
Explanation:
Box 1 = max value
Box 2 = 20
Explanation:
Use max for platformFaultDomainCount
2 or 3 is max value, depending on which region you are in.
Use 20 for platformUpdateDomainCount
Increasing the update domain (platformUpdateDomainCount) helps with capacity and availability planning when the platform reboots nodes. A higher number for the pool (20 is max) means that fewer of their nodes in any given availability set would be rebooted at once.
References:
https://www.itprotoday.com/microsoft-azure/check-if-azure-region-supports-2-or-3-fault-domains-managed- disks
https://github.com/Azure/acs-engine/issues/1030