
Reliability vs Availability: What's the Difference and Why It Matters
Your status page shows 99.9% uptime. Your customers are still complaining. That's the reliability vs. availability gap - and it trips up a lot of engineering teams. Availability is a number you can put on a status page. Reliability is whether your system actually does what users need it to do, consistently, over time. The two are related but not the same.

