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submitted 1 week ago by 0x0@lemmy.zip to c/technology@lemmy.zip
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[-] cyberduck@aussie.zone 34 points 1 week ago

I'm stupid what does zero nines uptime mean?

[-] 0x0@lemmy.zip 64 points 1 week ago

These services measure their uptimes in number of nines, the more the better.

[-] dohpaz42@lemmy.world 47 points 1 week ago

Sometimes the humorous term "nine fives" (55.5555555%) is used to contrast with "five nines" (99.999%),[18][19][20] though this is not an actual goal….

Maybe Microsoft misunderstood the assignment, and thought this was a goal. At their current rate, it’s certainly more achievable than the more traditional “five nines”.

As an aside, I love how the following is preferences as “casual”, and then the author starts arguing semantics:

Similarly, percentages ending in a 5 have conventional names, traditionally the number of nines, then "five", so 99.95% is "three nines five", abbreviated 3N5.[13][14] This is casually referred to as "three and a half nines",[15] but this is incorrect….

[-] Hazel@piefed.blahaj.zone 14 points 1 week ago

the author starts arguing semantics

Legendary levels of pedantry, gave me a real good chuckle 🤭

[-] Tiresia@slrpnk.net 1 points 1 week ago

Being casual does not shield you from your mathematical incorrectness.

[-] cyberduck@aussie.zone 8 points 1 week ago

Ah makes sense. Thanks

[-] ByteJunk@lemmy.world 30 points 1 week ago* (last edited 1 week ago)

When contracting a service, usually there are clauses that specify that it needs to be fully working and available x% of time, and compensation may be due in case this goal isn't met.

Let's say GitHub was down for 1 full day in the last year, that's 99.7% availability. That's "2 nines", but sometimes people might say "2 nines five", meaning "better than 99.5% uptime".

I'd say that the expectation for a high availability service nowadays is "5 nines": 99.999% uptime. That's around 5 minutes of downtime in a full year. This kind of performance from a site like GitHub is just unacceptable...

this post was submitted on 04 May 2026
773 points (98.6% liked)

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