An administrator is designing a vSphere cluster with the VSAN default policy. The requirement is to maintain full redundancy of data and virtual disks during any patching or maintenance of this…

The correct answer is A. A minimum of four hosts in the cluster. 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…

Design and Sizing

Question

An administrator is designing a vSphere cluster with the VSAN default policy. The requirement is to maintain full redundancy of data and virtual disks during any patching or maintenance of this cluster. What is needed to meet the needs of this scenario?

Options

AA minimum of four hosts in the cluster
BVMware Proactive HA
CMultiple disk groups per host
DUse of RAID-5/6 erasure coding

How the community answered

(19 responses)

A
79% (15)
B
11% (2)
C
5% (1)
D
5% (1)

Explanation

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.

Topics

#cluster design#data redundancy#maintenance mode#host count

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