While that is true of heat pump technology in total, I have not seen any heat pump water heaters in the US that work below freezing. One example: my Rheem manual says it will work down to about 42F / 5C. Below that, it uses resistive heating elements.
But I’m sure it’s coming eventually to water heaters.
Often known as the “Gartner Hype Cycle”
GlusterFS is (was) really cool, but I would not set up a new instance. It used to have significant support and development from RedHat, but they decided to halt their work on it, and focus on Ceph.
GlusterFS is getting a few slow updates from some alternate developers, but I would only count on that being fixes for current installations.
For a certain very specific usage of the word “better”
Yes, many bad ideas are possible to implement. At least temporarily. Until the next cleanup process figures out how to remove cadvisor dir regardless of file contents. Or the next OS release turns /tmp into a ram disk. Or… or… or…
Yes, it’s a fun academic exercise to think through possible mitigations. And in the end, it will still be dumb to keep this in /tmp
Why wouldn’t changing to permissions keep the file from being deleted by the internal process?
That’s like keeping your lunch laying outside on the sidewalk, getting stepped on by people and destroyed, and then wondering if your lunch would be safer if you put it in a stronger bag (but still left it on the sidewalk).
Don’t leave your lunch outside laying on the sidewalk, regardless of what you might do to “protect” it. Don’t keep important files in /tmp
I would wonder about leaching. Modern lead-free plumbing solder is safe for drinking water, but is silphos considered safe for drinking water?
I though they’re why the desert racists box spread so far to the north.