Esx Replication Direct

The replication engine is built directly into the ESXi hypervisor. This agent tracks changed blocks on a VM’s disk and sends only those changes over the network using the Network File Copy (NFC) protocol.

| Feature | vSphere Replication | Array-Based Replication | vMotion / Backup | |---------|---------------------|--------------------------|------------------| | Granularity | Per VM | Per LUN/volume | Entire VM (vMotion) | | RPO | 5 min – 24 hr | Seconds (synchronous) | N/A | | Storage independence | Yes | No | Yes (vMotion) | | Orchestrated failover | No (requires SRM) | Yes (via SRA) | No | | Application consistency | Optional | Usually host-based | No | esx replication