January 11, 2021 at 11:12 pm
If there are just two nodes in the cluster and dynamic quorum is enabled . Do we need to have witness at all?
Thanks
January 12, 2021 at 6:09 pm
I think the information here https://docs.microsoft.com/en-us/windows-server/storage/storage-spaces/understand-quorum#dynamic-quorum-behavior (scroll down to 'two nodes without a witness) will help with your question?
I know that when I ran a cluster on Windows Server 2012 and Sql Standard 2016 the cluster would sometimes go offline when we restarted a host. I added a witness and the problem stopped. In retrospect I suspect it depended on whether the remaining node had a vote at the point of restart but I didn't know about dynamic votes at the time. I saw advice to add a witness to resolve quorum issues and, having followed that, the problem stopped so I didn't have time to investigate further.
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