Nutanix Certified Associate Practice Exam

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What is required to ensure a Nutanix cluster maintains reserve capacity for failover if a single node fails?

Enable HA in Prism Element
Enable Shadow Clones
Make one node a hot spare
Reserve resources in Cluster Settings

The correct answer is: Enable HA in Prism Element

To maintain reserve capacity for failover in a Nutanix cluster when a single node fails, enabling High Availability (HA) in Prism Element is crucial. When HA is activated, the system is designed to automatically manage resources and ensure that workload continuity is maintained in the event of a node failure. This functionality allows the cluster to quickly reassign workloads from the failed node to the remaining healthy nodes, ensuring minimal disruption and maximizing uptime. Enabling HA effectively utilizes the remaining nodes' resources to handle the workloads, thereby keeping enough reserve capacity within the cluster to handle unexpected node failures. This design principle is fundamental in achieving high availability and resilience in a hyper-converged infrastructure. Other methods, such as configuring hot spares or adjusting cluster settings, do not inherently provide the failover functionality that HA accomplishes. While reserving resources and designating spare nodes can be part of a broader strategy for maintaining high availability, the primary and most direct mechanism for ensuring failover capacity is through the activation of HA in the Nutanix management interface.