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User: cperciva

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Comments · 1,639

  1. Re:Hospitals on A DNA Sequencer Cheap Enough For (Some) Doctors' Offices · · Score: 2

    The only reason they do instant strep tests at MD offices is that they want to know the results before you walk out the door. The same goes for rapid STD tests: If you walk out the door and have to come back to get the results later, there's a chance you won't return.

    A DNA test is the ultimate in non-urgent tests, and is going to remain something you head off to the phlebotomist to get done... right up until the day where they are done routinely at birth and you leave the hospital jugging a baby, birth certificate, and a flash drive containing its DNA sequence.

  2. EC2 AMIs available on FreeBSD 9.0 Released · · Score: 5, Informative

    FreeBSD 9.0-RELEASE machine images for Amazon EC2 are available for m1.large and larger instance types: http://www.daemonology.net/freebsd-on-ec2/

  3. Re:It is not impossible on Dropbox Can't See Your Dat– Er, Never Mind · · Score: 1

    Tarsnap's snapshotting model is a bit more sophisticated than how duplicity works, and its separate keys for writing/reading/deleting archives makes it possible to do some things you can't do with rsync.net (e.g., you can have a server which does daily backups with Tarsnap while still making it impossible for someone who roots the server to tamper with said backups).

    But yes, tarsnap and duplicity+rsync.net are certainly more similar than, say, tarsnap and dropbox.

  4. Re:It is not impossible on Dropbox Can't See Your Dat– Er, Never Mind · · Score: 1

    I love my customers...

  5. Re:It's all about entropy on Distinguishing Encrypted Data From Random Data? · · Score: 1

    If all you ever want to compress is files which contain the same byte repeated many times, then yes, that's how you would compress them.

    But most compression formats are tuned to produce good results for the sorts of files which people are more likely to need to compress; so even when run-length encoding is used, it will typically have a low limit -- say, 255 -- on the run length.

  6. Re:Go work for RethinkDB! on Skipping Traditional Recruitment, Going Straight To the Source · · Score: 1

    If you don't want to live in the bay area, then don't work for RethinkDB, I guess? I don't think they're hiring anyone remote (but I might be wrong).

    And what's wrong with rsync for backups?

    1. rsync isn't backups, it's synchronization. It will happily synchronize corrupted files and (if you use the relevant option) file deletions.
    2. rsync requires you to trust the location you're syncing your data to.
    3. Because rsync is designed for synchronization, it doesn't store your data compressed.
    4. Because rsync works file-by-file, it can't take advantage of duplication between files.

    Probably other things too, but those are the first ones which come to mind.

  7. Go work for RethinkDB! on Skipping Traditional Recruitment, Going Straight To the Source · · Score: 1

    I've talked to Slava a lot, and he's a really smart guy. Unlike most startups, RethinkDB is actually doing innovative things. If you're looking for work in the bay area and you're good at algorithms, GO WORK FOR RETHINKDB!

    (If I didn't have my own startup, I'd be working there right now -- instead I'm cheering them on from afar.)

  8. Re:unintentionally? on Genetically Modified Canola Spreads To Wild Plants · · Score: 1

    Somehow, though, I'm guessing Monsanto will prove most unwilling to go around hand weeding "their" IP when it becomes a pest.

    They haven't done that personally, no. But they have paid to have it done when farmers have complained about contamination.

  9. Re: unintentionally? on Genetically Modified Canola Spreads To Wild Plants · · Score: 1

    When your own saved seeds include them, even if you would not select at all?

    That's a good question, but it's purely hypothetical. This guy did actively select the Monsanto seeds to plant them. The court specifically said that they didn't believe it was accidental that 95% of his field ended up having Monsanto genes.

  10. Re:unintentionally? on Genetically Modified Canola Spreads To Wild Plants · · Score: 1

    But if his fields had been naturally pollinated, why should he be responsible for Monsanto's inability to contain their pollen?

    Because he specifically decided to replant the Monsanto seed. It's one thing to have your crops polluted; it's quite another to say "hey, I like this pollution and I'm going to spread it further".

    In fact, if he was in the business of selling non-GMO, the contamination of his fields could cost him value, customers, or even entire markets.

    Which is why Monsanto agreed to pay him for the costs of eliminating the Monsanto seed which had been accidentally blown into his field.

  11. unintentionally? on Genetically Modified Canola Spreads To Wild Plants · · Score: 4, Interesting

    Reader n4djs notes that Monsanto has been known to sue farmers for patent infringement when their crops unintentionally contain genetically modified plants.

    This might have happened, but the Percy Schmeiser case is not such a case. The Supreme Court of Canada found that Schmeiser deliberately harvested and planted his field with seed which he knew had Monsanto's genetic modifications.

    It rather scares me that one of the leading anti-GMO spokesmen is someone who deliberately planted his field with genetically modified seed and then lied about it when he got caught.

  12. Re:Binary System? on Nearby Star Forecast To Skirt Solar System · · Score: 1

    And then you've got to assume that the incoming star hits this dark brown dwarf

    Or rather, hope that they don't collide. The energy released by a stellar collision that close to Earth would probably destroy not only the human race, but also all other life on Earth.

  13. This is an opportunity, not a threat! on Nearby Star Forecast To Skirt Solar System · · Score: 2, Interesting

    Providing that humanity still exists in the year 1.5M but hasn't yet spread to other solar systems, this is a huge opportunity: Rather than needing to travel 3-4 light years in order to reach another star, we'll need to travel less than one light year -- thus making the trip both faster and much cheaper.

    Who knows, it might even be possible to slowly spread across the entire galaxy without ever venturing into interstellar space.

  14. This sucks, but is it wrong? on PayPal Freezes Cryptome's Account · · Score: 1

    This definitely sucks for cryptome. But has PayPal actually done anything wrong?

    It seems to me that PayPal isn't trying to be evil here; rather, they made a business decision that cryptome wasn't an organization they wanted to do business with. Businesses make such decisions every day -- car rental companies in Canada, for example, often refuse to rent cars to anyone under age 25 -- so why is it different when PayPal does the same thing?

    (For the record, my company only takes payments via PayPal, but I'm eagerly looking forward to the day when Amazon Payments or Google Checkout start accepting Canadian merchants. I don't like PayPal either; I just think they're not being evil in this case.)

  15. Re:Bad math... on Factorization of a 768-Bit RSA Modulus · · Score: 3, Insightful

    It is more like O(a^(n/b))

    No, factorization is more like O(a^(n^b)). For GNFS on RSA-sized inputs, 1000^(n^(1/3) - 2.5) is a good estimate of the number of operations required.

  16. Re:Atheists Unite... as a religion on Ireland's Blasphemy Law Goes Into Effect · · Score: 2, Insightful

    In my dictionary, atheism is defined as "Disbelief in, or denial of, the existence of a God". This is quite distinct from the position of agnosticism, which states that we do not know if there is a God.

  17. Re:Atheists Unite... as a religion on Ireland's Blasphemy Law Goes Into Effect · · Score: 0

    The fact that Atheism has a very limited set of beliefs -- namely one, "There is no God" -- doesn't make it any less of a religion.

  18. Re:"Supreme courts" on Italy May Censor Torrent Sites · · Score: 3, Insightful

    Jurists != Jurors.

    A jurist usually means anyone with a law degree, although in some countries it is generally reserved to refer to judges.

  19. Re:freebsd-update via wlan? on FreeBSD 8.0 Released · · Score: 1

    Good point... come to think of it, I'm not sure how it's possible to do that even with a source upgrade, since trying to run an 8.0 world on a 7.x kernel would break too.

  20. Re:Hey, you're the guy! on FreeBSD 8.0 Released · · Score: 1

    Thanks for the kind words -- I certainly should be able to write coherent instructions for doing a binary upgrade, though, given that I wrote FreeBSD Update. :-)

  21. Re:wpa_supplicant replacement? on FreeBSD 8.0 Released · · Score: 3, Informative

    Are you running into the "need to create wlan0 instead of using the wifi device directly in 8.0" change? This has tripped up a lot of people.

  22. Re:Jumping the gun... on FreeBSD 8.0 Released · · Score: 1

    We all know that slashdotters don't rtfa, but he'll probably get some traffic from people who aren't regular slashdot readers and don't know how things work around here.

  23. Re:Jumping the gun... on FreeBSD 8.0 Released · · Score: 4, Informative

    I should also add that one link the submitter didn't include was instructions for upgrading to FreeBSD 8.0-RELEASE from a previous release: http://www.daemonology.net/blog/2009-07-11-freebsd-update-to-8.0-beta1.html (obviously, apply s/8.0-BETA1/8.0-RELEASE/ to the instructions).

    Before anyone asks, yes, that link is on my personal website -- but no, I'm not just posting it here to drive traffic in my direction. That link is going to be in the official release announcement too.

  24. Jumping the gun... on FreeBSD 8.0 Released · · Score: 5, Interesting

    Technically, 8.0-RELEASE has not yet been announced. Judging by the links in the submission, it looks like the "anonymous reader" is whoever owns cyberciti.biz, and he decided to submit the story early in order to drive traffic to his site.

  25. Re:Did no one read the fine summary? on Synchronize Data Between Linux, OS X, and Windows? · · Score: 1

    Tarsnap is really designed as a backup service rather than a synchronization service: While it is very good at recognizing duplicate data and only uploading new blocks when you create an archive, it has no such mechanism for making archive extraction more efficient -- I wrote it with the presumption that people would only be extracting archives after losing data. That said, I think I can see a way to implement "tarsnap -x --sync" efficiently.

    But for right now, as much as I'd love to get more customers, I don't think Tarsnap really matches the submitter's requirements.