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VMware View Storage Accelerator (VSA), a.k.a. Content Based Read Cache (CBRC), versus Virtunet VirtuCache

VSA caches only those blocks that are shared by all VDI VMs, and it can only use a maximum of 2GB host RAM. Because of these two reasons, it ends up caching only a small subset of blocks from the master VM 1. In comparison, VirtuCache caches all storage IO, both reads and writes, whether it is from master VM, end user VDI VMs, server VMs, ESXi kernel, and it can cache to large amounts of in-host SSD and/or RAM. These two aspects of VirtuCache ensure that almost all storage IO is serviced from...