5V0-21.21 · Question #15
In a vSAN stretched cluster, which value must be set in the vSAN policy if there is no requirement for data mirroring across sites?
The correct answer is D. PFTT = 0. Primary level of failures to tolerate (PFTT). For stretched clusters, PFTT defines the number of site failures that a virtual machine object can tolerate. For a stretched cluster, only a value of 0 or Secondary level of failures to tolerate (SFTT). For stretched clusters, SFTT…
Question
In a vSAN stretched cluster, which value must be set in the vSAN policy if there is no requirement for data mirroring across sites?
Options
- ASFTT = 0
- BSFTT = 1
- CPFTT = 1
- DPFTT = 0
How the community answered
(41 responses)- A7% (3)
- B12% (5)
- C2% (1)
- D78% (32)
Explanation
Primary level of failures to tolerate (PFTT). For stretched clusters, PFTT defines the number of site failures that a virtual machine object can tolerate. For a stretched cluster, only a value of 0 or Secondary level of failures to tolerate (SFTT). For stretched clusters, SFTT defines the number of additional host failures that the object can tolerate after the number of site failures defined by PFTT is reached. If PFTT = 1 and SFTT = 2, and one site is unavailable, then the cluster can tolerate two additional host failures. The default value is 0, and the maximum value is 3. So data mirroring across sites = PFTT https://docs.vmware.com/en/VMware-vSphere/7.0/com.vmware.vsphere.vsan- planning.doc/GUID-1BDC7194-67A7-4E7C-BF3A-3A0A32AEECA9.html
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