mamoth100
Contributor
Contributor

VSAN Witness Topology for 2 Node Cluster

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I hope these are easy questions even though I can't seem to find something that would answer them.

  1. Have a two node VSAN cluster and looking to deploy the witness VM. Can this VM be over a WAN link? Is this a supported topology for VSAN?
  2. If we are allowed to do #1 above. Can we place two witness servers (the first one in one datacenter and the second is another datacenter) to connect to a single VSAN (making it a 4 node VSAN). This way, if a link goes down, we still have voting and the cluster can still reach a quorum.

Thank you!

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TheBobkin
VMware Employee
VMware Employee

1. If you mean is network to the Witness from data nodes over L3 supported, yes it is provided the RTT latency is <200ms.

Stretched Cluster Topology and Configuration | vSAN 6.6 Proof of Concept Guide | VMware

2. No, you cannot have more than one Witness per cluster, 1:1 ratio witness:stretched-cluster.

Bob

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TheBobkin
VMware Employee
VMware Employee

1. If you mean is network to the Witness from data nodes over L3 supported, yes it is provided the RTT latency is <200ms.

Stretched Cluster Topology and Configuration | vSAN 6.6 Proof of Concept Guide | VMware

2. No, you cannot have more than one Witness per cluster, 1:1 ratio witness:stretched-cluster.

Bob

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