For financial services firms operating in real-time environments, nightly tape data backups are proving to be insufficient in the event of a disaster. In the best-case scenario, recovery takes at least 48 hours. A better alternative is a high-availability system, which is designed to function as a parallel system that is ready to come online if the primary system fails. The three types of high-availability systems are:Electronic vaulting: Data is periodically backed up to a parallel database. Often it includes a parallel version of the main system that remains inactive until an emergency activates it.
Switch-over: Data is written to the backup database while it is simultaneously recorded in the primary database. The system is kept running with a live network connection, and is ready to receive requests if the primary system fails.
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