[PLUG] UPS shopping - attention suspend?

Keith Lofstrom keithl at keithl.com
Sat Dec 30 08:15:20 UTC 2023


On Fri, Dec 29, 2023 at 02:36:00AM -0800, Russell Senior wrote:

... UPS ...

> Does anyone have recent experience, either positive or negative, and/or
> any advice on replacements. I'd consider a used older model. 

Since computation equals dodopaddle (er "smart phone") for
most of My Fellow Americans, I suspect desktops with UPS
support will eventually become hard to find.   

----

I bought my most recent UPS from a Craigslist seller ...
and replaced the batteries with SLAs from Interstate All
Battery Center.  A Craigslist purchase trip is a chance
to visit neighborhoods I haven't seen before.

One of my long term goals is to play with a Tesla Powerwall.
I hope the batteries in those are better tended and last
longer than the batteries in a UPS.  Perhaps they will all
fail after Musk absconds to Mars with our warranty money.

----

A nearer term goal is to replace all the hard drives in the
house with Samsung terabyte SSDs.  My test machines suspend
to SSD in less than two seconds, and reboot in ten.  

I can imagine a multicore CPU and a Linux kernel that 
continuously copies checkpoint RAM images to SSD, so that
after power resumes, the machine "comes back" to a state 
resembling what I was working on when the lights went out.

In a well-designed suspend environment, I can "suspend my
thoughts" until the power comes back - and I am reminded
by my computer of what I was doing before the power glitch.
I would like a similar reminder process for other
interrupts - doorbell, phone calls, potty breaks, and
commands from She Who Must Be Obeyed.  Indeed, I would
like Linux tools that facilitate "timeouts" for exercise,
meditation, ordering my desk, whatever keeps me at maximum
productivity and happiness.

"Human interrupt and resume" is just another neglected 
aspect of larger processes that are only partly addressed
by a UPS.

Keith

-- 
Keith Lofstrom          keithl at keithl.com


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