Replication Scenarios

In this article

    Veeam Backup & Replication supports a number of replication scenarios. Depending on the scenario you are planning to use, different backup infrastructure components will be involved in the replication process. For more information on the components, see Backup Infrastructure for Replication.

    • On-host replication. Use this scenario if you want the source Microsoft Hyper-V host to process VM data. This can result in high CPU usage and network overhead on the host system.
    • Off-host replication. Use this scenario if the load on the source Microsoft Hyper-V is high and you want to shift VM data processing to a dedicated machine — an off-host backup proxy.

    Both these scenarios can be used when the source and target hosts are located in the same site (onsite replication) and in different sites (offsite replication). In both scenarios, you can replicate VM data directly (between hosts, or off-host proxy and target host) or over a pair of WAN accelerators.

    Note

    With offisite replication, you can also use technologies that help reduce the amount of replication traffic and streamline replica configuration: replica seeding and mapping, network mapping and re-IP rules.

    On-Host Replication

    The on-host replication scenario requires the following backup infrastructure components:

    Note

    Replication over WAN accelerators is supported only for snapshot replicas.

    During oh-host replication, all the necessary data transformations (such as data compression and block filtering) are performed on the source host.

    Replication Scenarios 

    Off-Host Replication

    The off-host replication scenario requires the following backup infrastructure components:

    Note

    Replication over WAN accelerators is supported only for snapshot replicas.

    During off-host replication, all the necessary data transformations (such as data compression and block filtering) are performed on off-host backup proxy, which helps reduce unwanted overhead on the source host.

    Replication Scenarios