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Posted by mbac32768 20 hours ago

A false smoke alarm almost drowned Jane Street's only NYC datacenter(michael.bacarella.com)
516 points | 248 commentspage 2
rhipitr 19 hours ago|
I thought these data centers have a way to pump in a gas that prevents fires? Remember touring a data center at some point that has this ability.
wombat-man 19 hours ago||
That's how the server room at my school worked. They said to get out of there if the alarm went off because the room would fill with some inert gas and you'd suffocate.
teeray 18 hours ago|||
I believe it's Halon, just like what's deployed for in-flight jet engine fires
bombcar 17 hours ago||
It was a primary weapon for the BofH.
bluedino 17 hours ago|||
They have masks in the room. They should, at least.
green-salt 18 hours ago|||
They stopped using it many places because the risk to people was greater than the equipment.
testplzignore 18 hours ago||
The gas is used first, then water as a fallback. I'm not sure if sprinklers are required by code in all data centers, but they would be in an office building setup like Jane Street's.
RomanKornev 13 hours ago||
Even though this happened in 2012, it's interesting that Jane Street is doubling down on compute and renting even more capacity from neoclouds. They are planning to expand 10x the amount of GPUs and are locking in tons of compute. On top of the $500M+ per MW of compute that they are paying Anthropic.
rag-hav 1 hour ago|
This is a trend in the wider algo trading market, not specific to Jane street
xhrpost 19 hours ago||
I specifically remember a TV commercial many years ago (15-20 maybe) that was trying to show the sophistication of the company with an anecdote of how when looking at some other company as a potential investment, considered if they used sprinklers in their data centers and determined that they did not. I could have sworn the company advertising was Jane Street.
projektfu 1 hour ago|
Close, it was Janus Mutual Funds, 26 years ago.

https://youtu.be/EYJLeuUjMlU?is=lzmEC-Q_bJ93FTgG

mvcosta91 19 hours ago||
TIL: wabi-sabi. I’ve been trying to find a way to express the beauty of imperfection in the age of AI, and this fits perfectly.
kridsdale1 19 hours ago||
It’s extremely common and cliche for people to use that term for imperfect stuff these days.
TechSquidTV 19 hours ago||
God dangit Bobby
liendolucas 18 hours ago||
Great post. I hope a big paycheck was given to the author for saving the DC and the company from disaster.

Many many years ago someone told me that your data is not safe if is not at least in 3 very different physical places. Today, I would probably add the requirement to be on different providers as well.

nunez 16 hours ago||
good to see you make front mbac; glad you're still holding it down!!!!

remember sandy? that was crazy

wolvoleo 19 hours ago||
How is it the only datacenter?

33 Thomas St is basically one huge datacenter, that's why it doesn't have any windows. https://en.wikipedia.org/wiki/33_Thomas_Street

advisedwang 19 hours ago||
It's Jane Street's only datacenter. not the only one in NYC. As they explain, they chose to specially locate their datacenter.
wolvoleo 18 hours ago|||
Yeah I didn't read the article in detail. It's the NYC that threw me off. And I didn't feel like it was that weird an concept, after all the real estate in NYC is super premium priced, not exactly prime datacenter country. I'm surprised there are many (like I said 33 Thomas St used to be just a phone exchange which used to be much bigger than they are now due to the mechanical tech involved).
maronato 19 hours ago|||
The headline is confusing. It’s Jane Street’s only data center in NYC, not NYC’s only data center.
stronglikedan 19 hours ago||
> The headline is confusing.

Nitpick, but the headline is not confusing at all, even though a couple of people are apparently confused. I suspect that is the fault of a hasty read through, not the headline itself.

xnorswap 1 hour ago||
Despite overall literacy increasing, reading comprehension has been falling for about a decade now.
dklsf 19 hours ago|||
This was pre-Hurricane Sandy, so before 2012. I'm guessing data centers have grown since then
kccqzy 19 hours ago|||
Jane Street’s only NYC data center. Not the only data center in general.
lelandfe 19 hours ago||
Work nearby, it looks just as evil in person.
wolvoleo 18 hours ago||
I think it looks cool. I used to work in buildings like this a lot. They're kinda cool. Dark, humming and clicking etc. I worked in telephony at a time when some (not many) of the old mechanical switches were still around and those buildings were especially spooky. It sounded like you were in the middle of a wild storm of crickets around 7pm when people finished dinner and started calling their friends. And all the little lights flashing all over (sometimes I used to keep the lights off for the cool effect if I could)

Some of them have half-floors for all the cable routing, where you can't really stand up.

I think this is why I like them. To me they're not just an ugly box but I always wonder what's inside.

tantalor 18 hours ago||
> the smoke alarm is wired to shut down the CRAC units

Why not just turn the CRAC back on?

> you don’t trust the automation unless there’s a big red-painted, mechanically connected lever you can pull to turn it off

Seems like this is one of those cases where you want to override the automation.

rainbowzootsuit 18 hours ago||
They'd be shutdown by a dry contact that may variously be coming from the VESDA (Very Early Smoke Detection Apparatus), or an internal smoke detector, or a duct mounted smoke detector. Not as simple as flipping an obvious switch on a front panel.
stockresearcher 14 hours ago|||
First, the guy probably wouldn't have keycard access to whatever room contained such a switch. Second, it's highly unlikely that the system would be able to cool the room fast enough to avoid hitting the temperature limit.

Incidentally, we actually had a fire in the office building I worked in long ago. The HVAC didn't shut down, and smoke started to come out of random vents throughout the building. It was chaos. And yet, plenty of workers wanted to finish and send that email they were working on, commit code and push it to the remote server, etc. What sticks with me most is the one guy, a very senior manager, running around yelling at people to get off their computers and get out of the building, because no job is ever worth your life.

Building fires are no joke. Get the F out.

freddealmeida 11 hours ago||
I did not know Jane Street had a datacenter in NYC. Must of had it a long time ago.
arjgoel30 19 hours ago|
Wow crazy I didn't know they had such simple systems
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