When allocating disk space, provide only enough space for the operating system, applications, and additional content that users might install or generate. Usually this amount is smaller than the size of the disk that is included on a physical PC.

Because datacenter disk space usually costs more per gigabyte than desktop or laptop disk space in a traditional PC deployment, optimize the operating system image size. The following suggestions might help optimize image size:

Remove unnecessary files. For example, reduce the quotas on temporary Internet files.

Choose a virtual disk size that is sufficient to allow for future growth, but is not unrealistically large.

Use centralized file shares or a View Composer persistent disk for user-generated content and user-installed applications.

The amount of storage space required must take into account the following files for each virtual desktop:

The ESX/ESXi suspend file is equivalent to the amount of RAM allocated to the virtual machine.

The Windows page file is equivalent to 150 percent of RAM.

Log files take up approximately 100MB for each virtual machine.

The virtual disk, or .vmdk file, must accommodate the operating system, applications, and future applications and software updates. The virtual disk must also accommodate local user data and user-installed applications if they are located on the virtual desktop rather than on file shares.

If you use View Composer, the .vmdk files grow over time, but you can control the amount of growth by scheduling View Composer refresh operations, setting a storage over-commit policy for View desktop pools, and redirecting Windows page and temporary files to a separate, nonpersistent disk.

You can also add 15 percent to this estimate to be sure that users do not run out of disk space.