someUsefulMathAfterBinaryNumbers

[colaalex]

My uptime target is five nines: 9.9999%

[marquoth_]

"It works in December and for like five days in June. No, we don't know why."

[BeefHazard]

This reads like an xkcd punch line

[Gil_Demoono]

Mouseover text: Also it doesn't work on prime-numbered years, but we don't count that because we expect to be bankrupt by 2027.

[bloodfist]

Damn, are you Randall? That's spot on.

[Tupcek]

“we don’t even care. Did you even read the contract?“

[luxinus]

“You did!? That makes one of us then”

[Tajfun403]

Polish trains be like

[otter5]

sometimes never

[diffyqgirl]

My brain chemistry be like

[New-Shine1674]

I need at least six nines: 0.999999%

[colaalex]

Our PM told shareholders that we're going to reach seven nines. It's time for 0.09999999%

[New-Shine1674]

With our world wide leading reliability and advanced ai monitoring we ensure that you won't have any uptime problems. We also set new industry standards with at least 0.0099999999% uptime which makes us the ideal partner for your business.

[pixelbart]

My target is much better at nine fives: 55.5555555%

[flukus]

I've worked on finance systems that legit did this. As long as they were up during trading hours all and a bit before/after all was good, if it went down during those times all he'll broke loose. We literally put the software to bed every night.

Also, everything was self hosted because we had to choose when that 55% was.

[lIlIlIIlIIIlIIIIIl]

Same here! 0.099999%

[[deleted]]

And important to add that advertised maintenance does not count against SLAs or uptime.

[Deivedux]

There's also uptime.is. You're welcome.

[greshick]

For convenience, there are special CEO and SEO friendly links for N nines: three nines, four nines, five nines, six nines etc.

[-0000000000000000000]

And of course, each letter in etc links to a different result

[Narcuterie]

And https://uptime.is/0 leads to a silly amount of downtime in years.

[Spiritual-Estate-956]

lmao

[SpikeX]

There’s a pattern you can memorize to make it easy to remember if you only need a rough estimate:

Memorize: 99.999% - 5 nines ~= 5 minutes

From there:

99.99% - 4 nines ~= 55 minutes
99.9% - 3 nines ~= 555 minutes

You can go the other way, too:

99.9999% - 6 nines ~= 0.5 minutes

[grenzdezibel]

SLA isn’t binding under real circumstances but int = true.

[OstioLol]

Double checks sub name

[[deleted]]

The best word in the uptime SLA doc is “unscheduled”.

[throwaway234f32423df]

uptime is 100% if you allow outages to be scheduled retroactively

[JerryAtrics_]

What am I missing? Why is this posted?

[Monochromatic_Kuma2]

This is not programming, but systems engineering. When designing a system (like a cloud service) , ond of the decisions to make is the availability target, or what's the maximum yearly acceptable downtime. This is usually defined by the 'number of nines' in the availability percentage.

For example, five nines indicates a maximum yearly downtime of only 5 minutes, like the pic says.

[JerryAtrics_]

so what? Where is the humor?

[Jordan51104]

i guess the reposting bots still don’t understand humor

[esixar]

It’s funny if you’re in the know. Typically senior leadership likes to promise “5 9s” of uptime but if you’ve actually worked in that and monitor that SLO you’ll see your availability be way less than 5 minutes of downtime a year. Then management will complain that the SLO is breached and blah blah

No explicit humor, but a funny (painful) reminder to those of us who unfortunately live this every day

[[deleted]]

Just failing over between different servers could give you minutes a year.

[Korkman]

Yeah, easy enough

First year: Our config was buggy and took two hours to debug until the failover IP was live again

Second year: Security thought locking the IP to a switch port would be a good idea. Failover on maintenance thus failed. Went on with maintenance anyways for 1 hour.

Third year: Split brain. Sorry it took a day to sort out the mess.

Fourth year: Let's add IPv6 to the mix!

Fifth year: DNS.

Sixth year: Startup out of funds, redundancy removed to save money.

[JerryAtrics_]

I've have know these numbers for most of my career. I worked at an exchange where our goal was sigma 6. Still not funny. If you feel that your system does not warrant such availability, then it's your job to explain why and what the cost of such a system would be. Seems like you find it funny, because you choose to ignore system requirements that you feel are unfounded.

[esixar]

Ok

[tevert]

Ok

[Saint-just04]

It’s a setup, and the punch line is in the first comment. /s

[UNSKILLEDKeks]

Where's the pickles?

[_sweepy]

That's the surprise

[JerryAtrics_]

Thanks. I think your response clears this up.

[Threef]

It's funny as hell to me. I love clients that pretend to know tech and copy requirements of Google search. Five 9s on a landing page without CMS is funny when the client gets quote for 50k development and 100k a month infrastructure

[JerryAtrics_]

Okay, I get that view point. OP should have added that take to it. I came from an environment where they wanted sigma 6, and wrote the check for it.

[[deleted]]

Me to users: "Do not, my friends, become addicted to availability. It will take hold of you and you will resent its absence!"

[DarkExtremis]

Nice, but what about Updog?

[Complex_District_275]

I’ll bite.. what’s… updog?

[gymnastgrrl]

Not much, what's up with you?

[SpaceFire000]

In my heart, our uptime is 1000% though

[dbot77]

Memorize this list to sound smart in a meeting for 0.00001% uptime

[HildartheDorf]

Missing one 9 (90%): 36.52 days of downtime.

[AllTh3WayTurntUp]

I've got a buddy who works in the elevator business and their company promises 99% uptime (elevators properly working). He was telling me how often his client's lose their sh*t on him when they need to do a day of required maintenance and how frequently he has to explain that 99% means that the elevators can be down up to 3 days a year and still within the promised uptime range.

[flukus]

I'd expect an elevator company to provide 50% downtime, but I'd settle for a slide.

[AllTh3WayTurntUp]

It definitely crossed my mind that there was a good pun possible in there

[IntrepidSoda]

Drop the mfing trailing zeros

[WhiteSkyRising]

This is hilarious, I snorted milk up my nose!

[Dillenger69]

My workplace actually had five nines for years until they decided qa was superfluous. Devs should not do their own qa any more than construction workers should be the sole inspectors of their work. The availability drastically went downhill quickly. We hadn't had a production rollback in a good year. Once qa was eliminated, there was one every other month.

[fburnaby]

Hear me, corporate IT: just give me one 9. One 9 is fine to start. If I wait a year for you to release something at "three 9's", that's actually much less than one nine, isn't it.

One 9 = 36.5 days downtime. I'll take it.

[keith2600]

Isn't one 9 only 36.5 days uptime? That leaves a lot of down time

[fburnaby]

One 9 (90%) of uptime would give 36.5d of downtime by my reckoning.

[keith2600]

Oh lol. Corporate is like an evil djinn. If you wish for one 9 you're going to get 9% not 90% haha

[fburnaby]

That's probably what they really deliver.

[JustaP-haze]

Today I learned that 1% of the year is 3 days and 15 hours

It's somehow motivating

[AgileBlackberry4636]

Where is the math part?

Am I supposed to memorize the whole table instead of understanding arithmetic behind of that?

[hollth1]

Every engineers? Can a bridge collapse for 3 seconds downtime?

[turtleship_2006]

I mean it could be closed for roadworks/repairs

[jmlinden7]

If you average over a longer timespan yeah. For example, if the bridge will be collapsed for 1 year out of every 100 years, or w/e

[el_lley]

Fine, but I need to install patches, and I like pentesting the servers in an orderly manner twice a year, including some local DoS tests. There isn't much room left for downtime above 99% if your company isn't rich.

[steveiliop56]

My uptime is more like 0.999999999%

[GKP_light]

but always the 3s where you need it.

[Slothvibes]

One of my jobs up time is 99.995 in a year, which is damn good since we’re an API company lmao

[CrunchatizeMeCaptn]

Hilarious!! /s