This is an archive version of the document. To get the most up-to-date information, see the current version.Off-Host Replication
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Off-host replication can be used when you replicate VMs both over LAN and the WAN. In contrast to on-host replication, this scenario takes an additional replication infrastructure component – off-host backup proxy.
The off-host replication scenario requires the following replication infrastructure components:
- Source host.
- Off-host backup proxy. The off-host backup proxy must be deployed in the source site and must have access to the source host and the target host. The source-side Data Mover Service runs on the off-host backup proxy.
- Target host. The target-side Data Mover Service runs on the target host.
- [For snapshot replica] Backup repository for storing replica metadata.
- [Optional] WAN accelerators.
During off-host replication, all the necessary data transformations (such as compression and block filtering) are performed on off-host backup proxy which helps reduce unwanted overhead on the source Hyper-V host.
