failover

1. (computing) An automatic switch to a secondary system on failure of the primary system, such as a means for ensuring high availability of some critical resource (such as a computer system), involving a parallel backup system which is kept running at all times, so that, upon detected failure of the primary system, processing can be automatically shifted over to the backup.Examples: "Horizontal scaling gives you some failover and flexibility that you normally cannot get with only vertical scaling."; "while Tungsten is not heavily redundant as these systems, the ability of Lustre to support some failover can be leveraged to eliminate single points of failure."; "you have to make sure you can access it or ensure it can provide some failover," says Tarzey."countableuncountable