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Foglight Capacity Director 5.8.2 - User Guide

Using Foglight Capacity Director Getting Started Tab Current Capacity Tab Resource Utilization Tab Scenario Modeler Tab Server Purchase Tab Report Tab Performance Tuning Tab Changes and DRS Rules Tab Infrastructure Organizations Tab

Optimal Placement

To perform an optimal placement:
1
In the Scenario Modeler pane, select a resource that you want to balance under Step 1: Select a resource for balance.
2
Select Optimal Placement under Step 2: Select a placement approach.
3
Select an organization from the available organizations.
Or
Click >> Link to Infrastructure Organizations to add a new organization as needed. For more information, see Infrastructure Organizations Tab.
The available clusters list is refreshed automatically.
4
Select the cluster(s) that you want to rebalance at the bottom of the page, and click Next.
* 
NOTE: A minimum of two clusters must be selected so that the rebalancing and the VM replacement take effects. The Next button is disabled when only one cluster is available, which means the current organization cannot be rebalanced.
5
Foglight for VMware calculates in the background and displays the following optimal placement recommendations:
•
Balance Scores: The original Balance Score before the optimal placement. For more information, see Balance Score.
•
Rebalance Scores: The updated Balance Score if the optimal placement is deployed.
•
Source Clusters: The clusters from which virtual machines are moved.
•
Number of moved VMs: The number of the virtual machines to be moved to the Target Clusters.
•
Moved VMs: The list of virtual machines to be moved to the Target Clusters.
•
Target Clusters: The clusters to which virtual machines are moved.
•
Yielding Metrics: The resource utilization before/after the optimal placement, and the increase percent of resources.
•
Conflicts: The list of conflicts to occur if the optimal placement is deployed. The types of conflicts include affinity rules violation, organization conflicts, and unavailable network accesses.
6
Click Start Over if you want to redo the resource rebalance.
Click Model Change to model the optimal placement. For more information, see Modeling Placement.
Click Deploy Change to execute the optimal placement as Foglight Capacity Director recommended. For more information, see Deploying Placement.
* 
NOTE: The Edit Assignment button is disabled for the Optimal Placement method.
Balance Score

Balance Score is scaled from 0 (non-balanced) to 100 (balanced). The same resource utilizations across all containers achieve a perfect Balance Score, for example, Balance Score is 100 if the CPU/Memory/Storage Capacity utilizations are 30% for all clusters. The Balance Score is approximately 0 if the resource utilization is 100% for cluster 1 and cluster 2, while resource utilization for cluster 3 is 0%.

Balance Score is divided into the following four ranges:

Table 5. Threshhold of Balance Score
Balance Score state
Default range
Default threshhold

Fatal (in red)

0 ~ 25

Default value is 25. To change this value, search for and edit CapacityHealthScoreFatal from Dashboards > Administration > Rules & Notifications > Manage Registry Variables.

Critical (in orange)

26 ~ 50

Default value is 50. To change this value, search for and edit CapacityHealthScoreCritical from Dashboards > Administration > Rules & Notifications > Manage Registry Variables.

Warning (in yellow)

51 ~ 75

Default value is 75. To change this value, search for and edit CapacityHealthScoreWarning from Dashboards > Administration > Rules & Notifications > Manage Registry Variables.

Normal (in green)

76 ~ 100

N/A

Modeling Placement

After Foglight Capacity Director calculates the result of optimal placement or manual placement, you can only model the virtual machines movement without deploying the movement in the realtime environment.

To model an optimal placement:
1
After Step 5 in To perform an optimal placement: or Step 7 in To perform a manual placement:, the placement recommendations appear in the Scenario Modeler pane.
2
Click Model Change.
The Schedule Scenario Deployment dialog box appears.
3
(Optional) In the Schedule Scenario Deployment dialog box, click Details to view details of Virtual Machine Movements. Click Close and return to the Schedule Scenario Deployment dialog box.
4
In the Schedule Scenario Deployment dialog box, select the Deployment Date, and click Schedule Scenario Deployment.
The Planned Changes pane is automatically updated to include the new modeled deployment.

Deploying Placement

After Foglight Capacity Director calculates the result of optimal placement or manual placement, you can deploy the virtual machines movement in the realtime environment, as needed.

To deploy an optimal placement:
1
After Step 5 in To perform an optimal placement: or Step 7 in To perform a manual placement:, the placement recommendations appear in the Scenario Modeler pane.
2
Click Deploy Change.
The Schedule Scenario Deployment dialog box appears.
3
(Optional) In the Schedule Scenario Deployment dialog box, click the Edit icon to open the Edit Movable VM(s) dialog box, and then click Browse next to Resource Pool to make changes as needed. Click Close to save changes and return to the Schedule Scenario Deployment dialog box.
4
In the Schedule Scenario Deployment dialog box, select the Deployment Date, and click Schedule & Deploy Scenario Deployment.
The placement is executed in the realtime environment, and Planned Changes pane is automatically updated to include the new modeled deployment.

Manual Placement

To perform a manual placement:
1
In the Scenario Modeler pane, select a resource that you want to balance under Step 1: Select a resource for balance.
2
Select Manual Placement under Step 2: Select a placement approach.
3
Select an organization from the available organizations.
Or
Click >> Link to Infrastructure Organizations to add a new organization as needed. For more information, see Infrastructure Organizations Tab.
The available clusters list is refreshed automatically.
4
Select a cluster that you want to rebalance as needed, and click Next.
The Scenario Modeler pane is updated to display the following information:
•
Balance Scores: The original Balance Score before the manual placement. For more information, see Balance Score.
•
Rebalance Scores: The updated Balance Score if the manual placement is deployed.
•
List of virtual machines available in the source cluster. For more information, see Hog Score.
•
Resource utilization before/after the movement in the source cluster.
•
List of virtual machines available in the target cluster.
•
Resource utilization before/after the movement in the target cluster.
5
From the list of virtual machines available in the source cluster, select the virtual machines that you want to move to the target cluster, and click Move In.
Or
From the list of virtual machines available in the target cluster, select the virtual machines that you want to move back to the source cluster, and click Move Out.
6
Click Proceed to Summary.
7
The Scenario Modeler pane is updated to display the following information:
•
The Rebalance Summary view
•
Balance Scores: The original Balance Score before the manual placement.
•
Rebalance Scores: The updated Balance Score if the manual placement is deployed.
•
Source Clusters: The clusters from which virtual machines are moved.
•
Number of moved VMs: The number of the virtual machines to be moved to the Target Clusters.
•
Moved VMs: The list of virtual machines to be moved to the Target Clusters.
•
Target Clusters: The clusters to which virtual machines are moved.
•
Yielding Metrics: The resource utilization before/after the manual placement, and the increase percent of resources.
•
Conflicts: The list of conflicts that will be occurred if the manual placement is deployed. The types of conflicts include affinity rules violation, organization conflicts, and unavailable network accesses.
8
Click Start Over if you want to redo the resource rebalance.
Click Model Change to model the manual placement. For more information, see Modeling Placement.
Click Deploy Change to execute the manual placement as Foglight Capacity Director recommends. For more information, see Deploying Placement.
Click Edit Assignment to return the Manual Virtual Machine Assignment view, and redo the manual placement from Step 4.
Hog Score

Hog Score can be regarded as the health score. It is scaled from 0 to 100 and helps achieve more predictable results when performing the rebalance. If Hog Score of a virtual machine is too low and is displayed in red, Foglight for VMware recommends moving this virtual machine to other clusters.

Resource utilization of a virtual machine and free capacity of a cluster are two factors that impact the Hog Score. For example, the Hog Score is low (unhealthy) if CPU utilization of a virtual machine is much higher than other resource utilizations in the same cluster. The Hog Score is high (healthy) if the CPU utilization of a virtual machine is much lower than the free capacity of a cluster on which this virtual machine is deployed.

Hog Score is divided into the following four ranges:

 
Table 6. Threshhold of Hog Score
Hog Score state
Default range
Default threshhold

Fatal (in red)

0 ~ 25

Default value is 25. To change this value, search for and edit CapacityHealthScoreFatal from Dashboards > Administration > Rules & Notifications > Manage Registry Variables.

Critical (in orange)

26 ~ 50

Default value is 50. To change this value, search for and edit CapacityHealthScoreCritical from Dashboards > Administration > Rules & Notifications > Manage Registry Variables.

Warning (in yellow)

51 ~ 75

Default value is 75. To change this value, search for and edit CapacityHealthScoreWarning from Dashboards > Administration > Rules & Notifications > Manage Registry Variables.

Normal (in green)

76 ~ 100

N/A

 

 
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