Explain the Use of Reference Workloads. VXRAIL-DESIGN Practice Questions (Page 3)

Questions 11–15

1. 11application · easy

   A VxRail architect is preparing a design document for a customer. The customer asks why the architect is using a reference workload for their ERP system instead of just measuring the current system. Which statement best explains the role of reference workloads in this context?

   • AReference workloads are only used when the customer does not have any existing performance data.
   • BReference workloads provide a validated baseline for common application types, which can be adjusted with customer-specific data to size the cluster.
   • CReference workloads are the final authority on node selection and cannot be modified.
   • DReference workloads are used to replace the need for any customer-specific performance data.
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2. 12foundation · easy

   Why is it important to validate reference workload assumptions with actual customer workloads?

   • ATo eliminate the need for any future capacity planning
   • BTo ensure the cluster design meets the real performance and capacity needs of the customer
   • CTo comply with a mandatory regulatory requirement
   • DTo reduce the number of nodes required, regardless of actual needs
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4. 13foundation · easy

   How does a designer use a reference workload to determine the number of nodes in a VxRail cluster?

   • ABy randomly selecting a number based on the number of applications
   • BBy using the minimum number of nodes required for vSAN, which is always three
   • CBy using the maximum number of nodes supported by VxRail regardless of workload
   • DBy comparing the workload's resource requirements (CPU, memory, storage) to the capacity of a single node and scaling up
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5. 14expert · hard

   A VxRail architect is designing a cluster for a customer's custom in-house application. The customer's workload has a unique I/O pattern that does not match any of the vendor's published reference workloads. The architect has used the closest reference workload as a baseline and sized the cluster accordingly. What is the most critical next step in the design process?

   • AIncrease the node count by 50% to provide a safety margin for the unknown workload characteristics.
   • BProceed with the design and order the hardware, as the reference workload provides a validated and safe baseline.
   • CPerform a proof-of-concept (PoC) or pilot deployment to validate the design against the actual customer workload.
   • DAsk the customer to modify their application to better match the reference workload's I/O pattern.
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6. 15application · medium

   A university is designing a VxRail cluster for a virtual desktop infrastructure (VDI) environment. The reference workload 'VDI - Knowledge Worker' specifies 10,000 IOPS, 100 MB/s throughput, 5 ms latency, and 10 TB capacity for 1,000 desktops. The university expects 1,500 desktops with the same per-desktop characteristics. How should the design team use the reference workload to size the cluster?

   • AScale the reference workload linearly to 1,500 desktops, resulting in 15,000 IOPS, 150 MB/s throughput, and 15 TB capacity.
   • BSelect a different reference workload that is designed for 1,500 desktops.
   • CUse the reference workload as-is because the per-desktop characteristics are the same.
   • DUse the reference workload but add one extra node to handle the additional 500 desktops.
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