What configuration will best ensure continuous service availability in a failover clustering setup?

In a failover clustering setup, the aim is to ensure continuous service availability, particularly in the event of hardware or software failures. The configuration that best achieves this is the Active/Passive model.

In an Active/Passive configuration, one node is actively processing requests while the other node(s) remain in a standby state, ready to take over in case the active node fails. This setup ensures that there is minimal disruption during failovers. If the active node goes down, the passive node can seamlessly take over, maintaining service availability without user intervention or significant down-time.

While an Active/Active configuration allows all nodes to process requests simultaneously, it can create complexities in resource management and load balancing. This might not ensure continuous availability as effectively as the Active/Passive setup, particularly if there are issues like resource contention in the event of a node failure.

The Single Local Quorum and Shared Multiple Quorum configurations relate to how nodes make decisions in the cluster but do not directly influence the availability level like the Active/Passive configuration. They are more concerned with ensuring that the cluster can maintain a majority to function correctly, rather than directly ensuring that there is a backup ready to take over service provision.

Therefore, the Active/Passive configuration is optimal for ensuring continuous service