Fault-Tolerance

What is Fault-Tolerance?

Fault-tolerance is the property that enables a system to continue operating properly though there are some failures inside of it.

The more faults a system can tolerate without failing, the more fault-tolerant it is.

Fault-tolerance is an important feature of distrubuted systems.

How to make microservices fault-tolerant?

1. Circuit Breaker

Circuit breakers can prevent repeated requests to a failing service, allowing it time to recover.

2. Timeout

Timeouts can prevent a service from waiting too long for a response from another service. Fail fast is better than waiting indefinitely.

3. Load Balancing

Use load balancers to distribute incoming requests evenly across multiple instances of a microservice. Load balancers can also detect and avoid routing traffic to unhealthy instances.