What Is VMware vSAN and How Do You Configure a vSAN Cluster?

vSAN does not need dedicated SAN hardware. It pools local disks such as SSDs and HDDs across the hosts in a cluster and hands that capacity out to virtual machines according to storage policies. Administrators define policies for performance, availability, and fault tolerance, so each workload gets the level of protection and efficiency it needs.

vSAN supports hybrid configurations, which use SSDs for cache and HDDs for capacity, and all-flash configurations for higher performance. Its advanced capabilities include policy-based management, encryption, stretched clusters for multi-site resilience, health monitoring, and integration with vSphere features like HA, DRS, and vMotion.

To configure a vSAN cluster with Quickstart in vCenter:

1. Create or select a cluster and open the Configure > Quickstart tab. 2. Enable services such as HA, DRS, and vSAN. 3. Add ESXi hosts to the cluster. 4. Configure networking for vSAN and vMotion traffic. 5. Claim eligible disks for the cache and capacity tiers. 6. Review and finalize the configuration.

When you finish, the cluster presents one datastore shared by all hosts.

Q1: How many hosts are required for vSAN?

At least three hosts that contribute capacity are recommended. Two-node configurations need a witness host.

Q2: Does vSAN require external storage?

No. It uses the local storage devices inside the ESXi hosts.

Q3: What is policy-based storage management?

It lets administrators set performance and availability requirements for each virtual machine.

Q4: Can vSAN support disaster recovery scenarios?

Yes. Stretched clusters and encryption add resilience and data protection.