© Peter A. Carter 2019
P. A. CarterPro SQL Server 2019 Administrationhttps://doi.org/10.1007/978-1-4842-5089-1_13

13. High Availability and Disaster Recovery Concepts

Peter A. Carter1 
(1)
SOUTHAMPTON, UK
 

In today’s 24×7 environments that are running mission-critical applications, businesses rely heavily on the availability of their data. Although servers and their software are generally reliable, there is always the risk of a hardware failure or a software bug, each of which could bring a server down. To mitigate these risks, business-critical applications often rely on redundant hardware to provide fault tolerance. If the primary system fails, then the application can automatically fail over to the redundant system. This is the underlying principle ...

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