IRC chat logs for #ltsp on irc.libera.chat (webchat)
Channel log from 29 September 2015 (all times are UTC)
| 00:46 | vervelak has left IRC (vervelak!~vervelak@139.91.248.3, Ping timeout: 246 seconds) | |
| 00:47 | vervelak has joined IRC (vervelak!~vervelak@139.91.248.3) | |
| 00:47 | work_alkisg has left IRC (work_alkisg!~alkisg@srv1-dide.ioa.sch.gr, Ping timeout: 246 seconds) | |
| 00:52 | gbaman has left IRC (gbaman!~gbaman@cpc15-belf9-2-0-cust171.2-1.cable.virginm.net, Remote host closed the connection) | |
| 00:53 | gbaman has joined IRC (gbaman!~gbaman@cpc15-belf9-2-0-cust171.2-1.cable.virginm.net) | |
| 00:57 | gbaman has left IRC (gbaman!~gbaman@cpc15-belf9-2-0-cust171.2-1.cable.virginm.net, Ping timeout: 256 seconds) | |
| 01:04 | ben_roose has left IRC (ben_roose!~roose@roose.cs.wichita.edu, Remote host closed the connection) | |
| 01:54 | gbaman has joined IRC (gbaman!~gbaman@cpc15-belf9-2-0-cust171.2-1.cable.virginm.net) | |
| 01:59 | gbaman has left IRC (gbaman!~gbaman@cpc15-belf9-2-0-cust171.2-1.cable.virginm.net, Ping timeout: 246 seconds) | |
| 02:08 | Freejack has joined IRC (Freejack!~Freejack@unaffiliated/freejack) | |
| 03:57 | gbaman has joined IRC (gbaman!~gbaman@cpc15-belf9-2-0-cust171.2-1.cable.virginm.net) | |
| 04:01 | gbaman has left IRC (gbaman!~gbaman@cpc15-belf9-2-0-cust171.2-1.cable.virginm.net, Ping timeout: 240 seconds) | |
| 04:27 | stgraber has left IRC (stgraber!~stgraber@ubuntu/member/stgraber, Quit: kernel update) | |
| 04:34 | stgraber has joined IRC (stgraber!~stgraber@shell.stgraber.org) | |
| 04:35 | stgraber has left IRC (stgraber!~stgraber@shell.stgraber.org, Changing host) | |
| 04:35 | stgraber has joined IRC (stgraber!~stgraber@ubuntu/member/stgraber) | |
| 04:38 | quinox has left IRC (quinox!~quinox@ghost.qtea.nl, Quit: :wq) | |
| 04:58 | gbaman has joined IRC (gbaman!~gbaman@cpc15-belf9-2-0-cust171.2-1.cable.virginm.net) | |
| 05:03 | gbaman has left IRC (gbaman!~gbaman@cpc15-belf9-2-0-cust171.2-1.cable.virginm.net, Ping timeout: 268 seconds) | |
| 05:09 | quinox has joined IRC (quinox!~quinox@ghost.qtea.nl) | |
| 05:23 | ricotz has joined IRC (ricotz!~rico@ubuntu/member/ricotz) | |
| 05:44 | mikkel has joined IRC (mikkel!~mikkel@mail.dlvs.dk) | |
| 05:52 | khildin has joined IRC (khildin!~khildin@ip-62-235-41-221.dial.scarlet.be) | |
| 06:00 | gbaman has joined IRC (gbaman!~gbaman@cpc15-belf9-2-0-cust171.2-1.cable.virginm.net) | |
| 06:04 | khildin has left IRC (khildin!~khildin@ip-62-235-41-221.dial.scarlet.be, Ping timeout: 246 seconds) | |
| 06:04 | gbaman has left IRC (gbaman!~gbaman@cpc15-belf9-2-0-cust171.2-1.cable.virginm.net, Ping timeout: 250 seconds) | |
| 06:22 | khildin has joined IRC (khildin!~khildin@ip-62-235-41-221.dial.scarlet.be) | |
| 06:22 | vmlintu has joined IRC (vmlintu!~vmlintu@a91-152-200-13.elisa-laajakaista.fi) | |
| 06:25 | ricotz has left IRC (ricotz!~rico@ubuntu/member/ricotz, Quit: Ex-Chat) | |
| 06:41 | work_alkisg has joined IRC (work_alkisg!~alkisg@srv1-dide.ioa.sch.gr) | |
| 06:41 | work_alkisg is now known as alkisg | |
| 06:52 | fnurl has left IRC (fnurl!650e808a@gateway/web/freenode/ip.101.14.128.138, Ping timeout: 246 seconds) | |
| 07:00 | gbaman has joined IRC (gbaman!~gbaman@cpc15-belf9-2-0-cust171.2-1.cable.virginm.net) | |
| 07:04 | gbaman has left IRC (gbaman!~gbaman@cpc15-belf9-2-0-cust171.2-1.cable.virginm.net, Ping timeout: 246 seconds) | |
| 07:10 | ricotz has joined IRC (ricotz!~rico@ubuntu/member/ricotz) | |
| 07:37 | gvy has joined IRC (gvy!~mike@altlinux/developer/mike) | |
| 08:01 | gbaman has joined IRC (gbaman!~gbaman@cpc15-belf9-2-0-cust171.2-1.cable.virginm.net) | |
| 08:09 | gbaman has left IRC (gbaman!~gbaman@cpc15-belf9-2-0-cust171.2-1.cable.virginm.net, Ping timeout: 260 seconds) | |
| 08:11 | <alkisg> !arcfour
| |
| 08:11 | <ltsp> arcfour: http://en.wikipedia.org/wiki/RC4 is an SSH cipher which is more than 2 times faster than the default aes128-ctr. To enable it, set LDM_SSHOPTIONS="-o Ciphers=arcfour128".
| |
| 08:12 | <alkisg> !forget arcfour
| |
| 08:12 | <ltsp> The operation succeeded.
| |
| 08:12 | <alkisg> !learn arcfour as http://en.wikipedia.org/wiki/RC4 is an SSH cipher which is more than 2 times faster than the default aes128-ctr. To enable it, set LDM_SSHOPTIONS="-o Ciphers=arcfour128,chacha20-poly1305@openssh.com,aes128-ctr".
| |
| 08:12 | <ltsp> The operation succeeded.
| |
| 08:12 | <alkisg> !arcfour
| |
| 08:12 | <ltsp> arcfour: http://en.wikipedia.org/wiki/RC4 is an SSH cipher which is more than 2 times faster than the default aes128-ctr. To enable it, set LDM_SSHOPTIONS="-o Ciphers=arcfour128,chacha20-poly1305@openssh.com,aes128-ctr".
| |
| 08:13 | * alkisg is testing chacha in pentium 3's... | |
| 08:15 | <maldridge> do you have those in production, or is this more academic?
| |
| 08:15 | NeonLicht has joined IRC (NeonLicht!~NeonLicht@darwin.ugr.es) | |
| 08:16 | <alkisg> Yup, thousands of them
| |
| 08:16 | <maldridge> wow, that's quite the inventory
| |
| 08:16 | are they decently fast?
| |
| 08:16 | <alkisg> Real life... :)
| |
| 08:17 | Well, thin clients depend on the server CPU...
| |
| 08:17 | If a schools gets an i7 server, then the students can watch youtube in p3's
| |
| 08:17 | <maldridge> well yeah, but they still have to have decent network and local graphics
| |
| 08:17 | <alkisg> 100mbps network for them, gigabit for the server
| |
| 08:19 | With 128 ram, they prefer ubuntu/ltsp over windows 2000
| |
| 08:19 | With 256 ram, they prefer ubuntu/ltsp over windows xp
| |
| 08:19 | With < 128 RAM unfortunately they cannot run ubuntu/ltsp any longer
| |
| 08:19 | <maldridge> huh, that's really impressive
| |
| 08:20 | <alkisg> So we're advising them to throw away anything with SIMMs, and upgrade anything with SDRAM to >=128 and make it a thin clien,t
| |
| 08:20 | and upgrade anything with >= DDR-1 to 1 GB RAM and make it a fat client
| |
| 08:21 | gbaman has joined IRC (gbaman!~gbaman@cpc15-belf9-2-0-cust171.2-1.cable.virginm.net) | |
| 08:26 | gbaman has left IRC (gbaman!~gbaman@cpc15-belf9-2-0-cust171.2-1.cable.virginm.net, Ping timeout: 272 seconds) | |
| 08:56 | <alkisg> Test method: LTSP client root file system: cd /tmp; truncate -s 512M file #create a sparse file
| |
| 08:56 | time scp -o Ciphers=aes128-ctr /tmp/file alkisg@server:/dev/null
| |
| 08:56 | real 1m43.958s
| |
| 08:59 | (network at 100 mbps, cpu always at 100% due to ssh+scp usage)
| |
| 08:59 | time scp -o Ciphers=arcfour /tmp/file alkisg@server:/dev/null
| |
| 08:59 | real 1m18.212s
| |
| 09:01 | <maldridge> wow, that's quite impressive
| |
| 09:02 | <alkisg> time scp -o Ciphers=chacha20-poly1305@openssh.com /tmp/file alkisg@server:/dev/null
| |
| 09:02 | real 1m36.121s
| |
| 09:02 | So, aes128=5.0MB/s, arcfour=6.7MB/s, chacha20-poly1305@openssh.com=5.5MB/s
| |
| 09:03 | Let me see about the opposite, decoding on a slow client...
| |
| 09:04 | * highvoltage has his LAN on home configured to always use arcfour in .ssh/config (makes a huge difference in performance, at least I know no one else is in my switches) | |
| 09:05 | <alkisg> Testing decoding - this time only 100M sparse file: time scp -o Ciphers=chacha20-poly1305@openssh.com alkisg@server:/run/sparse /dev/null
| |
| 09:05 | real 0m22.472s
| |
| 09:06 | 5,0 MB/s
| |
| 09:06 | time scp -o Ciphers=arcfour alkisg@server:/run/sparse /dev/null
| |
| 09:06 | real 0m18.708s, 5.9MB/s
| |
| 09:06 | time scp -o Ciphers=aes128-ctr alkisg@server:/run/sparse /dev/null
| |
| 09:07 | real 0m23.814s, 4.6MB/s
| |
| 09:07 | So arcfour is a big winner there as well
| |
| 09:08 | The good side is that normal ltsp users that don't set LDM_SSHOPTIONS will actually see better results in 16.04 with chacha being the default now
| |
| 09:08 | <highvoltage> yeah it's really easily breakable encryption but it's certainly better than everything going over the network in the clear
| |
| 09:09 | * alkisg wonders why is so much CPU necessary for encryption... | |
| 09:24 | uXuss has joined IRC (uXuss!~uXus@217.77.222.72) | |
| 09:25 | uXus has left IRC (uXus!~uXus@217.77.222.72, Ping timeout: 264 seconds) | |
| 09:27 | <maldridge> alkisg: most encryption derives entropy from the interrupt routines
| |
| 09:27 | <alkisg> I'm guessing that's true only for the initial setup
| |
| 09:28 | If I want to scp 10 TB and I leave my PC while doing so, I'm not expecting scp to wait and ask for more entropy...
| |
| 09:28 | After the initial handshake, the peers can have a common encryption array of e.g. 10k size
| |
| 09:29 | So I'm wondering why they can't use that with a simpler, XOR+count+stuff like that, technique...
| |
| 09:30 | (the best encryption is when the peers have a common array of size=the size of data to be transmitted, that's completely unbreakable even with simple xor)
| |
| 09:32 | <vmlintu> alkisg: if you have something stuck waiting for entropy, rng-tools is your friend
| |
| 09:33 | <alkisg> vmlintu: nah, I'm just wondering why SSH, SSHFS etc _have_ to be so damn slow, requiring so much CPU
| |
| 09:37 | <vmlintu> Long time ago on thin clients with some VIA CPU we used its built-in AES chipset that was really fast. You really couldn't notice the difference between unencrypted X and X over ipsec..
| |
| 09:41 | Back then using ipsec was much faster than anything ssh could do. I wonder if it's still so..
| |
| 09:59 | <alkisg> Unfortunately the ssh devs won't want to include the NULL cipher, so even if we use ipsec, ssh will need its CPU again...
| |
| 10:03 | fnurl has joined IRC (fnurl!650ee5ca@gateway/web/freenode/ip.101.14.229.202) | |
| 10:09 | lbssousa has joined IRC (lbssousa!~laercio@177.34.193.216) | |
| 10:15 | fnurl has left IRC (fnurl!650ee5ca@gateway/web/freenode/ip.101.14.229.202) | |
| 10:29 | anagom has joined IRC (anagom!c1907f0d@gateway/web/freenode/ip.193.144.127.13) | |
| 10:48 | alkisg is now known as work_alkisg | |
| 11:29 | adrianorg has left IRC (adrianorg!~adrianorg@177.132.223.72, Ping timeout: 252 seconds) | |
| 11:30 | lbssousa has left IRC (lbssousa!~laercio@177.34.193.216, Quit: lbssousa) | |
| 11:30 | lbssousa has joined IRC (lbssousa!~laercio@177.34.193.216) | |
| 11:31 | adrianorg has joined IRC (adrianorg!~adrianorg@186.213.153.83) | |
| 11:33 | work_alkisg is now known as alkisg | |
| 11:33 | Grembler has joined IRC (Grembler!~Ben@cpc29-aztw22-2-0-cust128.18-1.cable.virginm.net) | |
| 11:37 | uXus has joined IRC (uXus!~uXus@217.77.222.72) | |
| 11:38 | uXuss has left IRC (uXuss!~uXus@217.77.222.72, Ping timeout: 268 seconds) | |
| 11:43 | danau111 has joined IRC (danau111!~durban@66.251.57.114) | |
| 11:44 | gbaman has joined IRC (gbaman!~gbaman@104.40.144.249) | |
| 11:45 | danau111 has left IRC (danau111!~durban@66.251.57.114) | |
| 11:54 | Faith has joined IRC (Faith!~paty_@unaffiliated/faith) | |
| 12:03 | gbaman has left IRC (gbaman!~gbaman@104.40.144.249, Ping timeout: 264 seconds) | |
| 12:03 | alkisg is now known as work_alkisg | |
| 12:07 | lbssousa has left IRC (lbssousa!~laercio@177.34.193.216) | |
| 12:19 | Grembler has left IRC (Grembler!~Ben@cpc29-aztw22-2-0-cust128.18-1.cable.virginm.net, Quit: I Leave) | |
| 12:48 | Phantomas has joined IRC (Phantomas!~ftsamis@ubuntu/member/phantomas) | |
| 13:14 | lbssousa has joined IRC (lbssousa!~laercio@177.34.193.216) | |
| 13:15 | gbaman has joined IRC (gbaman!~gbaman@cpc15-belf9-2-0-cust171.2-1.cable.virginm.net) | |
| 13:19 | Grembler has joined IRC (Grembler!~Ben@cpc29-aztw22-2-0-cust128.18-1.cable.virginm.net) | |
| 13:25 | Grembler has left IRC (Grembler!~Ben@cpc29-aztw22-2-0-cust128.18-1.cable.virginm.net, Quit: I Leave) | |
| 13:36 | cyberorg has left IRC (cyberorg!~cyberorg@opensuse/member/Cyberorg, Ping timeout: 250 seconds) | |
| 13:49 | ben_roose has joined IRC (ben_roose!~roose@roose.cs.wichita.edu) | |
| 13:57 | mikkel has left IRC (mikkel!~mikkel@mail.dlvs.dk, Quit: Leaving) | |
| 13:57 | cyberorg has joined IRC (cyberorg!~cyberorg@opensuse/member/Cyberorg) | |
| 13:58 | gbaman has left IRC (gbaman!~gbaman@cpc15-belf9-2-0-cust171.2-1.cable.virginm.net, Remote host closed the connection) | |
| 14:41 | Grembler has joined IRC (Grembler!~Ben@cpc29-aztw22-2-0-cust128.18-1.cable.virginm.net) | |
| 14:42 | danau11 has joined IRC (danau11!~durban@12.197.179.122) | |
| 15:08 | danau11 has left IRC (danau11!~durban@12.197.179.122) | |
| 15:12 | gbaman has joined IRC (gbaman!~gbaman@104.40.144.249) | |
| 15:18 | khildin has left IRC (khildin!~khildin@ip-62-235-41-221.dial.scarlet.be, Read error: Connection reset by peer) | |
| 15:34 | khildin has joined IRC (khildin!~khildin@ip-213-49-87-70.dsl.scarlet.be) | |
| 15:52 | Mike has joined IRC (Mike!62f8d5f4@gateway/web/freenode/ip.98.248.213.244) | |
| 15:52 | Mike is now known as Guest48648 | |
| 15:54 | <Guest48648> Hello, I have a question about client image size. I've done 4 updates to the system and the image is now seems to be 14506Mb. How do I reduce it?
| |
| 15:59 | gbaman has left IRC (gbaman!~gbaman@104.40.144.249, Remote host closed the connection) | |
| 16:04 | khildin has left IRC (khildin!~khildin@ip-213-49-87-70.dsl.scarlet.be, Ping timeout: 244 seconds) | |
| 16:21 | gbaman has joined IRC (gbaman!~gbaman@cpc15-belf9-2-0-cust171.2-1.cable.virginm.net) | |
| 16:22 | gbaman_ has joined IRC (gbaman_!~gbaman@104.40.144.249) | |
| 16:24 | gbaman has left IRC (gbaman!~gbaman@cpc15-belf9-2-0-cust171.2-1.cable.virginm.net, Read error: Connection reset by peer) | |
| 16:25 | gbaman has joined IRC (gbaman!~gbaman@cpc15-belf9-2-0-cust171.2-1.cable.virginm.net) | |
| 16:28 | gbaman_ has left IRC (gbaman_!~gbaman@104.40.144.249, Ping timeout: 246 seconds) | |
| 16:38 | Guest48648 has left IRC (Guest48648!62f8d5f4@gateway/web/freenode/ip.98.248.213.244, Ping timeout: 246 seconds) | |
| 16:52 | john_s has joined IRC (john_s!4c68f7e1@gateway/web/freenode/ip.76.104.247.225) | |
| 16:54 | <john_s> just installed Edubuntu based on Ubuntu LTS 14.04, I need to run chromium-browser as a local app, which works but it runs like a dog on our TC's with Atom processors. Does any one know if there is a way to run chromium-browser in a "lightweight
| |
| 16:54 | mode
| |
| 16:56 | john_s_ has joined IRC (john_s_!4c68f7e1@gateway/web/freenode/ip.76.104.247.225) | |
| 16:58 | john_s has left IRC (john_s!4c68f7e1@gateway/web/freenode/ip.76.104.247.225, Ping timeout: 246 seconds) | |
| 17:00 | vagrantc has joined IRC (vagrantc!~vagrant@unaffiliated/vagrantc) | |
| 17:06 | john_s_ has left IRC (john_s_!4c68f7e1@gateway/web/freenode/ip.76.104.247.225, Ping timeout: 246 seconds) | |
| 17:09 | khildin has joined IRC (khildin!~khildin@ip-213-49-87-70.dsl.scarlet.be) | |
| 18:14 | NeonLicht has left IRC (NeonLicht!~NeonLicht@darwin.ugr.es, Remote host closed the connection) | |
| 18:15 | khildin has left IRC (khildin!~khildin@ip-213-49-87-70.dsl.scarlet.be, Ping timeout: 250 seconds) | |
| 18:34 | gvy has left IRC (gvy!~mike@altlinux/developer/mike, Quit: Leaving) | |
| 18:36 | work_alkisg is now known as alkisg | |
| 18:56 | vagrantc has left IRC (vagrantc!~vagrant@unaffiliated/vagrantc, Quit: leaving) | |
| 18:57 | Grembler has left IRC (Grembler!~Ben@cpc29-aztw22-2-0-cust128.18-1.cable.virginm.net, Quit: I Leave) | |
| 19:16 | gbaman has left IRC (gbaman!~gbaman@cpc15-belf9-2-0-cust171.2-1.cable.virginm.net, Remote host closed the connection) | |
| 19:17 | khildin has joined IRC (khildin!~khildin@ip-213-49-87-70.dsl.scarlet.be) | |
| 19:20 | alkisg is now known as work_alkisg | |
| 19:23 | gbaman has joined IRC (gbaman!~gbaman@cpc15-belf9-2-0-cust171.2-1.cable.virginm.net) | |
| 19:30 | gbaman has left IRC (gbaman!~gbaman@cpc15-belf9-2-0-cust171.2-1.cable.virginm.net, Remote host closed the connection) | |
| 19:42 | khildin has left IRC (khildin!~khildin@ip-213-49-87-70.dsl.scarlet.be, Quit: I'm gone, bye bye) | |
| 20:05 | gbaman has joined IRC (gbaman!~gbaman@82.14.86.172) | |
| 20:10 | lbssousa has left IRC (lbssousa!~laercio@177.34.193.216, Quit: lbssousa) | |
| 20:12 | gbaman has left IRC (gbaman!~gbaman@82.14.86.172, Remote host closed the connection) | |
| 20:19 | gbaman has joined IRC (gbaman!~gbaman@cpc15-belf9-2-0-cust171.2-1.cable.virginm.net) | |
| 20:29 | tsuyoshi has left IRC (tsuyoshi!~tsuyoshi@hikaru.yumegakanau.org, Ping timeout: 246 seconds) | |
| 20:30 | tsuyoshi has joined IRC (tsuyoshi!~tsuyoshi@hikaru.yumegakanau.org) | |
| 20:48 | gbaman has left IRC (gbaman!~gbaman@cpc15-belf9-2-0-cust171.2-1.cable.virginm.net, Remote host closed the connection) | |
| 20:54 | vmlintu has left IRC (vmlintu!~vmlintu@a91-152-200-13.elisa-laajakaista.fi, Ping timeout: 252 seconds) | |
| 21:02 | ricotz has left IRC (ricotz!~rico@ubuntu/member/ricotz, Quit: Ex-Chat) | |
| 21:02 | Faith has left IRC (Faith!~paty_@unaffiliated/faith, Quit: Leaving) | |
| 21:10 | gbaman has joined IRC (gbaman!~gbaman@members.unit1.farsetlabs.org.uk) | |
| 21:22 | gbaman_ has joined IRC (gbaman_!~gbaman@members.unit1.farsetlabs.org.uk) | |
| 21:26 | gbaman has left IRC (gbaman!~gbaman@members.unit1.farsetlabs.org.uk, Ping timeout: 268 seconds) | |
| 22:14 | Phantomas has left IRC (Phantomas!~ftsamis@ubuntu/member/phantomas, Quit: Leaving.) | |
| 22:23 | ben_roose has left IRC (ben_roose!~roose@roose.cs.wichita.edu, Remote host closed the connection) | |
| 23:09 | Icedmang has left IRC (Icedmang!ae018962@gateway/web/freenode/ip.174.1.137.98, Ping timeout: 246 seconds) | |
| 23:33 | pppingme has left IRC (pppingme!~pppingme@unaffiliated/pppingme, Ping timeout: 246 seconds) | |
| 23:36 | pppingme has joined IRC (pppingme!~pppingme@unaffiliated/pppingme) | |
| 23:49 | gbaman has joined IRC (gbaman!~gbaman@members.unit1.farsetlabs.org.uk) | |
| 23:52 | gbaman_ has left IRC (gbaman_!~gbaman@members.unit1.farsetlabs.org.uk, Ping timeout: 260 seconds) | |
| 23:59 | gbaman has left IRC (gbaman!~gbaman@members.unit1.farsetlabs.org.uk, Remote host closed the connection) | |