How is the Quorum mechanism determined within a HA Cluster?

The determination of the Quorum mechanism in a High Availability (HA) Cluster is primarily achieved through a voting algorithm. In HA Clusters, Quorum is essential to ensure that the system can maintain a consistent state and avoid split-brain scenarios, where two nodes might operate independently without communicating.

The voting algorithm works by assigning votes to each node in the cluster. For the cluster to maintain its operational integrity, a majority of these votes must agree on a leader or on the state of the cluster. This process helps to ascertain which nodes are functional and can participate in the cluster's operations. In the event of a node failure, the algorithm assesses the remaining nodes' votes, allowing the cluster to continue functioning without interruptions or conflicts.

The other options do not pertain to the Quorum mechanism's primary function. User login attempts relate to authentication processes and do not influence the Quorum. Network stability, while relevant for overall cluster performance, does not directly indicate how many votes are present or how decisions are made. Memory performance metrics could be used for performance assessments but have no role in determining Quorum. Thus, the voting algorithm is the correct choice, as it is a foundational aspect of how HA Clusters operate to ensure reliability and consistency.