A VMware Virtual SAN is a hybrid storage system that leverages and aggregates local solid-state drives (SSDs) as cache and local hard disk drives (HDDs) to provide a clustered datastore that can be utilized by virtual machines.
Virtual SAN is a distributed layer of Software running natively as part of ESXi.
Virtual San Virtualizes Local Physical Storage Resources of ESXi hosts and turns them into Pool of Storage.
VSAN can be created on New cluster or can also be enabled on existing cluster.
Host contributing its local storage to VSAN datastore it must provide at least one SSD and one HDD.
Hard Disks provides a persistent Storage capacity and SSD provides caching tier.
Virtual SAN requires A minimum of three ESXi hosts contributing local storage.
VMkernel Ports need to be created for Carrying VSAN traffic.
Using Virtual SAN in production environments requires a special license that you assign to the Virtual SAN clusters. The capacity of the license must cover the total number of CPUs in the cluster.
Depending on the disk group configuration in the cluster, you can assign one of two types of licenses: a license for hybrid configurations, and a license for hybrid and all-flash configurations.
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