What is fault tolerance?
Fault tolerance describes a system’s ability to handle errors and outages without any loss of functionality. It is a critical capability, especially in cloud computing, where reliability and uptime are paramount.
For example, here’s a simple demonstration of comparative fault tolerance in the database layer. In the diagram below, Application 1 is connected to a single database instance. Application 2 is connected to two database instances — the primary database and a standby replica.
