IRC chat logs for #ltsp on irc.libera.chat (webchat)
Channel log from 23 April 2017 (all times are UTC)
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| 06:38 | <Alex____> Hi folks,
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| 06:39 | <alkisg> Hello
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| 06:40 | <Alex____> I am in the process of setting up a network with LTSP at a veterinary hospital in Canberra, Australia. I have a few things that I have been unable to solve so far.
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| 06:40 | <alkisg> Shoot
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| 06:41 | <Alex____> The LTSP server is running Debian Jessie, and when a client connects and uses the scroll wheel, it appears really jerky. This is most pronounced while using Chromium. Is that a server side resources issue?
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| 06:42 | <alkisg> !thin-client-bandwidth
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| 06:42 | <ltsp> I do not know about 'thin-client-bandwidth', but I do know about these similar topics: 'thin-clients-bandwidth'
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| 06:42 | <alkisg> !thin-clients-bandwidth
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| 06:42 | <ltsp> thin-clients-bandwidth: A small explanation why thin clients can't perform well with video, lots of screen updates etc: https://sourceforge.net/p/ltsp/mailman/message/35694699/
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| 06:42 | <alkisg> You can read an explanation in that ^ message that I wrote
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| 06:42 | The best thing to do is switch to diskless ltsp fat clients instead
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| 06:42 | What are your client specs, i.e. which cpu and how much ram?
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| 06:43 | <Alex____> They are Intel NUC machines with Atom CPUs
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| 06:44 | Let me find that out exactly....
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| 06:45 | DE3815TYKE
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| 06:47 | Intel Atom E3815 @1.46Ghz
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| 06:48 | 4GB RAM
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| 06:48 | <alkisg> http://www.cpubenchmark.net/cpu.php?cpu=Intel+Atom+E3815+%40+1.46GHz
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| 06:48 | Ouch, that's a bit low, but with 4 GB RAM it'll still run better as a fat client rather than as thin
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| 06:48 | So what you need to do is to install a desktop environment inside the chroot
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| 06:49 | Or, you could have used the new method to install ltsp, which is called ltsp-pnp and doesn't use chroots:
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| 06:49 | !ltsp-pnp
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| 06:49 | <ltsp> ltsp-pnp: ltsp-pnp is an alternative (upstream) method to maintain LTSP installations for thin and fat clients that doesn't involve chroots: https://help.ubuntu.com/community/UbuntuLTSP/ltsp-pnp
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| 06:49 | <alkisg> ...I think there's a tutorial for jessie somewhere as well
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| 06:50 | The fastest way to try it now, is `sudo ltsp-chroot apt-get install your-favorite-de`, like mate-desktop or whatever else you prefer
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| 06:52 | <Alex____> So the aim there is to have a netbooted fat-client instead of the thin-client that I am running now, and by using the CPU and RAM of the terminal achieve a net gain in performance?
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| 06:53 | <alkisg> Right
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| 06:53 | Because only disk data will travel on the local network, not screen data
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| 06:53 | And disk data for a video is e.g. 1 mbps, while screen data for the same video is 2 gbps
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| 06:53 | <Alex____> Ok, got it.
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| 06:54 | <alkisg> And once you've installed the DE in the chroot, you can switch between thin/fat mode with a single line in lts.conf, LTSP_FATCLIENT=True or False
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| 06:54 | <Alex____> That is pretty cool.
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| 06:54 | <alkisg> Ideally your clients should have at least 1000 cpu benchmark score
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| 06:55 | <Alex____> I am guessing I will need to build a new netboot image every time I make a change?
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| 06:55 | <alkisg> The 362 that they have now is low, it's similar to a pentium 4 @ 3GHz
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| 06:55 | So the apps will launch a bit slower than they used to, when they were launched from the server
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| 06:55 | But the screen updates will be much smoother
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| 06:55 | Yes, when you install new software you need to run ltsp-update-image, if you're using NBD
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| 06:55 | If you're using NFS, you don't need to run it
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| 06:56 | <Alex____> Ok, I'll give that a go. Thanks for the help.
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| 06:56 | <alkisg> np
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