Workload Balancing Basic Concepts


XenCenter 2023.x.x is currently in preview and is not supported for production use. Note that any future references to production support apply only when XenCenter 2023.x.x and XenServer 8 go from preview status to general availability.

You can use XenCenter 2023.x.x to manage your XenServer 8 and Citrix Hypervisor 8.2 CU1 non-production environments. However, to manage your Citrix Hypervisor 8.2 CU1 production environment, use XenCenter 8.2.7. For more information, see the XenCenter 8.2.7 documentation.

You can install XenCenter 8.2.7 and XenCenter 2023.x.x on the same system. Installing XenCenter 2023.x.x does not overwrite your XenCenter 8.2.7 installation.

Workload Balancing captures data for resource performance on virtual machines and physical hosts. It uses this data, combined with the preferences you set, to provide optimization and placement recommendations. Workload Balancing stores performance data in an internal database: the longer Workload Balancing runs, the better its recommendations become.

Workload Balancing recommends moving virtual-machine workloads across a pool to get the maximum efficiency, which means either performance or density depending on your goals. Within a Workload Balancing context:

  • Performance refers to the usage of physical resources on a host (for example, the CPU, memory, network, and disk utilization on a host). When you set Workload Balancing to maximize performance, it recommends placing virtual machines to ensure the maximum amount of resources are available for each virtual machine.
  • Density refers to the number of virtual machines on a host. When you set Workload Balancing to maximize density, it recommends placing VMs on as few hosts as possible, while ensuring they maintain adequate computing power. This behavior enables you to reduce the number of hosts powered on in a pool.

Workload Balancing lets you modify settings for placement (performance or density), power management, automation, metric weightings, and performance thresholds.

Workload Balancing do not conflict with High Availability settings. High Availability settings always take precedence.

Workload Balancing Basic Concepts

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