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View Storage Accelerator vs. VirtuCache – VMware Host Cache

The big difference between the two is that VSA caches only 2GB of reads from the Master VM1,2. VirtuCache caches reads + writes from all server & desktop VMs, and it can cache to TBs of in-host SSD/RAM, so all storage IO is serviced from in-host cache.

More details in the table below.