gchristensen changed the topic of #nixos-chat to: NixOS but much less topical || https://logs.nix.samueldr.com/nixos-chat
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<gchristensen> any chemistry people here?
<jasongrossman> Not me, but I've just been grading essays on physics so I feel sort of chemistryish. Why?
<jasongrossman> ( gchristensen )
<gchristensen> I'd like to rapidly cool a fluid to a bit below 0C, and wonder how I might do that
<gchristensen> without dilution / contamination
<jasongrossman> Faster than in a domestic freezer? If so then I have no idea - sorry.
<gchristensen> yeah, much faster
<jasongrossman> I need to know why, even though I can't help.
<gchristensen> my best bet, I think, is a coiled copper pipe, pump, and a bucket of ice water
<jasongrossman> Oh, wait. Liquid nitrogen.
<jasongrossman> If you can get it.
<gchristensen> like ... stir it in?
<gchristensen> or, copper pipe immersed in it I guess
<jasongrossman> Pop your liquid into a container in a safe spot where nothing will splash on you and VERY CAREFULLY pour liquid nitrogen over it.
<gchristensen> cool, I might be able to make that happen
<jasongrossman> I've made ice cream this way.
<jasongrossman> You will be careful, right?
<gchristensen> definitely :)
<samueldr> wear goggles if you can, and read on whether you should put gloves on or not
<jasongrossman> Obviously you need a container that won't crack, although if your mystery liquid is not valuable and if you've set up your apparatus carefully maybe it won't be a disaster if it does crack.
<jasongrossman> I believe the greatest danger is if somehow any liquid nitrogen pools on you. I mean, forms a pool. Then you can't dissipate the cold and you get seriously hurt.
<gchristensen> ahhh yeah
<jasongrossman> Here, at least, amateurs work with liquid nitrogen all the time, but they set things up so that their bodies are not in the way.
<jasongrossman> At least the fumes are not poisonous!
<gchristensen> true
<jasongrossman> On second thoughts, do stir it in if you can, for efficiency. I still don't know what your mystery liquid is!
<jasongrossman> The downside of stirring it in is that it cools unevenly that way. (I don't know why, but it does.)
<gchristensen> oh... interesting
<gchristensen> uhh... I'd like to make instant frozen margaritas?
<gchristensen> (yes, it is -10C outside, but when you need a frozen margarita, you need a frozen margarita)
<jasongrossman> Oh cool, then it's almost the same as my ice cream making experience.
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<disasm> frozen margarita, tis an abomination!
<gchristensen> !
<disasm> margaritas are supposed to be on the rocks :)
<mdash> disasm: the thing that baffles me is why places serve frozen margaritas but not frozen rum and colas
<disasm> although having read the conversation, I applaud your effort to make a margarita with liquid nitrogen :) Let me know how it turns out!
<disasm> mdash: yeah, that's like an icee with alcohol :) Much better fit!
<gchristensen> disasm: liquid nitrogen or not, mostly I want to put together the ingredients and get out a frozen marg in ~30s :P
<disasm> another maybe simpler option would be to just freeze margarita mix into ice cubes and put it in the blender with the tequila. It'll take more than 30 seconds to freeze the cubes, but if you have a bunch in the freezer ready to go...
<jackdk> -10 outside? we've got another heatwave coming down under :S
<gchristensen> :|
<gchristensen> it was -16c this am
<jackdk> we have >= 40degC forecast for the next few days
<samueldr> I don't have today's data from the gov (available tomorrow) but yesterday's min was -23.9C
<jackdk> brrr
<samueldr> and it's summer here!
<samueldr> (j/k)
<gchristensen> samueldr: how low does it get there?
<samueldr> open the table just before the next section https://en.wikipedia.org/wiki/Quebec_City#Climate
<samueldr> thankfully we never get true heat over ~35 during the summer
<samueldr> though the proximity to the big river makes the climate a sticky in the summer
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<samueldr> it's probably not far from the kind of weather you have
<gchristensen> samueldr: pretty close to hear
<gchristensen> ...hear ... here.
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<gchristensen> simpson: meme-pushers?
<simpson> gchristensen: Evangelists.
<gchristensen> ah
<simpson> I worked at OSUOSL, a small academic datacenter, when ZFS was first open-sourced. There were many folks asking why we were using an "old" or "outdated" system, since we did XFS roots for most things.
<gchristensen> ...lol.
<simpson> I wish I knew how to better-generalize the lesson I've learned. I've learned that md is good and ext3/ext4 and XFS are good. I don't know if there's any deep lessons there, though.
<samueldr> know thy needs
<gchristensen> they are good
<samueldr> simpson: md -> md-raid?
<simpson> samueldr: Yeah, that's how I've always used it. I know that there's fancier ways to do md, but RAID5 and RAID6 have been remarkably reliable.
<cransom> stability is a feature. when i did networking often, a vendor could release a product and you still didn't touch it for at least a year or two to make sure bugs were shook out
<samueldr> good, I wasn't sure what "md" stood for
<simpson> "multiple devices" IIRC.
<simpson> Or maybe "multiple disks"?
<cransom> when someone didn't follow that mantra, they ended up buying two ginormous switches and putting it in a configuration where the datacenter would go down for 10 minutes every quarter because it was crap hardware.
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<gchristensen> whoooaaa
<clever> it even does the plex.tv/link and a 4 digit code thing
<gchristensen> I'm going to try that *immediately* upon arriving home
<clever> doesnt even need a window manager
<clever> oh, minor mistake i just noticed, `exec` is missing, so when you quit plex, it will resume launching the default desktop manager, lol
<gchristensen> hehe
<clever> after that, you just need some way to generate arrow key and enter events
<clever> currently using a wireless keyboard with a usb dongle
<gchristensen> aye, that is a bit how-ya-doin' but not bad
<clever> oh, and audio no-worky
<cransom> add a dash of flirc and you are set
<clever> this box was previously a headless server
<clever> [clever@system76:~/nixos-configs]$ nixops deploy -d house --include nas
<clever> cransom: i have previously written drivers for lirc on the rpi, using bit-banging IO
<gchristensen> :|
<clever> adding a WM so i can spawn a shell...
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<clever> aha, default audio output was the onboard sound
<clever> not HDMI
<clever> changes pushed up
<clever> that just leaves the whole ordeal of getting plex to label things right
<gchristensen> that is a whole ... thing.
<clever> but i can manage that from a shell and browser, and then it will persist to the tv
<clever> and now virtualbox is ringing, like a phone.....
<cransom> if the laptop is usually on your lap at the couch, you could always xhost + and x2x your way to tv navigation.
<cransom> i assume x2x is still a thing that exists
<clever> cransom: i usually leave the laptop downstairs
<cransom> (or X forward over ssh, security and all)
<clever> cransom: or synergy
<gchristensen> doesn't sound spousally compatible
<clever> gchristensen: https://imgur.com/a/numC05o should be, though?
<gchristensen> looks much more likely
<gchristensen> the roku remote, btw, is super good. it'd be neat to be able to pai9r that
<samueldr> "the internet button does not open the internet"
<clever> i like the ps3 "bluray" remove
<clever> its just bluetooth, need to look into how its pairing works
<samueldr> only bad thing with the ps3 blu-ray remote is how (by default?) it will never disconnect
<gchristensen> oh cool
<samueldr> thus eating through batteries
<samueldr> but it works great
<clever> samueldr: i dont think ive ever had to change the batteries on it, when used on a ps3
<samueldr> paired quickly
<samueldr> yeah, it does the right thing with the ps3
<samueldr> maybe since ~2013 it changed with linux though
<clever> i have previously used the ps3 controller under android, with the sixaxis app
<clever> main painpoint, is that my tablet at the time lacked OTG support
<clever> so i had to use a linux util to re-pair the controller to the tablet mac
<simpson> Oh, I missed that there was an upstream resolution to the ZFS drama.
<clever> oh, solved already?
<simpson> https://github.com/zfsonlinux/zfs/issues/8259#issuecomment-454169579 Just disable the *optional* usage of the GPL symbol.
<clever> sounds like a performance option
<clever> checksums will be slower without vectorization
<simpson> Hey, I bet performance would be even better if they wrote a clean-room in-kernel ZFS module.
<simpson> They *want* to be out-of-tree. They earned this.
<clever> related, the internal function to mount an fs is not on the whitelist
<clever> so zfs cant use it
<clever> so, zfs spawns "/bin/sh" [ "-c" "mount pool/dataset@snapshot /pool/dataset/.zfs/snapshots/snapshot" ] any time it auto-mounts
<clever> with zero env vars set
<simpson> Quality driver, right there~
<clever> on nixos, the bash thing to initialize PATH has been patched to use /path/not/set
<clever> so now /bin/sh cant find mount
<clever> (this has since been fixed on nixos)
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<aszlig> hm, anyone has an idea about a better name for the following option: https://gist.github.com/aszlig/2744d23ee4abce179f7a75b5450b6548#rule-opt-unix
<aszlig> basically "from_existing_unix_socket_path_matching" - but shorter =)
<jackdk> replace_domain_socket_glob?