4 ms·
If down for longer than 18 minutes then they missed "5 9s" availability (.3 hours / 3.5 years). Not that it is supposed to work that way.
by awscat 11y ago
If down for longer than 18 minutes then they missed "5 9s" availability (.3 hours / 3.5 years). Not that it is supposed to work that way.
- yeukhon 11y agoSoftware bug caused downtime vs infrastructure / hardware availability uptime to me are a different guarantee. I am pretty sure someone did something recently to DynamoDB.
- toomuchtodo 11y agoInfrastructure guy here doing this for 14 years. Downtime is downtime. You get a pass if its "scheduled maintenance" you've notified your customers about to allow them to be prepared, but if you silently perform maintenance and it goes to shit, you've just counted against your metrics.
- yeukhon 11y agoNope. I still disagree. No service can guarantee 99.999999% unless you discount software upgrade. You just cannot. If you think those nines include software upgrades, you are probably over optimistic.
- toomuchtodo 11y ago> No service can guarantee 99.999999% Don't advertise it if you can't offer it then. > If you think those nines include software upgrades, you are probably over optimistic. If you advertise a product with a specific SLA, and you can't meet that SLA, you're a liar. Don't try to blame the victim because of inaccurate/untruthful marketing or engineering.
- yeukhon 11y agoMaybe you are the one who needs to understand their SLA and fine print.
- antod 11y agoSLAs are just contractual thresholds for getting some specified redress if not met. They are not promises. Not meeting a SLA is not lying.
- toomuchtodo 11y agoI used SLA to communicate an advertised/marketed level of service. In this case, I agree, that SLA is the wrong term as there is no contractual agreement.