2V0-620 · Question #185
Which three statements are true regarding Fault Tolerance? (Choose three.)
The correct answer is A. Applications need to be continuously available to users. B. Applications without native clustering capabilities can be protected. C. Custom clustering solutions are complicated to configure and maintain. vSphere Fault Tolerance provides continuous availability for applications, including those lacking native clustering, but has strict vCPU limits and does not proactively prevent crashes.
Question
Which three statements are true regarding Fault Tolerance? (Choose three.)
Options
- AApplications need to be continuously available to users.
- BApplications without native clustering capabilities can be protected.
- CCustom clustering solutions are complicated to configure and maintain.
- DApplications that have 16 vCPUs are supported.
- EPrevents application crashes by analyzing the workload and correcting problems.
How the community answered
(42 responses)- A88% (37)
- D10% (4)
- E2% (1)
Why each option
vSphere Fault Tolerance provides continuous availability for applications, including those lacking native clustering, but has strict vCPU limits and does not proactively prevent crashes.
FT is designed specifically to ensure applications remain continuously available by maintaining a live shadow VM that takes over instantly if the primary fails, with no interruption to users.
FT protects any VM at the hypervisor level, meaning applications that do not have their own built-in clustering or HA capabilities can still be made fault tolerant without application changes.
One of FT's value propositions is that it eliminates the need for custom OS-level clustering solutions, which are notoriously complex to configure, test, and maintain.
vSphere FT has a maximum supported vCPU count per protected VM (8 vCPUs in vSphere 6.x), so VMs with 16 vCPUs are not eligible for FT protection.
FT does not analyze workloads to prevent crashes; it provides transparent failover after a failure occurs by instantly promoting the shadow VM, rather than correcting problems before they happen.
Concept tested: vSphere Fault Tolerance capabilities and limitations
Source: https://docs.vmware.com/en/VMware-vSphere/6.7/com.vmware.vsphere.avail.doc/GUID-57929CF8-5560-4F7C-9B9A-FBE21C3B6EC3.html
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