Citrix Virtual Apps and Desktops service

Load balance machines

Note:

  • This feature applies to all your catalogs and only to multi-session OS machines.

This feature lets you control how to load balance machines. You have two options: vertical and horizontal. By default, horizontal load balancing is enabled.

  • Vertical load balancing. Assigns an incoming user session to the most loaded machine that has not yet reached the maximum load. This saturates existing machines before moving on to new machines. Users disconnecting from existing machines frees up capacity on those machines. Incoming loads are then assigned to those machines. Vertical load balancing degrades the user experience but reduces costs (sessions maximize powered-on machine capacity).

    Example: You have two machines configured for 10 sessions each. The first machine handles the first 10 concurrent sessions. The second machine handles the eleventh session.

    Alternatively, you can use PowerShell to enable or disable vertical load balancing site-wide. Use the UseVerticalScalingForRdsLaunches setting in the Set-BrokerSite cmdlet. Use Get-BrokerSite to display the value of the UseVerticalScalingForRdsLaunches setting. See the cmdlet help for details.

  • Horizontal load balancing. Assigns an incoming user session to the least-loaded, powered-on machine available. Horizontal load balancing improves the user experience but increases costs (because more machines are kept powered on). By default, horizontal load balancing is enabled.

    Example: You have two machines configured for 10 sessions each. The first machine handles five concurrent sessions. The second machine also handles five.

To configure this feature, from Manage > Full Configuration, select Settings in the left pane. Select an option under Load balance multi-session catalogs.

Load balance machines