An administrator is planning to upgrade all ESXi hypervisors in a cluster hosting Files.

Anti-affinity rules ensure FSVMs are distributed across hosts for HA, but during a one-click hypervisor upgrade, these rules can prevent FSVMs from being migrated to other hosts when a host enters maintenance mode. Disabling the anti-affinity rules temporarily allows the upgrade to proceed by permitting FSVMs to reside on the same host during the migration process, ensuring a smooth and non-disruptive upgrade.

Exact Extract from Nutanix Documentation:

From the Nutanix Files Administration Guide (available on the Nutanix Portal):

“When performing a one-click hypervisor upgrade on ESXi hosts hosting Nutanix Files, temporarily disable the anti-affinity rules for FSVMs. This allows FSVMs to be migrated to other hosts during the upgrade process without violating placement constraints, ensuring a non-disruptive upgrade. Re-enable the anti-affinity rules after the upgrade is complete.”