4 / 7 SLA, SLO, SLI & Availability Math

One Row Is Wrong

A team configures multiwindow burn rate alerts for a 99.9 percent SLO measured over 30 days. Budget consumed at the moment an alert fires is

budget consumed=burn rate×alert windowSLO period\text{budget consumed} = \frac{\text{burn rate} \times \text{alert window}}{\text{SLO period}}

Four rows go into the config, each written down with the budget its author expected it to fire at. One of those figures does not follow from the formula. Which row is wrong?

A

Burn rate 1 over a 3 day window, expected to fire at 10 percent

B

Burn rate 14.4 over a 1 hour window, expected to fire at 2 percent of the budget

C

Burn rate 6 over a 6 hour window, expected to fire at 5 percent

D

Burn rate 3 over a 12 hour window, expected to fire at 15 percent