[vcf-midatlantic] How's Everyone Doing

Ethan O'Toole 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.

Pretty wild.

     - Ethan

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