<html><body style="word-wrap: break-word; -webkit-nbsp-mode: space; -webkit-line-break: after-white-space; "><div>Update:</div><div><br></div><div>So far, with only a few clients on the network, I can't tell how much difference there really is, but subjectively it seems much (much!) faster with compression enabled. Apps like Libre Office, when minimized and maximized, feel pretty much like working on the server.</div><div><br></div><div>Can anyone else please check this? It seems a worthwhile exercise to me. Why is it not enabled by default? </div><br><div><div>On 29 Aug 2011, at 12:10 PM, 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:0 0 0 .8ex;border-left:1px #ccc solid;padding-left:1ex;"> <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>-- <br>ubuntu-education mailing list<br><a href="mailto:ubuntu-education@lists.ubuntu.com">ubuntu-education@lists.ubuntu.com</a><br>Modify settings or unsubscribe at: https://lists.ubuntu.com/mailman/listinfo/ubuntu-education<br></blockquote></div><br><div> <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-align: auto; 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: 0; "><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></body></html>