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?
17:07
<vagrantc>
LTSP supports multi-seat, so i'm not sure i get the question
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.
17:09
<vagrantc>
you mean multiple keyboards/mice/monitors attached to one machine?
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.
17:10
<vagrantc>
depends on your context, both are useful
17:10
and you can set up LTSP clients with multiseat ...
17:10
<XJ8>
Can either one of them let you boot with a different kernel?
17:11
<vagrantc>
in multiseat, there is only one kernel booted, as i understand it
17:12
in LTSP, each client can have a different kernel, though the cases where that is useful are pretty niche
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?
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
17:13
e.g. all the applications are typically running on the local client hardware
17:13
but each client could have a different kernel, selectable at boot
17:13
and a different OS, for that matter
17:13
<XJ8>
Oh, so alice doing video export won't interrupt bob because her computer crashed?
17:14
<vagrantc>
basically, LTSP is a framework to network boot computers
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?
17:15
<vagrantc>
nothing stored locally, typically
17:16
<XJ8>
Ah, the server stores it, but the client runs it.
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
17:17
<XJ8>
ok, but if it's read only, how would you be able to update the computer without shutting down?
17:17
<vagrantc>
you don't :)
17:17
i mean, you can technically update them in place, but all writes go to ram so not really a good idea
17:17
<XJ8>
Eh, I'll just update when nobody is logged in.
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.
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
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
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
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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