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- Fundamentals
See it break, then fix it
Build an architecture, send it a day of traffic and outages, and learn why it holds or fails. Free to start.
Availability and the nines
99.9 % availability allows 8.8 hours of downtime a year, 99.99 % only 53 minutes. Components in series multiply their availability, so a chain of three 99.9 % services is only about 99.7 % available.