What Is The Difference Between SLI, SLO, And SLA, And Can You Give Simple Examples?

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What Is The Difference Between SLI, SLO, And SLA, And Can You Give Simple Examples?

SLIs are the raw metrics measuring service performance (like latency or uptime); SLOs are the internal target values for those metrics (e.g. aiming for 99.9% uptime); and SLAs are formal agreements with customers that those targets will be met, often with penalties if they aren’t.

These three acronyms – SLI, SLO, and SLA – are fundamental in site reliability engineering (SRE) and IT service management, defining how we measure and guarantee the quality of a service.

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