An architect is expanding an existing private cloud infrastructure based on VMware Cloud Foundation (VCF). the requirement is to deploy two additional instances of VCF at two separate datacenters within the existing private cloud with minimal additional footprint. Datacenter A is 90 miles from the existing VCF fleet instance with a network round trip time of 90ms. Datacenter B is 120 miles from the existing VCF fleet instance with a network round trip time of 120ms. Which design decision would meet the requirement for this expansion?
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Reference / correct answer:
Deploy an additional VCF fleet in datacenter B and an additional VCF instance within the existing VCF fleet in datacenter A.
Most accepted answer: B. Deploy an additional VCF fleet in datacenter B and an additional VCF instance within the existing VCF fleet in datacenter A.
Community votes: A=1, B=4, C=2
Selected Answer: A A as in vcf 9 latency requirement increased to 300ms now upvoted 8 times
Selected Answer: B To minimal additional footprint, the ideal option would be to add two new VCF instances to the same Fleet, but it is necessary to ensure that the maximum latency between VCF instances in a VCF fleet is less than 100 ms (according to VCF 9 documentation, requirement VCF-NET-REQD-LAT-006). Therefore, the correct option is B: Deploy an additional VCF fleet in data center B (higher latency) and an additional VCF instance within the existing VCF fleet in data center A (latency below the recommended level). upvoted 3 times
Selected Answer: B With minimal additional footprint, so it must be B upvoted 3 times
Selected Answer: C VMware Cloud Foundation requires low latency for fleet operations. Typically, the recommendation is <50ms RTT between VCF instances in the same fleet. Your datacenters have 90ms and 120ms RTT, which exceeds the supported threshold for a single fleet. So I will go with option C. upvoted 3 times
Selected Answer: C The correct design decision is to deploy two additional VCF fleets, one for each VCF instance in datacenters A and B. VCF Stretched Cluster Latency Limit: The maximum supported network round-trip time (RTT) for the vSAN data path in a stretched cluster configuration (which allows a single VCF instance across multiple sites) is 5ms. upvoted 3 times