3V0-21.23 · Question #71
An architect is designing a new vSphere cluster. The requirement is to provide a total of 96 CPU cores and 1.5 TB RAM across all hosts. The following information has been provided: Two different…
The correct answer is B. The amount of capacity available for failover of virtual machines within the cluster E. The number of virtual machines that will be running within the cluster. Selecting between the two profiles affects how many hosts end up in the cluster (6× Profile 1 vs. 3× Profile 2), and that host count has direct operational consequences. B is correct because fewer hosts means a larger percentage of capacity is lost when one fails - with only 3…
Question
An architect is designing a new vSphere cluster. The requirement is to provide a total of 96 CPU cores and 1.5 TB RAM across all hosts. The following information has been provided:
Two different physical hardware profiles are available for the ESXi hosts in the cluster.
- Profile 1: 16 CPU cores and 256 GB RAM
- Profile 2: 32 CPU cores and 512 GB RAM
Profile 2 is twice as expensive to purchase as Profile 1. Which two aspects should the architect consider when selecting the hardware profile- (Choose two.)
Options
- AThe manufacturer and model of the CPUs in the hosts
- BThe amount of capacity available for failover of virtual machines within the cluster
- CThe downtime allowed for virtual machines that will be running within the cluster
- DThe cost to procure and maintain the hardware
- EThe number of virtual machines that will be running within the cluster
How the community answered
(24 responses)- A25% (6)
- B58% (14)
- C4% (1)
- D13% (3)
Explanation
Selecting between the two profiles affects how many hosts end up in the cluster (6× Profile 1 vs. 3× Profile 2), and that host count has direct operational consequences. B is correct because fewer hosts means a larger percentage of capacity is lost when one fails - with only 3 Profile 2 hosts, a single failure eliminates 33% of cluster capacity, severely limiting HA failover headroom compared to 6 Profile 1 hosts where a failure only removes ~17%. E is correct because the total VM count determines consolidation density per host; with fewer, larger hosts, more VMs are concentrated on each one, so a host failure impacts more workloads and DRS has less flexibility to balance load.
D is a deliberate trap: the question states Profile 2 costs twice as much, but you need half as many hosts (3 vs. 6), so total procurement cost is identical - cost is not a differentiating factor here. A is wrong because CPU manufacturer/model compatibility for vMotion is handled by EVC (Enhanced vMotion Compatibility), not by the profile selection decision itself. C is wrong because allowable VM downtime is a policy and SLA concern set independently of which hardware profile is chosen.
Memory tip: Ask yourself "What happens when one host dies?" - if you have fewer, bigger hosts, you lose a bigger slice of capacity (B) and more VMs go down at once (E). Those two consequences are always the core trade-off in a host-count decision.
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