the funny thing is that nobody will ever do that. The moment someone uses quantum computing or any other technology to crack bitcoin in a visible way, the coins they just gave to themselves become worthless because confidence collapses.
72 karma · joined June 2, 2022
Quantum computing is currently stuck somewhere in the 1800's, when a lot of the theory was still being worked out and few functional devices had even been constructed.
The video is essentially an argument from the software side (ironically she thinks the hardware side is going pretty well). Even if the hardware wasn't so hard to build or scale, there are surprisingly few problems where quantum algorithms have turned out to be useful.
AI models exist to make up bullshit that fills a gap. When you have a conversation with any LLM it's merely autocompleting the next few lines of what it thinks is a movie script.
DEC's terminals? killed by PCs. The VAX lineup? killed by RISC chips, and the VAX 9000 consumed a huge chunk of their cash reserves before embarrassingly being rendered obsolete by their own NVAX.
This was a time of change from minicomputers to microcomputers and DEC made costly decision after costly decision. They kept selling off profitable "non-core" portions of the business that in the process incurred a loss.
Of course, it's also possible that by that point Sun was already paralysed by infighting between various splinter groups, with no big bad DEC to fight against.
It killed their manufacturing based on hype, where as they all established a firm install base before itanium ever got rolling, which has ensured they continue to be (halfheartedly) maintained.
If the drive lies and says that part of the journal has been written when it hasn't yet, and ZFS goes ahead and writes the next part of the journal, then when you unplug the drive and the first part of the journal goes away (which the 2nd depended on) you're hosed. There have to be places where ZFS blocks until something critical has definitely, absolutely, been written to disk.
At that point the only thing ZFS can do is try to unwind back to whatever it thinks is a consistent state, but this isn't 100% guaranteed. (it depends on what old data is still hanging around)
If you want repair, you need to either set more than one copy in ZFS (still pretty dumb) or use multiple drives in a raidz (or mirror, though raidz is more efficient).
When you try to partition a drive like this (or configure ZFS to write multiple copies) you loose everything in the event that the whole drive fails. Honestly, it's a far better plan to just use multiple drives in a raidz so that whole-drive failures can be reconstructed in addition to data corruption.
In a raidz with at least one parity disk (and any number of data disks), corruption found on any data disk can be repaired immediately. For non-overlapping corruption a single parity disk is enough. If you have corruption of the same block on two different disks (extremely unlikely) then this can be repaired if you have two parity disks. (Etc. for three identically-corrupt data disks and three parity disks)
You can have eg. two parity disks and eight data disks (or more) and so long as no more than two disks are corrupted in the same block at the same time then a scrub will repair it completely.
The system of parity disks in ZFS' raidz is meant for reconstructing entire failed data disks, so fixing corruption is no big deal.
See all those various overlapping functions? It's the combination of functions on every pin that has to be mimicked too.
Even though the raspi foundation get a fair degree of customization from broadcom, putting peripherals on a chip gets harder for process reasons as you push for performance. This is the same reason why the M1/M2 implement the eUSB spec and have external eUSB repeaters, instead of putting it fully on-chip. The foundation clearly want to go in the direction of increased performance, so it makes sense to push all that messy GPIO stuff off onto a custom chip, get additional cost reduction from including ethernet and USB (fewer chips), and also continue to build their chip design acumen.
I wouldn't be surprised if arduino go this way too. They're already severely limiting themselves in performance and ram by selecting a 5V ARM chip, and matching the exact peripheral combination of the atmega328 is just as much of a millstone around their neck too. They could go with a much cheaper and faster arm core communicating with an AVR chip to manage the IO pins and have a significantly more capable board. Lots of 3rd party AVR+ESP32 boards already do this.
They were never intended to reward innovation. They do intentionally grant fixed-duration monopolies.
Patents were intended to encourage companies to disclose trade secrets, forwarding public knowledge. In return, that company is granted continued exclusive use of the idea, as if it had never been revealed. This is also why ALL patent drawing are in the public domain.