Product Documentation

Editing Workload Balancing Settings

May 02, 2013
Important: Workload Balancing (WLB) and its functionality has been removed from XenServer version 6.2 and higher. Applications, code, or usage that depend WLB will not function in XenServer version 6.2 and higher. See CTX137333 for details.
After connecting to the Workload Balancing virtual appliance, you can edit the settings Workload Balancing uses to calculate placement and optimization recommendations. You can perform tasks such as the following:
Note: After connecting or reconnecting to Workload Balancing, wait at least sixty seconds (until the Workload Balancing (/var/log/wlb/LogFile.log) shows discovery is finished) before changing settings.

How Workload Balancing settings apply

Workload Balancing settings apply collectively to all virtual machines and hosts in the pool.

Provided the network and disk thresholds align with the hardware in your environment, you might want to consider using most of the defaults in Workload Balancing initially.

After Workload Balancing is enabled for a while, Citrix recommends evaluating your performance thresholds and determining if you need to edit them. For example, consider if you are:
  • Getting optimization recommendation when they are not yet required. If this is the case, try adjusting the thresholds until Workload Balancing begins providing suitable optimization recommendations.
  • Not getting recommendations when you think your network has insufficient bandwidth. If this is the case, try lowering the network critical thresholds until Workload Balancing begins providing optimization recommendations.

Before you edit your thresholds, you might find it handy to generate a Host Health History report for each physical host in the pool.

You can use either the Workload Balancing Configuration properties in XenCenter or the XE commands to modify the configuration settings.

To update the credentials XenServer and the Workload Balancing server use to communicate, see Updating Workload Balancing Credentials.

For more detailed guidance about tuning Workload Balancing settings, see the Workload Balancing Administrator's Guide.

To display the Workload Balancing Settings dialog box

  1. In the Resources pane of XenCenter, select your-resource-pool.
  2. In the Properties pane, click the WLB tab.
  3. In the WLB tab, click Settings.