What is the way quorum majority is decided in FCI with file share?



  • In WSFC FCI with 2 nodes and file share, each node participates in a heart beat.

    The file share is a voting witness, and connectivity from any node to that share is counted as an affirmative vote. More than one-half of the possible votes must be affirmative for the cluster to be healthy.

    So this mean - in a 2 node fci with 1 file share, each node sends its heart beat to the cluster and its connectivity to witness is counted as 1 vote. So each node effectively sends 2 votes to the cluster?



  • In WSFC FCI with 2 nodes and file share, each node participates in a heart beat.

    It would be correct to sat that each node participates in "Quorum" not heartbeat. https://docs.microsoft.com/en-us/troubleshoot/windows-server/high-availability/private-heartbeat-configuration-on-cluster-server is method of communication while https://docs.microsoft.com/en-us/sql/sql-server/failover-clusters/windows/wsfc-quorum-modes-and-voting-configuration-sql-server?view=sql-server-ver15 is kind of "vote/understanding" that is reached in WSFC.

    So this mean - in a 2 node fci with 1 file share, each node sends its heart beat to the cluster and its connectivity to witness is counted as 1 vote.

    Assuming all nodes are voting in WSFC, in 2 node 1 FS configuration. Each node will present its votes and this will be counted as 1 vote( 1 vote from each node) and 1 vote will come from FS witness so total votes will be 3 votes. Each node can "only" give 1 vote not 2 votes.

    Please read the links shared.




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