In the case of a protection domain containing more than 500 VMs, what is the...

Migrating from legacy Protection Domains to modern Prism Central Protection Policies is a recommended practice for scaling DR management. However, large environments must account for architectural limits during this transition. A Nutanix cluster has specific maximum thresholds for the number of entities (VMs) that can be contained within a single Protection Domain, and similar limits exist for the initial " handoff " to Prism Central.

If a single legacy Protection Domain contains more than 500 VMs, attempting to migrate it as a single unit can lead to timeouts, metadata synchronization failures, and potential gaps in protection. To ensure that all VMs remain consistently protected during the migration, the first step is to " split " the existing large Protection Domain into multiple smaller, more manageable ones. For example, an administrator might split a 600-VM domain into three 200-VM domains. This reduction in " entity density " allows the Nutanix Cerebro and Prism Central services to process the migration tasks more efficiently without hitting resource contention or task timeout limits. Once the VMs are organized into these smaller groups, they can be systematically unlinked from the legacy domains and added to the new PC-based Protection Policies. This phased and controlled approach minimizes risk and ensures that a valid recovery point always exists for every VM throughout the entire migration lifecycle.