[vcf-midatlantic] How's Everyone Doing
telmnstr at 757.org
Fri Apr 24 11:35:28 EDT 2020
> I was recently having some weird intermittent problems where one server
> in my mini-rack was mysteriously hanging, usually waiting until I was
> out of town; the problems went away as soon as I replaced the very old
> batteries in the UPS, so presumably it was getting a brownout during the
> automatic testing cycle or something.
I used to work for a large music streaming provider and we had thousands
and thousand of servers. The data center would put out a notice that
they're going to do UPS maintenance or Switchgear maintenance... and
usually that night we would have maybe up to 20 servers have issues. Hard
hang or maybe a reboot. Meanwhile everything looked okay.
I'd imagine if you watched the sine wave under a microscope there was some
kind of glitch when the transfer happened, but not enough to effect most
of the systems.
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