Glossary
- Service Level Indicators (SLI)
- An SLI is a service level indicator—a carefully defined quantitative measure of
- some aspect of the level of service that is provided. Common SLIs include
- "request latency" or "error rate".
- Source of the definition
- Service Level Objective (SLO)
- An SLO is a service level objective: a target value or range of values for a
- service level that is measured by an SLI. A natural structure for SLOs is thus
- SLI ≤ target, or lower bound ≤ SLI ≤ upper bound.
- Source of the definition
- Service Level Agreement (SLA)
- SLAs are service level agreements: an explicit or implicit contract with your
- users that includes consequences of meeting (or missing) the SLOs they contain
- Source of the definition
- Error budget
- The headroom above a SLA. The acceptable amount of time a service may have
- issues. It is the result of identifying and agreeing on the risk tolerance of
- a service. Used to control the rate of releases.
- See a Presentation