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Description
UNS4881b,V4 3BHE009949R0004 Failover technology for reliability and security
Hot backup is also described as a fail-over technique that ensures system reliability and safety by having a backup device or system ready to take over in the event of a device or system failure. Hot standby also describes the ability of a software or hardware component to connect to a server and run read-only queries in standby or recovery mode. In addition, it describes the ability of the server to continue answering queries while maintaining an open connection for users during a return to normal operation.
UNS4881b,V4-3BHE009949R0004
Examples of hot spare components include audio/video switches, network printers, computers, and hard drives, which are often considered redundant. Hot backup usually refers to an immediate backup of a critical component, without which the entire system would fail. Switching can be done manually or automatically, but usually involves some means of error detection. In addition, the hot standby component is designed to significantly reduce the time it takes for a failed system to return to normal operation, thus ensuring that 100% system availability is not provided.
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