A VSA cluster leverages the computing and storage resources of several ESXi hosts and provides a set of datastores that are accessible by all hosts within the datacenter.

An ESXi host that runs a vSphere Storage Appliance and participates in a VSA cluster is a VSA cluster member. With vSphere Storage Appliance 1.0, you can create a VSA cluster with two or three VSA cluster members. The status of the VSA cluster is online only when more than half of the members are online.

A VSA cluster enables the following features:

Shared datastores for all hosts in the datacenter

Replica of each shared datastore

vSphere vMotion and vSphere HA

Hardware and software failover capabilities

Replacement of a failed VSA cluster member

Recovery of an existing VSA cluster