Home » VMware » 2VB-601 » 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)
Correct Answer: B
Explanation/Reference:
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.
