SLO.
also: SLOs · service level objective · service level objectivesService level objective: the internal target for an SLI over a window, such as 99.9% of requests succeeding over 30 days.
the two-minute refresher
- Set it from user expectations, history and business cost, not at today's performance.
- Stricter than the SLA, so you notice trouble before customers can claim credits.
- 100% is the wrong target: it freezes change and costs a fortune.
- The gap between the SLO and 100% is the error budget.