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Majority Maker VM Question #95955

Closed LDavis-Msft closed 2 years ago

LDavis-Msft commented 2 years ago

Hi Team, Just a question, why do we need a Majority Maker VM? We don't use it for 2 node clusters with azure fencing agent. Why do we need it for a scale out configuration? I have a customer looking to put in this design at the moment. Many thanks, Leon

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amanmcse commented 2 years ago

@LDavis-Msft Thank you for your feedback. We will investigate and update the thread further.

rdeltcheva commented 2 years ago

@LDavis-Msft In a HANA scale-out with HSR and Pacemaker environment, one would have naturally even number of nodes in the Pacemaker cluster (and more than 2). The majority maker node is needed to achieve odd number of cluster nodes and avoid split-brain scenario. Two-node pacemaker clusters are exception to the rule (for instance, there is extra corosync configuration to indicate that a Pacemaker cluster is a two-node cluster).

VikasPullagura-MSFT commented 2 years ago

@rdeltcheva Thanks for responding on this.

@LDavis-Msft Hope the provided information is helpful.

VikasPullagura-MSFT commented 2 years ago

@LDavis-Msft Hope the provided information is helpful.

We will now close this issue. If there are further questions regarding this, please tag me in a comment. I will reopen it and we will continue the discussion.