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Foglight Capacity Management 5.7.7 - User Guide

Scenario Modeler

The Scenario Modeler view allows you to project what happens if virtual machines are added to or moved among the servers supporting an IT infrastructure. Using this view you obtain the following projections:

•
Projected CPU Consumption
•
Projected Memory Consumption
•
Projected Network Consumption
•
Projected Storage Consumption requirements

Capacity management scenarios allow you to select host machines and target those machines against servers to project what happens if hosts are added or removed. Charts are generated, showing the result of the addition or removal of the hosts. You can select any number of hosts and predict their combined impact on the targeted server’s resources. You can also select any server to see the resource impact caused by all of its resident hosts.

Figure 24. Scenario Modeler

Thresholds are user-configurable. You change the hardware configuration of the server to learn about the effects of different hypothetical configurations. For example, what if you had four more CPUs? What if you had 3.6 gigahertz CPUs? What if you had twice as much memory? You create and model what the capacity loads could look like on a hypothetical server.

Figure 25. Usage Scenario Settings

The Scenario Modeler view allows you to set scenario properties, select available hosts, choose a target server, and view the projected capacity metrics in the resulting graphs. When creating capacity management scenarios, you set the CPU capacity, memory capacity, network bandwidth, and total available storage based on the actual system used to host the virtual machines. These values are used to set the capacity lines on the charts that show the server’s capacities.

Figure 26. Scenario Modeler capacity lines

To create capacity management scenarios, charts, and generate a report:
1
You first create a capacity management usage scenarios to project how adding hosts to a server affects CPU capacity, memory capacity, network bandwidth, and available storage. For more information, see Create Usage Scenario.
2
Select the hosts. Hosts are selected and added to a capacity management scenario to determine if a server’s capacity is exceeded. For more information, see Select Hosts.
3
Select the target server—you select a target server to represent the type of server the selected hosts (VMs) is targeted against. For more information, see Select Target.
4
Open and manage usage scenarios—after creating capacity management usage scenarios, they are saved and can be opened to edit and enter new properties for CPU capacity, memory capacity, network bandwidth and available storage. For example, raising the bandwidth to 4000 megabytes per second. For more information, see Open Usage Scenario.
5
Modifying time range criteria—prior to moving a host to a server, it is recommended to look at a longer historical timeframe (for example, last month or this year) to get a broader view of the server’s resource availability rather than using the default setting of the last four hours. If you end up with a large list of excluded hosts, or VMs with insufficient data, you can experiment with shorter time intervals. For more information, see Modifying Time Range Criteria.

The Scenario Modeler tab provides the following views:

•
Create Usage Scenario
•
Open Usage Scenario
•
Edit Properties
•
Delete Scenario
•
Select Hosts
•
Select Target
•
Included Hosts
•
Excluded Hosts
•
Modifying Time Range Criteria

Create Usage Scenario

You begin by creating usage scenarios. These scenarios allow you to select available host machines, then target those machines to available servers to determine:

•
Projected CPU consumption
•
Projected Network consumption
•
Projected Memory consumption
•
Projected Storage requirements
Figure 27. Usage scenarios

To create a capacity management usage scenario:
1
Click Create Usage Scenario.
Figure 28. Create Usage Scenario
The Add/Edit Usage Scenario view appears with default property values entered.
Figure 29. Add/Edit Usage Scenario view
•
Scenario Name—name assigned to the scenario.
•
Description—detailed description of scenario properties.
•
CPU Capacity (GHz)—CPU capacity of the server in gigahertz.
•
Memory Capacity(GB)—memory capacity of the server in gigabytes.
•
Network Bandwidth (Mb/s)—network bandwidth of the server in megabits per second.
•
Available Storage (GB)—available storage of the server in gigabytes.
2
Enter the required scenario properties.
3
Click Save.

Open Usage Scenario

After creating a capacity management usage scenario, you can open the scenario to change the originally entered properties to tailor capacity management needs.

To open a usage scenario:
1
Click Open Usage Scenario.
Figure 30. Open Usage Scenario button
The Select Usage Scenario view appears.
2
Select the required usage scenario.
3
Click OK.
The selected usage scenario appears in the Scenario Modeler view.
Figure 31. Scenario Modeler view

Edit Properties

After opening a usage scenario, Edit Properties allows you to edit a scenario already created and tailor its properties to change capacity management scenarios.

To edit a capacity management usage scenario:
1
Click Edit Properties.
Figure 32. Edit Properties button
The Add/Edit Usage Scenario Properties view appears.
2
Make the required capacity management usage scenario property changes.
Figure 33. Usage Scenario Properties to edit
3
Click Save.
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