Cianplan

Level 4: Reliability, security & cloud · L4.1 Availability math & SLOs

Error budgets and burn-rate alerts

Use an error budget to balance reliability and velocity.

11 min · Pro

What you take away

  • The error budget is the failure the SLO permits: (1 − SLO) × valid events in the window. It is a quantity you are meant to spend.

And 3 more inside the class, in Pro.

How the class is laid out

  1. The problem
  2. Spending speed is the thing to alert on
  3. Spending it on purpose
  4. Check your understanding