NetApp HCI Real-Time Asynchronous Replication is not checkpoint-based but instead replicates continuously. This way data loss is kept to a minimum (seconds to minutes). The actual RPO is dependent on line latency that exists between the source and the destination site.
ONTAP SnapMirror is snapshot-based and has a minimum replication interval of 15 minutes.
NetApp, NetApp HCI [HCI]/1.8 P1, x86
Remote Replication Frequency, Disaster Recovery, Data Availability