An architect intends to use the Primary Level of Failures To Tolerate (PFTT) to calculate the minimum number of required hosts for a vSAN cluster.
Which calculation model should be used?
An architect intends to use the Primary Level of Failures To Tolerate (PFTT) to calculate the minimum number of required hosts for a vSAN cluster.
Which calculation model should be used?
The minimum number of hosts required for a vSAN cluster can be calculated with the formula 2 * PFTT + 1. However, to account for maintenance mode or extended availability while maintaining the desired PFTT, an adjustment is made to ensure there are enough nodes to tolerate the failures specified. Hence, the correct formula is 2 * PFTT + 1, but with an extra node usually added for maintenance purposes. Therefore, the calculation model should be 1 * PFTT + 2.
D. https://docs.vmware.com/en/VMware-vSphere/7.0/com.vmware.vsphere.vsan-planning.doc/GUID-57575456-0AD9-4655-9D6B-58509C1DF33C.html