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On Mon, 17 Feb 2014 23:30:42 -0600 Canek Peláez Valdés wrote: |
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> On Mon, Feb 17, 2014 at 8:05 PM, Gevisz <gevisz@×××××.com> wrote: |
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> [ snip ] |
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> > How can you be sure if something is "large enough" if, as you say below, |
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> > you do not care about probabilities? |
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> |
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> By writing correct code? |
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|
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Real world code without mistakes and larger than "Hello, world!" |
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exercises is not possible. Large systems must have error suppression |
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and correction techniques, modular and replaceable design is one of |
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them, KISS is another one. Systemd has none known to me. |
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|
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> >> I don't care about probabilities; |
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> > |
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> > If you do not care (= do not now anything) about probabilities |
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> > (and mathematics, in general), you just unable to understand |
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> > that debugging a program with 200K lines of code take |
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> > |
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> > 200000!/(10000!)^20 |
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> > |
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> > more time than debugging of 20 different programs with 10K lines of |
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> > code. You can try to calculate that number yourself but I quite sure |
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> > that if the latter can take, say, 20 days, the former can take |
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> > millions of years. |
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> > |
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> > It is all the probability! Or, to be more precise, combinatorics. |
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> |
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> My PhD thesis (which I will defend in a few weeks) is in computer |
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> science, specifically computational geometry and combinatorics. |
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|
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You're not the one here on the list with PhD (either defended or |
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near its end). And argument "Listen to me! I'm PhD here!" looks |
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miserable. Please stop this. |
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|
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> >> I care about facts: FACT, I've been using systemd since 2010, |
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> >> in several machines, and I haven't had a single segfault. |
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> > |
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> > Have you ever tried forex? If yes, you should have been warned |
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> > that "no past performance guarantee the future one." |
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> |
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> I never said that. I trust the quality of the code, measured by my own |
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> judgment and bug reports, etc. Not past performance. |
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> |
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> And even if a bug goes by, then what? The world will end? |
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|
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This depends on what bug at what component occurred. Just imagine |
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pid 1 segfault on medical life support equipment. With systemd going |
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into embedded this is not just pure speculation, though, of course |
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medical stuff should have extra safeguards. But any FT or at |
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least HA setup is a combination of multiple layers. I do not want to |
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allow badly broken core component on mine setups even if its faults |
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may be compensated by other means. |
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|
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Yet again, I respect ones right to use whatever one wants, but I ask |
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to respect mine as well. That's why I propose a separate systemd |
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profile for those willing to use it. |
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|
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> >> Sorry, but it's you who doesn't know the matter at hand: kdbus was |
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> >> (and is) written by Greg Kroah-Hartman, Linus' right hand, and who |
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> >> works for the Linux Foundation. |
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> > |
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> > Lol, he seems to start to use the arguments like "You even do not know |
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> > my elder brother/acquaintance from the street nearby who can easily |
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> > hit you down!" |
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> |
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> If you don't think Greg's words have any weight in a Linux-related |
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> technical discussion, then I'm afraid we will need to agree to |
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> disagree on any technical subject. |
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|
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You know, common sense should always override person's prestige. |
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History knows many examples. Sir Isaac Newton enforced corpuscular |
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point of view on the light's nature. And while he was genius in other |
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physical aspects, he was mistaken here. Albert Einstein was rejective |
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to probabilistic nature of quantum mechanics and even proposed an |
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entangled particles paradox as an example of its "flawed" nature. |
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Though as we know these days such systems exist and are quite well |
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used in numerous experiments. My point is simple: do not blindly |
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adhere to someone's words, even if this person has high authority. |
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Common sense must prevail. Period. |
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|
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Best regards, |
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Andrew Savchenko |