[vcf-midatlantic] How's Everyone Doing
Mike Loewen
mloewen at cpumagic.scol.pa.us
Fri Apr 24 13:01:34 EDT 2020
On Fri, 24 Apr 2020, Ethan O'Toole via vcf-midatlantic wrote:
> 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.
At one point, I had a production server in the data center, an IBM RS6000
with redundant power supplies (2). The techs were moving systems to a
different power bus and unplugged one of the supplies: my system promptly shut
down. It turned out that my system required THREE power supplies before
redundancy was in effect. Oops.
Mike Loewen mloewen at cpumagic.scol.pa.us
Old Technology http://q7.neurotica.com/Oldtech/
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