Quorum Considerations for SQL Server 2012

Quorum is managed by the WSFC, irrespective of the number of SQL Server instances (FCI or standalone), number of nodes, number of availability groups

  • Important goal: Design to ensure

Unavailability of the DR site, or loss of network connectivity between sites should not impact the quorum of the WSFC

  • Two steps:

Node votes: First decide which nodes should have a vote

Quorum Model: Then choose the appropriate quorum model

  • Node Votes

By default, every node has a vote => May not be ideal for your specific HA / DR goals

Windows Server hotfix: http://support.microsoft.com/kb/2494036

Guidelines: http://msdn.microsoft.com/en-us/library/hh270280.aspx#RecommendedAdjustmentstoQuorumVoting

Odd number of votes

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