Volume Replicator (VVR) is data-replication software designed to contribute to an effective disaster recovery plan. VVR enables you to maintain a consistent copy of application data at one or more remote locations.
VVR is an option of Veritas Volume Manager (VxVM) that works as a fully integrated component of VxVM. VVR benefits from the robustness, ease of use, and high performance of VxVM, and at the same time, adds replication capability to VxVM. VVR can replicate existing VxVM configurations, and can be transparently configured while the application is active.
VVR is a separately licensed option of VxVM. You can start using VVR in a VxVM configuration by installing a valid VVR license.
VVR replicates the application writes on the volumes at the source location to one or more remote locations across any distance. It provides a consistent copy of application data at the remote locations. If a disaster occurs at the source location, you can use the copy of the application data at the remote location and restart the application at the remote location.
The host at the source location on which the application is running is known as the Primary host, and the host at the target location is known as the Secondary host. You can have up to 32 Secondary hosts in a VVR environment.
The volumes on the Primary host must be initially synchronized with the volumes on the Secondary host. VVR provides several methods to initialize the application data between the primary location and the remote location, such as using the network, using tape backup, and moving disks physically.