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Comment Re:bit rot (Score 1) 475

ZFS is harder to setup and manage than EXT4 but easier than LVM + md. If you wanted to do any kind of mirroring / software RAID it is pretty much the recommended way under Linux right now. The only thing that could have been a problem is deduplication. Stay away from that stuff.

Comment Re:bit rot (Score 1) 475

No, not at all. ZFS is designed to work on bare disks with as little hardware and software between the devices and itself. No battery protected stuff; hardware RAID is a big no no. It was also started on ancient Sun hardware that is so very slow compared with modern hardware that it is not even funny.

I have a ZFS system that has been running for years on a 2010-era Pentium. It does require a lot of memory. Don't bother with deduplication (off by default) but do turn on compression.

Comment Re:bit rot (Score 1) 475

I recommend using a RAIDZ6 on heaps of tablets then. Should be good up to two broken tablets by VDEV of 8-12 tablets. Do a vigorous scrub now and then, perhaps with a metal brush. If in doubt, convert to read-only by burying the tablets.

Hope this helps.

Comment Autonomous car harder to do than Elon Musk thinks (Score 1) 130

Elon Musk is on record for saying that Tesla cars would drive themselves by the end of 2017, adding that it would mean full autonomy with a reliability greater than that of a human.

In my opinion, the reason why Apple and Google have pulled out is not that the technology does not work, but that it is not yet demonstrably sufficiently reliable, and that cheap sensors that make the technology both feasible and economic are not out yet.

Meanwhile the traditional car makers are content with a partnership with the likes of Mobileye just to exist in this space.

Personally I believe full car autonomy is feasible, safe and useful on highways, and has been for some time. I'm not sure about economic. The other use cases are not so clear cut.

Comment Re:Good on him (Score 2) 226

Technically the Shuttle was a reusable rocket, so we know it works.

Reusable conventional rockets are an interesting concept. Engineers at NASA and ESA thought it would not be economical. NASA and ESA use a small number of large engines each time they send one of their rocket up, and so reusing them means firing one of the large engine for a long time (which damages them and requires significant amounts of fuel that would have been otherwise used to put satellite into orbit). A SpaceX rocket uses a large number of small engines, so letting one fire for longer in order to retrieve all the others makes more sense. Nonetheless these engines spend more time in space and experience a reentry, which may damage them.

AFAIK SpaceX hasn't yet tried to reuse any of the retrieved engine. They already have a less-than-stellar safety record so that is not surprising. I suspect the road to effective return on investment on the reusable rocket venture may be longer than anticipated.

 

Comment Re:Deliberately missing the forest for the trees (Score 1) 386

It's not disgust, it's impracticality. Young people no longer can pay for their university degree by working in stores. Unless you are a genius (rare), either your parents do it for you, or you are unlikely to ever reach the middle class. I'm not exactly sure what kind of future we offer our kids.

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