Application Roll-over Facility, a solution developed by Bull, enables system administrators to easily move an application and its environment from one system to another in order to manage system workload issues, for maintenance purposes or in the event of hardware failures. The ARF facility provides low cost and easy-to-install application availability for the NovaScale Intensive and Universal range of servers in Linux environments.

Application Roll-over Facility (ARF) is based on a standard cluster architecture with at least two nodes (servers or partitions) sharing one or several disk sub-systems. In case of system failure or for maintenance or administration purposes, the services associated with an application or a node can be activated on the backup node.
ARF can also be proposed as a disaster recovery solution by using mirroring functionalities. Furthermore an attractive license price independent of the number of processors and partitions enables cost reduction.