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2V0-620 · Question #96

An administrator is tasked with performing a vMotion migration of a virtual machine. The virtual machine is configured as follows: - vSphere Flash Read Cache (vFRC) enabled - Is part of a…

The correct answer is B. Each ESXi host in the cluster supports one virtual flash resource. C. DRS treats powered-on virtual machines with Flash Read Cache as having a preferred affinity to. This question tests understanding of vSphere Flash Read Cache (vFRC) host resource configuration and how DRS handles affinity for VMs that use vFRC.

Section 4 – Deploy and Administer VMware Virtual Machines

Question

An administrator is tasked with performing a vMotion migration of a virtual machine. The virtual machine is configured as follows:

  • vSphere Flash Read Cache (vFRC) enabled
  • Is part of a Distributed Resource Cluster (DRS) Cluster

Which two statements are true? (Choose two.)

Options

  • AEach ESXi host in the cluster supports multiple virtual flash resources.
  • BEach ESXi host in the cluster supports one virtual flash resource.
  • CDRS treats powered-on virtual machines with Flash Read Cache as having a preferred affinity to
  • DDRS treats powered-on virtual machines with Flash Read Cache as having a required affinity to

How the community answered

(37 responses)
  • A
    5% (2)
  • B
    81% (30)
  • D
    14% (5)

Why each option

This question tests understanding of vSphere Flash Read Cache (vFRC) host resource configuration and how DRS handles affinity for VMs that use vFRC.

AEach ESXi host in the cluster supports multiple virtual flash resources.

Each ESXi host supports only one virtual flash resource, not multiple - the architecture consolidates all SSDs on a host into a single logical vFRC pool.

BEach ESXi host in the cluster supports one virtual flash resource.Correct

Each ESXi host supports exactly one virtual flash resource, which is a single logical resource that can be composed of one or more physical SSDs pooled together on that host. This is a fundamental architectural constraint of vFRC.

CDRS treats powered-on virtual machines with Flash Read Cache as having a preferred affinity toCorrect

DRS treats powered-on VMs with Flash Read Cache as having a preferred affinity to their current host, meaning DRS will try to keep them in place but can still migrate them if load balancing requires it - it does not impose a hard required affinity that would block migrations.

DDRS treats powered-on virtual machines with Flash Read Cache as having a required affinity to

DRS uses preferred affinity, not required affinity, for vFRC-enabled VMs - required affinity would prevent vMotion entirely, which is not the case since vMotion is supported with vFRC (with cache warm-up implications).

Concept tested: vSphere Flash Read Cache host architecture and DRS affinity behavior

Source: https://docs.vmware.com/en/VMware-vSphere/6.0/com.vmware.vsphere.storage.doc/GUID-6B40E5BB-5F70-4A90-A6D5-69CFF6BEAF1F.html

Topics

#vFlash Read Cache#vMotion#DRS affinity#virtual flash resource

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