Global traffic routing
On This Lesson 4 topics
This lesson is planned. The outline below lists the topics it will cover. The full lesson has not been published yet.
In this lesson
route users to healthy regions.
Planned topics
- DNS routing: simple, cached by clients, so failover is slower than the TTL suggests.
- Global load balancers or anycast give faster, health-based steering.
- Health checks must test real dependencies, not only that the process is up.
- Avoid flapping with thresholds and manual override.
Draft outline details
Demonstration
a decision table: DNS failover, global load balancer, client-side retry across endpoints, with failover time, cost, and caveats.
Check your understanding
Why can DNS failover be slow?
Show answer
Resolvers and clients cache records beyond the TTL.
Practice
Apply this lesson with the module's lab, exercises and quiz.
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