Glossary term
What is MTBF (Mean Time Between Failures)?
MTBF stands for Mean Time Between Failures.
Average time between failures. Example: Failing once a month = MTBF ≈ 720 hours.
Learn it properly · System DesignLesson 9: Availability and "The Nines" Explained“Five nines” is 26 seconds of downtime a month. What the nines really mean, why chained dependencies multiply away your availability while redundancy multiplies it back, and why fast recovery is often the cheapest nine you can buy.