SfZonalUpgradeMode type

Defines values for SfZonalUpgradeMode.
KnownSfZonalUpgradeMode can be used interchangeably with SfZonalUpgradeMode, this enum contains the known values that the service supports.

Known values supported by the service

Parallel: VMs under the node type are grouped into UDs and ignore the zone info in five UDs. This setting causes UDs across all zones to be upgraded at the same time. This deployment mode is faster for upgrades, we don't recommend it because it goes against the SDP guidelines, which state that the updates should be applied to one zone at a time.
Hierarchical: If this value is omitted or set to Hierarchical, VMs are grouped to reflect the zonal distribution in up to 15 UDs. Each of the three zones has five UDs. This ensures that the zones are updated one at a time, moving to next zone only after completing five UDs within the first zone. This update process is safer for the cluster and the user application.