App Volumes - Storage Test

Shared storage has separate datastores for desktop and RDSH server master images and for App Volumes AppStacks. Shared storage is specific for all ESXi hosts that host desktops connecting to AppStacks and writable volume. If local storage is used, AppStacks can be placed on the same datastore where VMs reside. The App Volumes service can be configured to refer to local storage before referring to shared storage. If specified AppStacks exist on the local storage, then these AppStacks are mounted in favor of duplicate copies that exist on shared storage.

The VMware App Volumes Manager relies heavily on the storage (datastores) for connecting to the AppStacks and Writable volumes that hosts the applications and other files. Unavailability of a datastore or the lack of storage space in a datastore can severely hamper the operations of the virtual desktop and can consequently delay the boot time of the virtual desktops as the applications will not be attached to the desktop. By keeping constant tabs on the space usage of each datastore managed by the target VMware App Volumes Manager, this test proactively alerts you to potential space contentions on a datastore.

Target of the test : A VMware App Volumes Server

gent deploying the test : An internal/remote agent

Outputs of the test : One set of results for each datastore on the target VMware App Volumes Manager 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 at which the specified Host listens to. By default, this is set to 3443.

AppVol User

By default, the eG agent uses the RESTful APIs to collect the metrics from the target VMware App Volumes Manager. To be able to connect to the RESTful API, the eG agent should be configured with the credentials of a user belonging to an active directory group that is vested with the Administrators (Read only) rights. Specify the credentials of such a user in this text box. To know how to assign the Administrators (Read only) role to an active directory group, refer to Enabling the Administrators (Read only) role.

AppVol Password

Specify the password that corresponds to the AppVol User.

Confirm Password

Confirm the password by retyping it here.


By default, in most virtualized environments, the VMware App Volumes Manager listens on port 3443 irrespective of being SSL-enabled or not. This implies that while monitoring the target VMware App Volumes Manager , the eG agent, by default, connects to port 3443 of the VMware App Volumes Manager to pull out metrics. Accordingly, the WebPort parameter is set to 3443. In some environments however, the default port 3443 might not apply. In such a case, against the WebPort parameter, you can specify the exact port at which the VMware App Volumes Manager in your environment listens so that the eG agent communicates with that port.


Set the SSL flag to Yes, if SSL (Secured Socket Layer) is to be used to connect to the target VMware App Volumes Manager, and No if it is not.

Measurements made by the test
Measurement Description Measurement Unit Interpretation

Total appstacks

Indicates the number of AppStacks placed on this datastore.



Total writables

Indicates the number of writable volumes placed on this datastore.



Total storage space

Indicates the amount of space allocated to this datastore.



Used space

Indicates the amount of space that is already utilized by this datastore.


Ideally, the value of this measure should be low. If this value grows close to that of the Total storage space measure, then you may consider adding more storage to the datastore, or free up the space in the datastore by deleting unnecessary data.

Comparing the value of this measure across datastores will help you identify the datastore that is utilizing the maximum amount of storage space.

Free space

Indicates the amount of space that is available for use in this datastore.


A high value is desired for this measure. A sharp/consistent decrease in the value of this measure is an indication for the administrators to add more free space to the datastore before the datastore runs out of free space.

Space utilization

Indicates the percentage of space utilized by this datastore.


A value close to 100% indicates that the datastore is currently running out of space.