VCP-VCF Administrator 2024 Question 90
Select 2An organization is planning to deploy a VMware Cloud Foundation stretched cluster across two data centers. Which requirements must be validated prior to deployment to ensure proper functionality?
- A
Each site must have at least one vCenter Server configured in Enhanced Linked Mode.
- B
The round-trip latency (RTT) between the two sites must not exceed 10 milliseconds.
- C
Each site must have a minimum of three fault domains configured.
- D
A dedicated witness host must be deployed in a third site or availability zone.
- E
All hosts in the stretched cluster must have identical hardware configurations.
Show answer and explanation
Correct answers: B, D
Explanation
Stretched clusters require specific network and infrastructure configurations to function correctly. The key requirements include maintaining a round-trip latency (RTT) of 10 milliseconds or less between the two sites to ensure proper synchronization and deploying a dedicated witness host in a third site or availability zone to prevent split-brain scenarios. These prerequisites are critical for the stability and reliability of the stretched cluster.
- A. Incorrect.
vCenter Server in Enhanced Linked Mode is not a requirement for deploying a stretched cluster. While it can improve management capabilities, it is not mandatory for the functionality of the stretched cluster.
- B. Correct.
The round-trip latency (RTT) between the two sites must not exceed 10 milliseconds as per VMware best practices for stretched clusters to ensure data consistency and performance.
- C. Incorrect.
A minimum of three fault domains is not required for a stretched cluster. VMware Cloud Foundation typically distributes resources across two fault domains (the two sites in the stretched cluster).
- D. Correct.
A dedicated witness host in a third site or availability zone is mandatory for quorum and to avoid split-brain scenarios in stretched clusters.
- E. Incorrect.
Identical hardware configurations across hosts in a stretched cluster are not strictly required, as long as the hosts meet the minimum requirements for the workload and VMware Cloud Foundation. However, having consistent hardware can improve manageability.