Re: 165 Halsey recurring power issues

[Eric Kuhnke <eric.kuhnke () gmail com>]

At which point one starts looking at the risk factors, if your whole
facility is "redundant", is the power feed coming in from two
geographically diverse substations, via diverse duct banks, into diverse
entry vaults, and diverse risers?

Doesn't eliminate the possibility of the entire building having some
catastrophic emergency, but if you really need to use a singular specific
geographic facility, can reduce the risk

The giant new electrical vault built under 6th Ave in Seattle in front of
the Westin Building back in 2016/2017 is an example of such diversity.



On Mon, Oct 23, 2023 at 7:08 PM Sean Donelan <sean () donelan com> wrote:

> On Mon, 23 Oct 2023, James Jun wrote:
> > "2N" generally means you're connected to completely different UPS
> system/complex and corresponding distribution systems for each of your
> circuit.  This is ideal configuration for most critical loads.
>
> If you are in a single facility, even one with 2N+2 backups, redundancy,
> diversity, etc., it still has shared fate.  Clouds with regions and zones
> on campuses in Eastern Virginia seem to come up with new and exciting ways
> to fail :-)
>
> https://en.wikipedia.org/wiki/Chaos_engineering