<html><body style="word-wrap: break-word; -webkit-nbsp-mode: space; -webkit-line-break: after-white-space; ">Hi David,<div><br></div><div>Yes I noticed the echo in here. ;-)</div><div><br></div><div>Actually I found the answer I was looking for. The parameter NETWORK_COMPRESSION = True does the trick. </div><div><br></div><div>It's disabled by default according to <a href="http://manpages.ubuntu.com/manpages/lucid/man5/lts.conf.5.html">http://manpages.ubuntu.com/manpages/lucid/man5/lts.conf.5.html</a></div><div><br></div><div><span class="Apple-style-span" style="color: rgb(51, 51, 51); font-size: 12px; line-height: 16px; white-space: pre; "><u>NETWORK_COMPRESSION</u></span></div><meta charset="utf-8"><pre style="margin-top: 0px; margin-right: 0px; margin-bottom: 0px; margin-left: 0px; padding-top: 0px; padding-right: 0px; padding-bottom: 0px; padding-left: 0px; border-top-width: 0px; border-right-width: 0px; border-bottom-width: 0px; border-left-width: 0px; border-style: initial; border-color: initial; font-weight: normal; font-style: normal; font-size: 12px; line-height: 16px; font-family: inherit; text-align: left; vertical-align: baseline; color: rgb(51, 51, 51); font-variant: normal; letter-spacing: normal; orphans: 2; text-indent: 0px; text-transform: none; widows: 2; word-spacing: 0px; -webkit-text-size-adjust: auto; -webkit-text-stroke-width: 0px; background-color: rgb(247, 247, 247); position: static; z-index: auto; "> boolean, default <u>False</u> Enables compression of the SSH traffic over the network. Note that while this will reduce your network traffic, it will increase your cpu load.</pre><div><br><div><div><br></div><div>I've yet to test it with more than half a dozen terminals, but from what I can tell so far it is a well worthwhile trade. You should try it. :)</div><div><br></div><div>Cheers,</div><div><br></div><div>Jeff</div><div><br></div><div>P.S. Hey Jonathan, how's Canada? Hope you don't mind but I thought I'd CC you in to solicit your comment if possible. </div><div><br></div><div><br></div><div><br></div><div><br></div><div>On 31 Aug 2011, at 12:04 AM, David Groos wrote:</div><br class="Apple-interchange-newline"><blockquote type="cite"><div style="word-wrap: break-word; -webkit-nbsp-mode: space; -webkit-line-break: after-white-space; ">Hi Jeff,<div><br><div>I'm thinking I hadn't understood what you were asking for--NX is an application to do remote access, like tight-vnc. Sounds like you want to compress the video as it gets sent over the network as part of the normal LTSP thin client process. Yes?</div><div><br></div><div>Compression is part and parcel of the LTSP thin client system, I think. For questions like you are asking, I would recommend that you jump on some irc application like pidgin internet messenger and go to the #ltsp room and ask your question on line. It is much more active than the #edubuntu room and it seems that most all of my questions seem to be about ltsp :-) This list server has been kinda thin on answers lately.</div><div><br></div><div>Good luck on tracking down some satisfaction.</div><div>David</div><div><br><div><div>On Aug 29, 2011, at 5:10 AM, Jeff wrote:</div><br class="Apple-interchange-newline"><blockquote type="cite"><div style="word-wrap: break-word; -webkit-nbsp-mode: space; -webkit-line-break: after-white-space; ">Thanks for the input, David.<div><br></div><div>Still getting my head around *NX. Can the client work from the thin-clients without loading a windowing system?</div><div><br></div><div>In the meantime, I found this article <a href="http://ubuntuforums.org/archive/index.php/t-368869.html">http://ubuntuforums.org/archive/index.php/t-368869.html</a> about compression.</div><div><br></div><div>Looking around the configuration files I don't see any compression enabled in /var/lib/tftpboot/ltsp/i386/lts.conf so I've added:</div><div><br></div><div><div>## SSH compression between LTSP client and server</div><div>NETWORK_COMPRESSION = True </div><div><br></div><div>remotely, but haven't been onsite to test it yet.</div><div><br></div><div>/var/lib/tftpboot/ltsp/i386/config-2.6.38-8-generic has several compression parameters, but nothing explicitly about SSH from what I can see.</div><div><br></div><div>Will post an update when I've had a chance to test.</div><div><br></div><div>Cheers,</div><div><br></div><div>Jeff</div></div><div><br></div><div><br></div><div><div><div><br></div><div><br></div><div>On 24 Aug 2011, at 3:24 PM, David Groos wrote:</div><br class="Apple-interchange-newline"><blockquote type="cite">Hey Jeff, Sounds like you are looking for good gui remote access over ssh? I use FreeNX as the server and use NoMachine's client and now also use OpenNX since it works well with lion-10.7. The access over broadband internet is just like sitting at the computer--works great to manage remote servers running Edubuntu/ltsp. I hear it is even a decent experience over dial-up. So, while I don't know what the compression is, it must be pretty good to work this well in this situation. If you have more questions, let me know.<br> David<br><br><div class="gmail_quote">On Wed, Aug 24, 2011 at 7:15 AM, Jeff <span dir="ltr"><<a href="mailto:jeff@wildcoast.com">jeff@wildcoast.com</a>></span> wrote:<br><blockquote class="gmail_quote" style="margin-top: 0px; margin-right: 0px; margin-bottom: 0px; margin-left: 0.8ex; border-left-width: 1px; border-left-color: rgb(204, 204, 204); border-left-style: solid; padding-left: 1ex; position: static; z-index: auto; "> <div style="word-wrap:break-word">Hi all,<div><br></div><div>I don't have easy access to a server at the minute, and not sure where the settings are anyway; but I've been wondering about this for a while and am just hoping that someone can point me in the right direction:</div> <div><br></div><div>A week or so ago when I was onsite at a school, I ran a binary tcpdump to get an indication of network usage with approximately 12 thin clients working.</div><div><br></div><div>It wasn't a very precisely measured test or anything, but the server sent/received a Gigabyte of traffic in about a couple of minutes.</div> <div><br></div><div>So I'm just wondering whether SSH compression is enabled by default or not? And if it is, whether there's any way to tweak it?</div><div><br></div><div>Also, it occurs to me that SSH compression would have to be lossless, by nature. So I'm wondering if there's any way to get something like tight-vnc working; or whether we should try a lightweight X desktop like XFCE?</div> <div><br></div><div>I'm not really happy about the performance, compared to terminal server, for ex, or even the old Fedora/Gnome K12-LTSP we upgraded from.</div><div><br></div><div>Insights and pointers appreciated. Flames > /dev/null</div> <div><br></div><div>;-)</div><div><br><font color="#888888"><div> <span style="border-collapse:separate;color:rgb(0, 0, 0);font-family:Helvetica;font-size:12px;font-style:normal;font-variant:normal;font-weight:normal;letter-spacing:normal;line-height:normal;text-align:auto;text-indent:0px;text-transform:none;white-space:normal;word-spacing:0px"><div style="word-wrap:break-word"> <span style="border-collapse:separate;color:rgb(0, 0, 0);font-family:Helvetica;font-size:12px;font-style:normal;font-variant:normal;font-weight:normal;letter-spacing:normal;line-height:normal;text-indent:0px;text-transform:none;white-space:normal;word-spacing:0px"><div style="word-wrap:break-word"> <div><div><div><font face="Courier">--</font></div><div><font face="Courier">Jeff Brown</font></div><div><font face="Courier"><br></font></div><div><font face="Courier">Tel:<a href="tel:%2B27-74-101%205170" value="+27741015170" target="_blank">+27-74-101 5170</a></font></div> <div><font face="Courier">Fax:<a href="tel:%2B27-86-532%203508" value="+27865323508" target="_blank">+27-86-532 3508</a></font></div><div><font face="Courier"><a href="http://www.wildcoast.co.za/" target="_blank">www.wildcoast.co.za</a></font></div> <div><font face="Courier"><br></font></div></div></div></div></span></div></span><br> </div></font></div></div></blockquote></div></blockquote></div><br></div></div></blockquote></div><br></div></div></div></blockquote></div><br><div> <span class="Apple-style-span" style="font-size: 12px; "><div style="word-wrap: break-word; -webkit-nbsp-mode: space; -webkit-line-break: after-white-space; "><span class="Apple-style-span" style="border-collapse: separate; color: rgb(0, 0, 0); font-family: Helvetica; font-size: 12px; font-style: normal; font-variant: normal; font-weight: normal; letter-spacing: normal; line-height: normal; orphans: 2; text-indent: 0px; text-transform: none; white-space: normal; widows: 2; word-spacing: 0px; -webkit-border-horizontal-spacing: 0px; -webkit-border-vertical-spacing: 0px; -webkit-text-decorations-in-effect: none; -webkit-text-size-adjust: auto; -webkit-text-stroke-width: 0px; "><div style="word-wrap: break-word; -webkit-nbsp-mode: space; -webkit-line-break: after-white-space; "><div><div><div><font class="Apple-style-span" face="Courier">--</font></div><div><font class="Apple-style-span" face="Courier">Jeff Brown</font></div><div><font class="Apple-style-span" face="Courier"><br></font></div><div><font class="Apple-style-span" face="Courier">Tel:+27-74-101 5170</font></div><div><font class="Apple-style-span" face="Courier">Fax:+27-86-532 3508</font></div><div><font class="Apple-style-span" face="Courier"><a href="http://www.wildcoast.co.za/">www.wildcoast.co.za</a></font></div><div><font class="Apple-style-span" face="Courier"><br></font></div></div></div></div></span></div></span><br class="Apple-interchange-newline"> </div><br></div></body></html>