NetEase Yanxuan Technology Product Team
Nov 14, 2022 · Operations
Quantifying Internet Service Availability: Classic Metrics and the New User‑Uptime Indicator
The article reviews classic availability metrics such as Success‑Ratio, Incident‑Ratio, MTTR/MTTF, Error‑Budget, and SLA/SLO, then introduces User‑Uptime—a per‑user success time proportion that ignores long idle periods—and its windowed variant, showing how it complements existing indicators for more user‑centric reliability insight.
ReliabilitySREavailability
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