QVD Desktop OS Flavour Test

An Operating System Flavour (OSF) is loaded into any number of virtual machines on a QVD Server Node in order to serve a virual desktop to a client. The OSF is usually installed into QVD along with particular runtime parameters such as the amount of system memory that should be available to it.

This test auto-discovers the Operating System Flavours configured on the QVD and reports the total memory size of each OSF. In addition, this test indicates if overlay is enabled on each OSF.

Target of the test : A Quality Virtual Desktop Node

Agent deploying the test : A remote agent

Outputs of the test : One set of results for every OSF being monitored.

Configurable parameters for the test
Parameter Description

Test period

How often should the test be executed.


The host for which the test is to be configured.


The port number at which the specified host listens to. By default, this is NULL.

QVD User and QVD Password

Provide the credentials of a user possessing root user privileges in the QVD User and QVD Password text boxes.

Confirm Password

Confirm the password by retyping it here.

Measurements made by the test
Measurement Description Measurement Unit Interpretation


Indicates the total memory size of this Operating System Flavour.




Indicates whether/not overlay is enabled on this Operating System Flavour.


Virtual Machines make use of overlays in order to best utilize different elements of the Guest operating system, and in order to make particular elements persistent. For instance, while write activity is not persistent within the actual OSF that is loaded, it is important that data written to the user’s home folder or desktop is stored for future connections to the virtual desktop. Overlays can also be used to make other data such as log and tmp files persistent from a user perspective.

This measure reports a value Yes if the overlay is enabled and a value No if otherwise.

The numeric values that correspond to the measure values discussed above are listed in the table below:

Numeric Value Measure Value
1 Yes
0 No


By default, this measure reports the values Yes or No only to indicate whether the overlay is enabled or not. The graph of this measure however, is represented using the numeric equivalents - 0 or 1.