Ooh, I didn’t know that someone had developed a mechanism to move issues and PRs.

I remember commenting on the fact that while it’s easy to move the source repo itself from location to location, as git makes that easy and self-contained, issues and PRs didn’t enjoy that.

Yeah, that’s probably a fair answer for some folks and systems. Depends on what your system is doing, your risk tolerance, and what money you’re willing to put into the thing.

If I didn’t have a backup system in place, say, that’d be much higher on my list than trying to ensure power isn’t cut off unexpectedly during power outages.

I agree that it’s less-critical than it was at one point. Any modern filesystem, including ext4 and btrfs, isn’t at risk of filesystem-level corruption, and a DBMS like PostgreSQL or MySQL should handle it at an application level. That being said, there is still other software out there that may take issue with being interrupted. Doing an apt upgrade is not guaranteed to handle power loss cleanly, for example. And I’m not too sanguine about hardware not being bricked if I lose power during an fwupd updating the firmware on attached hardware. Maybe a given piece of hardware has a safe, atomic upgrade procedure…and maybe it doesn’t.

That does also mean, if there’s no power backup at all, that one won’t have the system available for the duration of the outage. That may be no big deal, or might be a real pain.

Yeah, I listed it as one possibility, maybe the best I can think of, but also why I’ve got some issues with that route, why it wouldn’t be my preferred route. Maybe it is the best generally available right now.

The “just use a UPS plus a second system” route makes a lot of sense with diesel generator systems, because there the hardware physically cannot come up to speed in time. A generator cannot start in 10ms, so you need a flywheel or battery or some other kind of energy-storage system in place to bridge the gap…but that shouldn’t be a fundamental constraint on those home large-battery backup systems. They don’t have to be equipped with an inverter able to come online in 10ms…but they could. In the generator scenario, it’s simply not an option.

I’d like to, if possible, have the computer have a “unified” view of all of the backing storage systems. In the generator case, the “time remaining” is a function of the fuel in the tank, and I’m pretty sure that it’s not uncommon for someone to be able to have some kind of secondary storage that couldn’t be measured; I remember reading about a New Orleans employee in Hurricane Katrina that stayed behind to keep the datacenter functioning mostly hauling drums of diesel up the stairs to the generator. But that’s not really a fundamental issue with those battery backup systems, not unless someone is planning on hauling more batteries in.

If one gets a UPS and then backs it with a battery backup system, then there are two sets of batteries — one often lead-acid, with a shorter lifespan — and multiple inverters and battery charge controllers in multiple layers in the system. That’s not the end of the world, a “throw some extra money at it” issue, but one is having to get redundant hardware.

I’ll add one other point that might affect people running low-power servers, which I believe some people here are running for low-compute-load stuff like home automation: my past experience is that low-end, low power computers often have (inexpensive) power supplies that are especially intolerant of wall power issues. I have had multiple consumer broadband routers and switches that have gotten into a wonky, manual-reboot-requiring state after brownouts or power loss, even when other computers in the house continued to function without issue. I would guess that Raspberry Pi-class machines might have power supplies vulnerable to this. I suppose that for devices with standard barrel connectors and voltage levels, one could probably find a more-expensive power supply that can handle dirtier power.

If you run some form of backup power system that powers them, have you had issues with Raspberry Pis or consumer internet routers after power outages?

While laptop batteries may not have aged well, especially if they’re left discharged, one other nice perk is that laptops effectively have an integrated UPS.

Three-letter words that can be typed with one hand, since I have to type them frequently.

$ egrep "^([qwertasdfgzxcvb]{3}|[yuiophjkllnm]{3})$" /usr/share/dict/words