What is the minimum number of physical hosts required to be a supported vSAN configuration?

Consider the following vSAN cluster scenario:

– All hosts are members of the same cluster.

– All hosts are contributing storage capacity to the vSAN datastore.

– There is not vSAN Witness Host.

– All virtual machines are assigned a storage policy where Primary level of failures to tolerate = 1.

What is the minimum number of physical hosts required to be a supported vSAN configuration?
A . Five (5)
B . Three (3)
C . Two (2)
D . Four (4)

View Answer

Answer: B

Explanation:

VMware vSAN Design and Sizing Guide 6.5. Page: 18

When not using a witness, there is a minimum requirement of 3 ESXi hosts in a vSAN cluster. This is the same for all versions. While vSAN fully supports 3-node configurations, they can behave differently than configurations with 4 or greater nodes. In particular, in the event of a failure there is no way for vSAN to rebuild components on another host in the cluster to tolerate another failure. Also with 3-node configurations, vSAN does not have the ability to migrate all data from a node during maintenance.