Exam 3V0-624 topic 1 question 45 discussion

Actual exam question from VMware's 3V0-624

Question #: 45
Topic #: 1

A customer is virtualizing a mission-critical Microsoft SQL database and needs a configuration that provides optimal NUMA performance.
✑ There are two possible clusters that the database virtual machine could reside in Cluster A is vSphere 6.0 and Cluster B is vSphere 6.5.
✑ All ESXi hosts contain dual Intel Xeon E5-2650 processors (ie:2 socket, 10 cores per socket) and 256Gb RAM with vNUMA in its default configuration.
Given this scenario, which three statements are true? (Choose three.)

A. Enabling CPU Hot Add on a virtual machine will disable vNUMA.
B. Placing a 10 vCPU VM in Cluster A and configuring it with 2 Sockets and 5 Cores Per Socket will result in 2 vNUMA nodes.
C. Placing a 10 vCPU VM in Cluster B and configuring it with 2 Sockets and 5 Cores Per Socket will result in 2 vNUMA nodes.
D. Enabling Memory Hot Add on a virtual machine will disable vNUMA.
E. Placing the VM in Cluster B and configuring it with 5 Sockets and 2 Cores Per Socket will result in 1 vNUMA node.

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Suggested Answer: CDE 🗳️

by VCAPito at Oct. 19, 2019, 5:09 p.m.

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VCAPito

Highly Voted 5 years, 8 months ago

vSphere 6.5 introduced Autosizing of vNUMA, meaning that it will not follow the Cores per Socket configuration of the VM, but rather automatically calculate the vNUMA nodes (https://www.vmware.com/content/dam/digitalmarketing/vmware/en/pdf/solutions/sql-server-on-vmware-best-practices-guide.pdf) Therefore: A) True ("vNUMA is not exposed if the “CPU hot add” feature is enabled") B) True (a NUMA node per socket on 6.0) C) False (10 vCPU, a pNUMA node is 10 cores, therefore 6.5 will autosize to 1 vNUMA node) D) False (this is only for CPU hot add, not memory) E) True (10 vCPU, a pNUMA node is 10 cores, therefore 6.5 will autosize to 1 vNUMA node)

upvoted 33 times

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