How does the system behave if the network cannot sustain the data change rate required...

Nutanix NearSync replication is designed to provide very low RPOs (1 to 15 minutes) by using " Lightweight Snapshots " (LWS). To maintain a 1-minute RPO, the system requires sufficient network bandwidth to transfer the delta changes before the next snapshot interval begins.

If the network bandwidth is insufficient or if the VM ' s data change rate (churn) suddenly spikes beyond the network ' s capacity to keep up, the system is designed to prioritize protection over RPO strictness. In this scenario, the Nutanix Cerebro service will automatically " downshift " the replication from NearSync to standard Asynchronous replication mode. This transition allows the system to use more traditional, robust snapshots that can handle longer transfer times, ensuring that the VM remains protected, even if the RPO temporarily increases to an hourly interval. Once the network conditions improve or the data churn decreases, the system will automatically attempt to " upshift " back to the 1-minute NearSync schedule. This behavior prevents application performance issues like write-pausing (Option D) or I/O degradation (Option A) and avoids unnecessary failovers (Option C), providing a resilient and adaptive data protection mechanism.