Administration

Concurrent Operations Limits for vCenter Server and View Composer
When you add vCenter Server to View or edit the vCenter Server seings, you can congure several options
that set the maximum number of concurrent operations that are performed by vCenter Server and View
Composer.
You congure these options in the Advanced Seings panel on the vCenter Server Information page.
Table 2‑1. Concurrent Operations Limits for vCenter Server and View Composer
Setting Description
Max concurrent vCenter
provisioning operations
Determines the maximum number of concurrent requests that View Connection
Server can make to provision and delete full virtual machines in this vCenter Server
instance.
The default value is 20.
This seing applies to full virtual machines only.
Max concurrent power
operations
Determines the maximum number of concurrent power operations (startup,
shutdown, suspend, and so on) that can take place on virtual machines managed by
View Connection Server in this vCenter Server instance.
The default value is 50.
For guidelines for calculating a value for this seing, see “Seing a Concurrent Power
Operations Rate to Support Remote Desktop Logon Storms,” on page 21.
This seing applies to full virtual machines and linked clones.
Max concurrent View Composer
maintenance operations
Determines the maximum number of concurrent View Composer refresh, recompose,
and rebalance operations that can take place on linked clones managed by this View
Composer instance.
The default value is 12.
Remote desktops that have active sessions must be logged o before a maintenance
operation can begin. If you force users to log o as soon as a maintenance operation
begins, the maximum number of concurrent operations on remote desktops that
require logos is half the congured value. For example, if you congure this seing
as 24 and force users to log o, the maximum number of concurrent operations on
remote desktops that require logos is 12.
This seing applies to linked clones only.
Max concurrent View Composer
provisioning operations
Determines the maximum number of concurrent creation and deletion operations that
can take place on linked clones managed by this View Composer instance.
The default value is 8.
This seing applies to linked clones only.
Setting a Concurrent Power Operations Rate to Support Remote Desktop
Logon Storms
The Max concurrent power operations seing governs the maximum number of concurrent power
operations that can occur on remote desktop virtual machines in a vCenter Server instance. This limit is set
to 50 by default. You can change this value to support peak power-on rates when many users log on to their
desktops at the same time.
As a best practice, you can conduct a pilot phase to determine the correct value for this seing. For planning
guidelines, see "Architecture Design Elements and Planning Guidelines" in the View Architecture Planning
document.
The required number of concurrent power operations is based on the peak rate at which desktops are
powered on and the amount of time it takes for the desktop to power on, boot, and become available for
connection. In general, the recommended power operations limit is the total time it takes for the desktop to
start multiplied by the peak power-on rate.
Chapter 2 Configuring View Connection Server
VMware, Inc. 21