorView Scenarios... from the HP SIM menu bar.
The Capacity Advisor tab opens with a list of scenarios. From
the Capacity Advisor menu bar, select ModifyGlobal Forecast... The Forecast Editor - Global Forecast Model screen displays.
Defining the Global Forecast ModelThe settings that you define here are applied globally in the
absence of other specifically targeted forecast models. This procedure assumes that you have opened the Global Forecast
Model screen (see “Accessing the Global Forecast Model”.) Provide
a brief description of the forecast model in the Description field. Choose a time frame to use in tiling the data into the
future (default: fixed interval). The time interval (date
range) field adjusts according to your time frame selection. Select the date range for defining the period of data
collection to use as the basis for the forecast. For a fixed interval: select the
calendar interval, Beginning or Ending, and the date (MM-DD-YYYY) For a ranged interval: select the
beginning and ending dates and times. For a float interval: select the
calendar interval, Beginning or Ending, and general date indicator (default: Last Full Day)
Provide Annual Projected Growth Rates for each resource: CPU,
Memory, Network I/O, and Disk I/O. Use positive values for increasing
utilization, negative values for decreasing utilization, and zero
for no change). The default is 1% projected annual growth for every
resource. Click
the OK button to save and apply a new definition
for global forecasting.
Accessing the Forecast Model for a Workload or SystemWhen the resource utilization of an individual
workload or system is expected to differ from that predicted by the
global forecast model, a workload- or system-specific forecast model
can be created. Forecasting for workloads or systems is done from within a Profile
Viewer associated with the workload or system. See “Using the Profile Viewer” for information on how to access the viewer from the HP SIM Optimize menu or from a scenario. | | | |  | IMPORTANT: The forecast model for a system is not inherited
by any sub-OS workloads. If a system with sub-OS workloads is included
in a scenario, the forecast model will not be used within the scenario. | | | | |
Prerequisites. To define the forecast model for a workload or
system: You must be logged in to HP Systems Insight Manager. (See “Accessing Capacity
Advisor”.) You must have sufficient authorization to define
the forecast model for a workload or a system (see VSE Management Software Version 4.0 Getting Started Guide).
Defining the Forecast Model for a Workload or System The following procedure assumes that a Profile Viewer is open
(see “Using the Profile Viewer”.) Locate
the Edit Forecast Model... link near the top
of the Profile Viewer screen, and click it. The Forecast Editor - Workload Forecast Model screen is displayed. Follow steps 1–4 in the procedure “Defining the Global Forecast Model” as the fields are the same for these steps.
The default state of the new forecast definition is Enabled. Disabling a Forecast Model for a System or WorkloadWhile it is not possible to delete a forecast
model, user-defined system or workload forecast models can be disabled
by accessing the appropriate forecast model via a Profile Viewer and
using the following procedure. Click
the Disable radio button. Click
the OK button.
For more information, see Enabling a Forecast ModelIf you have disabled a user-defined system or
workload forecast model, you can re-enable it by accessing the appropriate
forecast model via a Profile Viewer and using the following procedure. Procedure 5-25 To Enable a Forecast Model Click
the Enable radio button. Click
the OK button.
Generating Forecasts | |
Once you have defined one or more forecast models,
you can view the results of the forecast models two ways: Viewing Forecast Data in a Profile ViewerThe profile viewer provides a quick view of resource
utilization for a system, complex, or workload. Once the profile
viewer is posted, you can view the forecast by extending the
date range into the future. To view forecasts within a Profile Viewer: Procedure 5-26 To View Forecast Data Within a Profile Viewer Change
the Time Frame and/or Interval and/or Beginning and/or Ending for the profile to
include future dates and/or times. If necessary, click
the Refresh button. The graph will be updated. Historical utilization data will be
plotted on a white background and forecast data will be
plotted on a colored background.
Viewing Forecast Data in a Utilization ReportUse the procedure specified in “Producing Graphs and Reports” and specify Ending (and possibly
Beginning) times under Date
Selection to include future times. Historical utilization data will be plotted on
a white background and forecast data will be plotted on a
colored background. |
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