Re: Press X to Doubt
5 nines has long been a gold standard for high-availability systems. But dont conflate design intent with real-world practicality and cost-efficiency.
S3’s design availability of 99.99% reflects the reality of running at massive scale, with global durability and geographic redundancy built in. That's something even the best on-premises solutions struggle to match without significant investment in infrastructure, personnel, and failover mechanisms. And that’s before considering patching, upgrades, hardware failures, and human error—all handled automatically or abstracted away in S3. Yes, the service credits may not feel generous, but the real value is in not needing them. Outages in S3 are rare and typically short-lived—compare that to diagnosing and resolving hardware or software issues in your own data center at 3 a.m.