This is an archive version of the document. To get the most up-to-date information, see the current version.Replication Data Paths
VM replication can run over two data paths:
- Direct data path
- Via a pair of WAN accelerators
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Replication via WAN accelerators is supported only for a snapshot replica. |
Direct Data Path
Replication over a direct data path is recommended if you replicate VMs over LAN or fast connections. In this case, Veeam Backup & Replication transports data directly from the source host or off-host backup proxy to the target host.
Replication via WAN Accelerators
If you have a weak WAN link, you can replicate VM data via a pair of WAN accelerators. WAN accelerators provide advanced technologies to optimize VM data transfer:
- Global data caching and deduplication
- Resume on disconnect for uninterrupted data transfer
WAN accelerators add a new layer in the backup infrastructure — a layer between the source-side Veeam Data Mover Service and the target-side Veeam Data Mover Service. The data flow goes from the source host or off-host backup proxy via a pair of WAN accelerators to the target host.
To replicate VMs via WAN accelerators, you must deploy a WAN accelerator at each end of a WAN link:
- Source WAN accelerator must be deployed in the source site. The source WAN accelerator must have access to the backup server, source host or off-host backup proxy and target WAN accelerator.
- Target WAN accelerator must be deployed in the target site. The target WAN accelerator must have access to the backup server, source WAN accelerator and target host.
