Review: VMware Virtual SAN turns storage inside-out
Convergence of compute and storage is all the rage in the virtualization market these days. You see it in Microsoft's Windows Server 2012 R2 with Hyper-V and Storage Spaces. You see it in third-party platforms such as Nutanix. And you see it in VMware's vSphere flagship with the addition of Virtual SAN, a new capability built into the ESXi hypervisor that turns the direct-attached storage in vSphere cluster nodes into highly available, high-performance shared storage. The goals behind Virtual SAN, or VSAN, are both to lower overall storage costs and to eliminate the I/O latencies associated with networked storage. VSAN achieves high availability by replicating storage objects (virtual machine disks, snapshot images, VM swap disks) across the cluster, allowing admins to specify the number of failures (nodes, drives, or network) to be tolerated on a per-VM basis. [ Virtualization showdown: Microsoft Hyper-V 2012 vs.
• VMware Networking & Storage