Jane Street intentionally maintained its primary machine room directly inside its headquarters to safeguard intellectual property and enable staff to physically disconnect automated trading systems if necessary. This location subjected roughly 100 server cabinets and heavy network infrastructure to standard commercial office safety protocols. When dust from nearby cutting triggered the smoke alarm, the dry-pipe suppression system automatically pre-charged with pressurized water. Disaster was narrowly averted because the system required actual heat to burst the sprinkler head plugs before releasing water onto the machinery.
Key points
The trading firm chose close physical proximity for its infrastructure over using an exte…: The trading firm chose close physical proximity for its infrastructure over using an external third-party datacenter.
The two-stage fire suppression system primed overhead pipes with pressurized water follow…: The two-stage fire suppression system primed overhead pipes with pressurized water following the initial false alarm.
Heat-sensitive sprinkler plugs served as the final barrier preventing catastrophic water…: Heat-sensitive sprinkler plugs served as the final barrier preventing catastrophic water damage to the firm's primary operational hardware.
Sources checked by our analysis pipeline: 1
How a false smoke alarm almost drowned Jane Street's only NYC datacenter
AI disclosure: this story was written entirely by human hands, with AI doing proof-reading and light edits. Some tasteful imperfections kept to heighten Wabi-Sabi effect.
Everyone’s heard of how awesome Jane Street is. Fewer people have heard about the times something stupid nearly put it out of business and it was saved by grit and dumb luck. I was on the systems team for some of those. Jane Street didn’t do titles, and we on the systems team weren’t above getting our hands dirty. You could think of us as the firm’s blue-collar OCaml programmers: when something broke, we were the ones running through the corridors to fix it. Call this story a Star Trek: Lower Decks view of Jane Street.
For the longest time Jane Street insisted on having its machine room close to its trading floor. When it was 10 people it was cute. When it was 150 people it was starting to feel… odd. Part of the reason for this was intellectual property concern: they…
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