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failover Last modified: Thursday, October 07, 2004
A backup operation that automatically switches to a standby database, server or network if the primary system fails or is temporarily shut down for servicing. Failover is an important fault tolerance function of mission-critical systems that rely on constant accessibility. Failover automatically and transparently to the user redirects requests from the failed or down system to the backup system that mimics the operations of the primary system.
How Failover Works on the Cisco Secure PIX Firewall Includes replicating the PIX configuration, failover monitoring and interface testing. Getting Failover Right It's not easy, but with a little planning and testing, host bus adapter and RAID failover can be done without hurting performance.	Related Categories Databases Network Management Networks Servers Related Terms clustering data mirroring disk mirroring fail soft fault tolerance IP load balancing network-attached storage server farm server mirroring TCP/IP