IRC chat logs for #ltsp on irc.freenode.net (webchat)


Channel log from 22 March 2010   (all times are UTC)

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04:00
<iwkse>
hi all, is possible to let the server probe thin client's usb or sd devices? there's any doc available for this?
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04:01
<alkisg>
iwkse: what do you mean by "probe"? ltspfsd automatically forwards the file contents in usb devices...
04:02
<iwkse>
alkisg: i mean, i can plug whatever i want on the thin client and the server will see it?
04:02
<alkisg>
Block devices, yes
04:02
<iwkse>
so sd should works too
04:03
ltspsd runs on the client?
04:03
<alkisg>
Yes
04:03
<iwkse>
ah okey i understood now
04:04
you said block devices yes..
04:04
so if i have a usb scanner would be a trouble?
04:06
<alkisg>
Scanners need another lts.conf variable...
04:06
!lts.conf
04:06
<ltspbot`>
alkisg: "lts.conf" :: http://manpages.ubuntu.com/lts.conf
04:07
<iwkse>
alkisg: thanks i'll take a look
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05:17
<gnunux>
hi
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09:51
<sbalneav>
Morning all
09:52
<thunsucker>
good morning
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10:21
<epaphus>
hello all. The average bandwith consumption for a thin client is 2000-5000Kbytes/se while surfing the web (without flash).. and having office opened. Right?
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10:23
<epaphus>
so If my server has 1 gigabit network card and 1gigabit/sec is 128Megabytes /sec then it is safe to assume that 1 card could handle about 20 users
10:23
right?
10:24
<alkisg>
epaphus: I don't think we have a measure for the average bandwidth consumption, but yeah, a gigabit network for 20 "office" users should suffice fine
10:25
(except for impress slides transitions)
10:25
<epaphus>
what are impress slides transition?
10:25
the X session is encrypted right?
10:28
<alkisg>
I mean the presentations created with openoffice impress (powerpoint)
10:28
If they have transition effects, they're too slow in ltsp
10:28
<epaphus>
ahh got it
10:28
well youtube runs perfectly fine
10:28
<alkisg>
The X session is encrypted unless you use LDM_DIRECTX=True
10:28
<epaphus>
in fact i cant even notice iam using a thin client :P
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10:29
<alkisg>
20 encrypted youtubes will kill all the server CPU :)
10:29
<epaphus>
iam going to be using an i7 cpu
10:29
:P
10:29
<alkisg>
(or even 5 of them :))
10:30
<sbalneav>
epaphus: It really depends. Once you receive the web page, and are "reading" it, you're not using up any badwidth at all.
10:30
<epaphus>
Also.. is there any advantage of not using deskptop backgrounds in ltsp ?
10:31
<sbalneav>
I currently have one sever with 40 terminals hanging off of it, and they work fine.
10:31
epaphus: Other than using less ram on the thin clients, not much.
10:32
<epaphus>
great.
10:32
this is sooo awesome.
10:32
One more question. Can ltsp handle softphones now a days? (twinkle, ekiga) .. any advantage of running as a local app?
10:32
<sbalneav>
That's how I'd run a softphone.
10:33
many people have deployed skype solutions using localapps.
10:33
<epaphus>
ok cool.
10:34
Is setting a localapp easy stuff? Is it true that if I set firefox as a localapp iam not necessarly running java/ flash as a local app also?
10:36
<sbalneav>
If you set up firefox as a local app, you'll have to set up flash, java, etc as local apps as well.
10:37
Local apps are fairly easy to set up, but there are some gotchas
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10:38
<epaphus>
sbalneav, with the libraries right?
10:38
<sbalneav>
libraries, as well, we gain access to files via sshfs, and not everything works 100% over sshfs.
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10:49
<epaphus>
sbalneav, it is possible however that... i can put flash and java as a local app only.. right? and not firefox/
10:49
?
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11:05
<sbalneav>
epaphus: Not as far as I'm aware
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11:06
<sbalneav>
that would mean that the browser would be running on the server, but it would have to know that one of the elements on the web page was running on the client.
11:09* alkisg has managed to communicate with the ltsp clients using reverse bash => python connections, and is now looking at python asyncore... if anyone has any thoughts/python networking experience, I'd be glad to hear it
11:10
<sbalneav>
What is it you're communicating?
11:11
<alkisg>
I'm trying to implement something like italc, but more advanced
11:11
<sbalneav>
AFAIK, "Twisted" is the "premier" python network framework.
11:11
<alkisg>
So the server would keep active control connections to all clients (as root) and all connected users (through the ssh channel)
11:11
<sbalneav>
alkisg: this for that other project you pointed me at?
11:11
<alkisg>
Yes
11:12
<sbalneav>
I did some fiddling around with it... remind me where the source is again?
11:12
<highvoltage>
hi sbalneav and alkisg
11:12
<alkisg>
http://bazaar.launchpad.net/~sch-devs/sch-scripts/trunk/
11:12
hi highvoltage
11:12
<highvoltage>
for some reason it feels like months since I spoke to you
11:12
<sbalneav>
It's been about 4 weeks or so since I looked at iy.
11:12
hey highvoltage
11:12
<highvoltage>
how are things?
11:13
<alkisg>
We've finished the thin/fat installation "automation" and now we're looking to embed classroom management tasks
11:13
<sbalneav>
highvoltage: very busy at work. :( Year end at gov't agencies is always hellish.
11:13
<highvoltage>
what is classroom management tasks?
11:13
<alkisg>
So that the teacher is able to send commands to either the TCs (e.g. poweroff) or the client sessions (e.g. open that URL on firefox)
11:13
<highvoltage>
oh cool
11:14
<alkisg>
Any daemons on the clients won't do, as TCs are unsafe by default
11:14
(so ssh etc aren't any good)
11:14
So I'm looking at reverse connections, where the TCs connect to the server... that should be a little safer
11:15
bash exec 3<>/dev/tcp/server/port is fine for that - it only needs 3 MB on the client, and has no dependencies at all
11:15
But on the server a python module would be needed...
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11:41
<alkisg>
So I'm thinking to create a python server that would accept connections from TCs and users, and create sockets for those connections in /var/run/ltsp-control/<host>-<user>-<ip>.socket. Then a teacher can connect to that socket either with an app (sch-scripts) or with just bash <> socket, and execute commands on the TCs/student sessions. And maybe I'll put some group-based permission on those sockets...
11:42
That way to see which TCs/clients are connected to the ltsp server, a simple ls /var/run/ltsp-control would suffice...
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12:47
<epaphus>
so guys.. is there any way to compress or reduce the amount of bandwith a client eats?
12:48
<Lns>
epaphus: localapps?
12:49
<epaphus>
hmm ok.
12:51
<johnny>
epaphus, is bandwidth really a problem?
12:51
would probably be better to upgrade your equipment to gb stuff..
12:52
<epaphus>
johnny, its not.. but iam interested in seeing how this runs through the internet :D
12:52
hehe
12:52
<johnny>
terrible
12:52
don't do it
12:52
use nx
12:52
<epaphus>
oh ok.
12:52
freenx you mean right johnny ?
12:52
<johnny>
neatx hopefully
12:52
if it's any good
12:52
i haven't actually looked at it tho
13:02* alkisg wonders why freenx doesn't have a lucid version, while neatx does..
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14:00* alkisg just tried neatx for Lucid, works like a charm
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15:02
<markvandenborre>
are there any big changes in terms of client memory requirements between LTSP in Ubuntu 8.04 and the upcoming 10.04?
15:03
will I still be all right with 64 Mb of ram in the client?
15:03
will 32 Mb more or less do?
15:04
<alkisg>
64 with nbd swap should be OK
15:04
<markvandenborre>
(I'm running a +-50 client setup in my former primary school since 2004 as a volunteer)
15:04
alkisg: thanks for the hint
15:04
<alkisg>
There's a new lts.conf variable, NBD_THRESHOLD, you may want to set that to e.g. 100 MB so that all clients with less RAM than that get an 64MB swap...
15:05
<markvandenborre>
ah, nice, thanks
15:05
hm, ltsp temporarily removed from the Ubuntu 10.04 beta image
15:06
<alkisg>
?
15:06
ltsp removed? what do you mean?
15:06
<markvandenborre>
I have a training session to give on Ubuntu, and I was counting on installing an ltsp setup
15:07
alkisg:
15:07
http://lwn.net/Articles/379709/
15:08
alkisg: ^
15:09
<alkisg>
markvandenborre: that's the text mode installer for the edubuntu dvd
15:09
It's not what you think...
15:09
The ubuntu CDs remain unaffected
15:09
<markvandenborre>
ah, perfect
15:10
<alkisg>
The edubuntu DVD now (is going to) has a live LTSP option, so the text mode ltsp installation has been removed to save space
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15:19
<Lns>
alkisg: does that mean you can install LTSP from the "live LTSP option" ?
15:36
<alkisg>
Lns, yup
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16:31
<markvandenborre>
alkisg: I see
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17:11
<vagrantc>
well, it appears qemu handles CD devices in a way that causes cdpinger to fail on debian, though virtualbox works mostly ok.
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20:54
<jammcq>
hey all
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21:38
<stgraber>
doing some final tests then tagging ltsp 5.2.1 and ldm 2.1.1. I'll upload two changes for Ubuntu to deal with plymouth properly and that should be it
21:44* vagrantc waves
21:44
<vagrantc>
i haven't done any testing of the commits since the last round of releasing...
21:44
there's always the next version
21:44
stgraber: can you put in a sync request for ltsp-docs this late?
21:45
it contains some fairly important updates
21:45
<stgraber>
vagrantc: I can try but we are past string freeze and UI freeze so it's not very likely to be accepted
21:45
<vagrantc>
stgraber: no UI changes, though definitely some additional text.
21:46
<stgraber>
what's the source package in debian ?
21:46
<vagrantc>
stgraber: ltsp-docs
21:46
<stgraber>
I'll file the request anyway and argue that it's to better match what we already have in the archive
21:46
bzr105 ?
21:46
<vagrantc>
i just adds documentationm for features already present in the archive
21:46
yup
21:47
vs bzr99
21:47
the diff is tiny
21:49
<stgraber>
sent
21:50
<vagrantc>
what is plymouth?
21:50
<stgraber>
I'm building PPA snapshot of ldm and ltsp btw, I'll have the source package for both of these in my PPA and will likely tag that as 5.2.1 and 2.1.1 tomorrow
21:51
it's the replacement of usplash, it's the splash screen used by Ubuntu since Lucid and Fedora for a while already
21:51
<vagrantc>
won't probably have a chance to test till wednesday
21:54
<stgraber>
I should have worked on that a month ago ... last minute trip to Canonical in London caused me to move a lot of things till a month later (as I don't have a LTSP lab in Europe) and now I'm really close to the second Beta freeze and then the RC/Final freeze ...
21:54
I hate that, rushing tests and bugfixes on a LTS is really not a good idea but well ... that's that or our half-broken 5.2 LTSP (no splash, ugly warnings, ...)
21:56
luckily ltsp upstream has been quite calm for a while so it didn't take much time to catch up there
21:58
<vagrantc>
yeah.
21:58
looks like debian's freeze got postponed indefinitely...
21:59
<stgraber>
too many RC bugs ?
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22:00
<vagrantc>
yup
22:01
though i just downgraded the two LTSP related ones today...
22:01
both of which were really wishlist bugs in the end...
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23:20
<epaphus>
hello all
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