IRC chat logs for #ltsp on irc.libera.chat (webchat)
Channel log from 27 October 2021 (all times are UTC)
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| 17:07 | <XJ8> Hello. Is this really a better alternative to xorg multiseat if you want many people to share one computer?
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| 17:07 | <vagrantc> LTSP supports multi-seat, so i'm not sure i get the question
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| 17:08 | <XJ8> It does? Well I didn't know that. When I mean xorg multiseat I am referring to traditional xorg multiseat and not using LTSP.
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| 17:09 | <vagrantc> you mean multiple keyboards/mice/monitors attached to one machine?
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| 17:09 | <XJ8> I mean like (think of school or work environment as an example) all sharing one computer so maintaining it is significantly easier than having to admin dozens of machines manually.
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| 17:10 | <vagrantc> depends on your context, both are useful
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| 17:10 | and you can set up LTSP clients with multiseat ...
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| 17:10 | <XJ8> Can either one of them let you boot with a different kernel?
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| 17:11 | <vagrantc> in multiseat, there is only one kernel booted, as i understand it
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| 17:12 | in LTSP, each client can have a different kernel, though the cases where that is useful are pretty niche
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| 17:12 | <XJ8> My understanding is that the client diskless computer logs into the server over the network. Can I have a selection of which server to boot into like A has a stock kernel and B has customized kernel?
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| 17:12 | <vagrantc> you can have multiple different kernels, although modern LTSP mostly works just to boot the OS from the network; there's not much the server is doing other than a fileserver
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| 17:13 | e.g. all the applications are typically running on the local client hardware
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| 17:13 | but each client could have a different kernel, selectable at boot
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| 17:13 | and a different OS, for that matter
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| 17:13 | <XJ8> Oh, so alice doing video export won't interrupt bob because her computer crashed?
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| 17:14 | <vagrantc> basically, LTSP is a framework to network boot computers
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| 17:15 | <XJ8> Which part of the unix file system is stored on the server: /bin? /sbin? Which parts are stored on the client machine? Or are they not?
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| 17:15 | <vagrantc> nothing stored locally, typically
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| 17:16 | <XJ8> Ah, the server stores it, but the client runs it.
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| 17:16 | <vagrantc> the whole OS is served from the server, typically as a read-only squashfs image, and a user's homdir is mounted either over sshfs or nfs or whatever
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| 17:17 | <XJ8> ok, but if it's read only, how would you be able to update the computer without shutting down?
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| 17:17 | <vagrantc> you don't :)
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| 17:17 | i mean, you can technically update them in place, but all writes go to ram so not really a good idea
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| 17:17 | <XJ8> Eh, I'll just update when nobody is logged in.
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| 17:24 | I like how unlike regular xorg, I don't have to have one GPU per monitor, the GPU would be part of the diskless client.
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| 17:25 | I mean GPU per monitor for the server machine.
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| 17:29 | <vagrantc> it is a bit simpler to configure than multiseat, i would say
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| 17:29 | both hardware and software wise
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| 17:30 | <vagrantc> but you can also have multiseat LTSP clients, to get the best/worst of both worlds :)
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| 17:55 | <alkisg> XJ8: with ltsp, if you have a server and 10 diskless ltsp clients, you avoid buying 10 disks. With multiseat, you can have 5 clients with 10 monitors; that way you avoid buying 5 motherboards/cpus
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| 17:55 | While with ltsp AND multiseat (it's just a MULTISEAT=1 in a config file), you can save 10 disks AND 5 motherboards/cpus
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| 17:55 | And of course it's easier to maintain the images, the users and their home directories, as everything is on the server
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