You can enable View Storage Accelerator on desktop pools that contain instant clones and desktop pools that contain full virtual machines. This feature uses the Content Based Read Cache (CBRC) feature in ESXi hosts. Instead of reading the entire OS or application from the storage system over and over, a host can read common data blocks from cache.
CBRC uses ESXi host memory to cache virtual machine disk data, thus reducing IOPS required and improve performance during boot storms, when many machines start up or run anti-virus scans at once. By reducing the number of IOPS during boot storms, View Storage Accelerator lowers the demand on the storage array, which lets you use less storage I/O bandwidth to support your Horizon deployment. The feature is also beneficial when administrators or users load applications or data frequently.
You can enable or disable View Storage Accelerator globally and then enable or disable it for individual desktop pools. The steps to enable or disable View Storage Accelerator are different for instant-clone desktop pools and desktop pools that contain full virtual machines.
Native NFS snapshot technology (VAAI) and VVOL are not supported in pools that are enabled for View Storage Accelerator.