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I'm also confused about how the racks would lose power. Surely they had UPSes.
by gsibble 11y ago
I'm also confused about how the racks would lose power. Surely they had UPSes.
- ams6110 11y agoUPSs don't always cover everything. There are systems that are considered critical that are on UPS, and others that are considered restartable that might not be. There are a lot of tradeoffs in a data center. Having full UPS and generator backup capacity for everything gets very expensive.
- technion 11y agoI have multiple experiences with high end DCs with dual UPS and diesel genset experiencing power fail. Once it involved fire alarms, which trigger safety shutdowns within a suite. The other involved a failed static switch panel - ie, the things that aren't mean to be able to fail.
- abrookewood 11y agoGenerally speaking, I'd recommend AGAINST running UPSes in racks that are managed by top-tier data centres. I've had way more trouble with UPSes misbehaving than I ever have with data centres losing power. EDIT: I'd also point out that 2 hours is a long time to be running on in-rack UPSes. I've usually seen them designed to withstand about an hour, but not much more.
- WatchDog 11y agoThe power outage was only brief, enough to halt the servers but, much less than the 2 hour outage window.