Your company is modernizing operations on Google Cloud using SRE principles. To decide when to halt or roll back a new release that consumes too much error-budget time, the team needs an internal reliability target such as "99.9% monthly availability." Which SRE concept should they define to serve this purpose?
A Service Level Objective (SLO) states the specific reliability target for a Service Level Indicator (SLI), for example 99.9% monthly availability or 200 ms 95th-percentile latency. The error budget represents how much the SLI may deviate from the SLO before corrective action (like halting releases) is required.
An SLI is only the metric being measured (for example, request success rate); it does not contain a target value. An SLA is a contractual agreement made with customers and is usually more lenient than internal SLOs. A postmortem is an analysis written after an incident, not a proactive reliability target.
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What is the difference between an SLO and an SLI?
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How does an SLA differ from an SLO?
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