Administration

Table Of Contents
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URL of the vCenter Server (if applicable).
Options
Table 12-10 shows the options that you can use to specify the machine whose details you want to display.
Table 1210. Options for Displaying Information About Machines
Option Description
-d desktop
Species the name of the desktop pool.
-m machine
Species the name of the virtual machine.
-u domain\user
Species the login name and domain of the user.
Examples
Display information about the underlying machine for the remote desktop in the pool dtpool2 that is
assigned to the user Jo in the CORP domain and format the output as XML using ASCII characters.
vdmadmin -M -u CORP\Jo -d dtpool2 -xml -n
Display information about the machine machine3 and format the output as comma-separated values.
vdmadmin -M -m machine3 -csv
Reclaiming Disk Space on Virtual Machines Using the M Option
You can use the vdmadmin command with the -M option to mark a linked-clone virtual machine for disk space
reclamation. Horizon 7 directs the ESXi host to reclaim disk space on the linked-clone OS disk without
waiting for the unused space on the OS disk to reach the minimum threshold that is specied in Horizon
Administrator.
Syntax
vdmadmin -M [-b authentication_arguments] -d desktop -m machine -markForSpaceReclamation
Usage Notes
With this option, you can initiate disk space reclamation on a particular virtual machine for demonstration
or troubleshooting purposes.
Space reclamation does not take place if you run this command when a blackout period is in eect.
The following prerequisites must be met before you can reclaim disk space by using the vdmadmin command
with the -M option:
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Verify that Horizon 7 is using vCenter Server and ESXi version 5.1 or later.
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Verify that VMware Tools that are provided with vSphere version 5.1 or later are installed on the virtual
machine.
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Verify that the virtual machine is virtual hardware version 9 or later.
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In Horizon Administrator, verify that the Enable space reclamation option is selected for vCenter
Server. See Allow vSphere to Reclaim Disk Space in Linked-Clone Virtual Machines,” on page 18.
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In Horizon Administrator, verify that the Reclaim VM disk space option was selected for the desktop
pool. See "Reclaim Disk Space on View Composer Linked Clones" in the Seing Up Virtual Desktops in
Horizon 7 document.
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Verify that the virtual machine is powered on before you initiate the space reclamation operation.
View Administration
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