Which of the following is the correct description of the main purpose of enabling the NUMA function?

Question

Options

• AMaximize the computing power of the physical host CPU
• BMaximize the reuse rate of physical machine memory
• COptimize the memory access performance of the virtual machine
• DMaximize the computing power of the vCPU of the virtual machine

• A
  11% (4)
• B
  5% (2)
• C
  81% (30)
• D
  3% (1)

Explanation

NUMA (Non-Uniform Memory Access) is a memory architecture where processors have faster access to their local memory than to memory attached to other processors. Enabling NUMA awareness for virtual machines allows the hypervisor to schedule a VM's vCPUs and memory allocations within the same physical NUMA node, minimizing costly cross-node memory accesses - making C correct.

A is wrong because NUMA is a memory topology feature, not a CPU computation booster; it does not increase raw CPU clock speed or core throughput. B is wrong because NUMA has nothing to do with memory reuse rates or efficiency of memory allocation; it addresses latency of memory access, not utilization. D is wrong because while NUMA scheduling does involve vCPU placement, the goal is lower memory latency, not increasing vCPU computational power - the vCPUs themselves run at the same speed regardless.

Memory tip: Let the acronym guide you - NUMA ends in "Memory Access," so its purpose is always about how fast memory is accessed, not how much CPU power or memory is available.

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