[usmannk]

> Technologists describe their systems as having “uptime” and measure it in “nines”, such as “We have five nines of uptime”, which means that a system has 99.999% uptime or, equivalently, about five minutes of downtime per year. Five nines is admirable in many circumstances and would be considered _disastrously_ below expectations for e.g. Google Search.

This seems wrong? 5 9s is probably a reasonable benchmark or even unattained goal for Google Search, right?

[bombcar]

Five nines is about six minutes of downtime a year.

Google search fails for me perhaps about that.

Now to get five nines for Google a bunch of parts below it have to be more redundant and reliable.

[resolutebat]

My favorite set of Google 9s is that Google Cloud Storage offers 11 9s (99.999999999%) of durability. The availability SLO is 99.95% though.

https://cloud.google.com/storage/docs/availability-durabilit...

https://cloud.google.com/storage/sla

[bombcar]

Hmm that durability means that after some period of time, all your data is gone.

Could be once a year lol

[ZephyrBlu]

You do realize that durability and availability are different properties of a system, right?

[pinkmuffinere]

Isn’t that explicitly what they’re pointing out?