solrize

It’s known that BQP (the stuff that a quantum computer can compute in probabilistic polynomial time) is a subset (maybe not a proper one) of PSPACE. I’m pretty sure the same thing applies to QR (the stuff computable on a quantum turing machine) vs R (same for a classical Turing machine). So anything that a quantum computer can do, a classical computer can also do, though the classical computer might take exponentially longer.

Usually though, this type of “proof” is supposed to be “concise” (its size is bounded by a polynomial over the size of the problem instance). The classical complexity classs is called NP, non-deterministic polynomial time, with P=?NP being the best known open problem in complexity.

For quantum computers, the analog of NP is called QMA (Quantum Merlin Arthur). QMA is at least as large as BQP, and it’s unknown whether BQP is contained in NP, so the answer to your question is “nobody knows for sure”, in the sense of having a mathematical proof. I think it’s generally believed though that BQP is larger than P (that’s why there’s so much hype about quantum computers), that NP is larger than P, and so on.

en.wikipedia.org/wiki/QMA en.wikipedia.org/wiki/BQP

IDK really. I’m repeating what I saw someplace years ago. I would say do a real RAID if you manage it. Maybe RAID 5 on 3 drives.

While I don’t exactly intend to run RAID, I ended up choosing nas drives for the 24/7 intended usage,

The purpose of a NAS drive is to be LESS reliable than a regular drive, not more reliable. Explanation: if a regular drive gets a read error on a block, it will retry for quite a while before giving up. The host, meanwhile, has to wait for the data to be retrieved if the retries work. That’s all it can really do, wait and hope. Meanwhile, the waiting slows the application down.

A NAS drive instead will fail once or twice, then give up immediately, since it knows that it’s in a RAID system and that the data is also present on other disks. The RAID then puts the data together from the other drives and gets it to the host, logging the error. It will also hopefully mark the bad block on the drive with the read failure, and rewrite the recovered data to a spare sector. So this is faster than all the retries even though the drive that had the bad block gives up on it rather than attempting recovery by repeated reads.

So if you buy NAS drives, put them in a RAID.

Drives are currently around 2x as expensive as a year or so ago but they are available if you can afford them. I guess that’s better than shortages where they’re hard to find even if you can pay. We’ve had that before too.

I like to think the current situation will settle out. Who knows though. Drive space is still way less expensive than in 2010 or anything like that.

I think ID for new customers is widespread now because of the growth of scams. I enrolled at Porkbun from the US a number of years ago without ID (before they started asking for it) and they haven’t asked me for it retroactively, so I don’t think it’s required, it’s just something they do as an anti-scam measure. I’ve never tried for a UK or other national domain from them.

Try tld-list.com for comparisons.

Well thanks for at least explaining what it is, but isn’t Matrix already self hostable? Anyway what’s wrong with IRC?

I don’t get email notifications, but that number next to the icon changing is annoying. I have a few old responses that I’ve left “unread” on purpose, so I’m reminded to get around to dealing with them (look at some url or whatever). When the number changes, that means there are actual new responses, which after a day or two tend to be useless depending on the topic. So I’d rather shut them off.

It might be to stop the damn notifications you keep getting whenever anyone posts to a thread you started. Also it’s reasonable to think discussion forums are in some sense ephemeral. If you want a persistent store of knowledge, try Wikipedia. Lemmy could also host wikis if it’s worthwhile, like reddit does.

Scrounge an old laptop, maybe super cheap if the screen isn’t completely working. Plug in a monitor to deal with screen problems.

That leaves you with 17 more of them though.

These are mini PCs right? So you want something with a room full of humans or some type of local online service. Anyway, not a purely computer project.

Library terminals and game room come to mind, but neither are for installing at home.