December 1, 2022 at 10:23 pm
If we have only two nodes cluster for alwayson high availability group, one in location A, the other in location B in same city. B is used for disaster recovery purpose. Do we really need a witness server instance for quorum? It seems it made the disaster recovery complicated at that time if a quorum setup.
December 2, 2022 at 7:25 pm
Yes - you need some type of witness for the cluster. Cluster quorum must be more than 50% votes - and if you only have 2 nodes, as soon as one node is down the cluster will be unhealthy and shut down.
Jeffrey Williams
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December 2, 2022 at 9:37 pm
Thanks,
If the witness server instance is also on location A, same location as ServerA the primary node, if a disaster happens, will quorum still counts correctly?
December 3, 2022 at 10:52 pm
If the disaster is in Site B yes the cluster will still stand.
Otherwise if site A goes offline then no the cluster is down.
You can have a look at changing quorum weightings etc, but I would be looking at using Azure Storage Accounts and doing cloud based witness.
Otherwise your into forcing quorum when disaster hits.
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