<html xmlns:v="urn:schemas-microsoft-com:vml" xmlns:o="urn:schemas-microsoft-com:office:office" xmlns:w="urn:schemas-microsoft-com:office:word" xmlns:m="http://schemas.microsoft.com/office/2004/12/omml" xmlns="http://www.w3.org/TR/REC-html40"><head><meta http-equiv=Content-Type content="text/html; charset=utf-8"><meta name=Generator content="Microsoft Word 15 (filtered medium)"><style><!--
/* Font Definitions */
@font-face
{font-family:"Cambria Math";
panose-1:2 4 5 3 5 4 6 3 2 4;}
@font-face
{font-family:Calibri;
panose-1:2 15 5 2 2 2 4 3 2 4;}
/* Style Definitions */
p.MsoNormal, li.MsoNormal, div.MsoNormal
{margin:0cm;
font-size:11.0pt;
font-family:"Calibri",sans-serif;}
a:link, span.MsoHyperlink
{mso-style-priority:99;
color:blue;
text-decoration:underline;}
span.EmailStyle21
{mso-style-type:personal-reply;
font-family:"Calibri",sans-serif;
color:windowtext;}
.MsoChpDefault
{mso-style-type:export-only;
font-size:10.0pt;
mso-ligatures:none;}
@page WordSection1
{size:612.0pt 792.0pt;
margin:70.85pt 3.0cm 70.85pt 3.0cm;}
div.WordSection1
{page:WordSection1;}
--></style><!--[if gte mso 9]><xml>
<o:shapedefaults v:ext="edit" spidmax="1026" />
</xml><![endif]--><!--[if gte mso 9]><xml>
<o:shapelayout v:ext="edit">
<o:idmap v:ext="edit" data="1" />
</o:shapelayout></xml><![endif]--></head><body lang=EN-GB link=blue vlink=purple style='word-wrap:break-word'><div class=WordSection1><p class=MsoNormal><span style='mso-fareast-language:EN-US'>This article is apparently how N1MM+ collects data about the nodes used <a href="https://n1mmwp.hamdocs.com/appendices/telnets-cluster-reporting-rating-feature/?hilite=packet+server+ratings">https://n1mmwp.hamdocs.com/appendices/telnets-cluster-reporting-rating-feature/?hilite=packet+server+ratings</a><o:p></o:p></span></p><p class=MsoNormal><span style='mso-fareast-language:EN-US'><o:p> </o:p></span></p><p class=MsoNormal><span style='mso-fareast-language:EN-US'>Some time ago I was surprised when I started to find users connected to GB7DXM who I didn’t know. It’s not a cluster that I promote, although equally I don’t lock it down – but it has custom config on it suited to our contest team – for example it doesn’t forward spots to the main network allowing us to spot things locally without worrying about irritating the masses with lots of trivial and duplicate spots, and has pretty aggressive RBN settings. Other people were then connecting to it because some of the team had been using N1MM+ and it had automatically added it to the valid connection list inside N1MM+! <o:p></o:p></span></p><p class=MsoNormal><span style='mso-fareast-language:EN-US'><o:p> </o:p></span></p><p class=MsoNormal><span style='mso-fareast-language:EN-US'>73<o:p></o:p></span></p><p class=MsoNormal><span style='mso-fareast-language:EN-US'><o:p> </o:p></span></p><p class=MsoNormal><span style='mso-fareast-language:EN-US'>Andy, G4PIQ<o:p></o:p></span></p><p class=MsoNormal><span style='mso-fareast-language:EN-US'><o:p> </o:p></span></p><p class=MsoNormal><span style='mso-fareast-language:EN-US'><o:p> </o:p></span></p><div><div style='border:none;border-top:solid #E1E1E1 1.0pt;padding:3.0pt 0cm 0cm 0cm'><p class=MsoNormal><b><span lang=EN-US>From:</span></b><span lang=EN-US> Dxspider-support <dxspider-support-bounces@tobit.co.uk> <b>On Behalf Of </b>Kin via Dxspider-support<br><b>Sent:</b> 03 December 2024 13:32<br><b>To:</b> 'The DXSpider Support list' <dxspider-support@tobit.co.uk>; 'The DXSpider Support list' <dxspider-support@dxcluster.org><br><b>Cc:</b> Kin <ea3cv@cronux.net><br><b>Subject:</b> Re: [Dxspider-support] Curiosities about network topology<o:p></o:p></span></p></div></div><p class=MsoNormal><o:p> </o:p></p><p class=MsoNormal><span lang=ES style='font-size:12.0pt;mso-fareast-language:EN-US'>Hi Rudy,<o:p></o:p></span></p><p class=MsoNormal><span lang=ES style='font-size:12.0pt;mso-fareast-language:EN-US'>The network is quite stable. There are many nodes that only reboot when there’s an update, and others never do :(<o:p></o:p></span></p><p class=MsoNormal><span lang=ES style='font-size:12.0pt;mso-fareast-language:EN-US'>With the advent of fiber optics and the high bandwidths we now have, even in the worst-case scenario, a spot will reach us "instantaneously." I don’t think a few milliseconds will cause us to miss a contest or a DXpedition.<o:p></o:p></span></p><p class=MsoNormal><span lang=ES style='font-size:12.0pt;mso-fareast-language:EN-US'>Regarding the data provided by N1MM about the nodes, I don’t know where it retrieves that information, but for the ones I manage, I can confirm the data is incorrect.<o:p></o:p></span></p><p class=MsoNormal><span lang=ES style='font-size:12.0pt;mso-fareast-language:EN-US'>A real cluster (3 nodes) in HA, with load balancing, hosted at a site with UPS, several gigabits of bandwidth, and so on, shows availability values ranging from 90% to 94%, despite being monitored 24/7/365. Simply impossible.<o:p></o:p></span></p><p class=MsoNormal><span lang=ES style='font-size:12.0pt;mso-fareast-language:EN-US'><o:p> </o:p></span></p><p class=MsoNormal><span lang=ES style='font-size:12.0pt;mso-fareast-language:EN-US'>73 de Kin<o:p></o:p></span></p><p class=MsoNormal><span lang=ES style='font-size:12.0pt;mso-fareast-language:EN-US'><o:p> </o:p></span></p><p class=MsoNormal><span lang=ES style='font-size:12.0pt;mso-fareast-language:EN-US'><o:p> </o:p></span></p><p class=MsoNormal><span lang=ES style='font-size:12.0pt;mso-fareast-language:EN-US'>EA3CV-2 dxcluster.cronux.net 7300<o:p></o:p></span></p><p class=MsoNormal><span lang=ES style='font-size:12.0pt;mso-fareast-language:EN-US'><a href="http://clustermap.cronux.net/map.html">http://clustermap.cronux.net/map.html</a><o:p></o:p></span></p><p class=MsoNormal><span lang=ES style='font-size:12.0pt;mso-fareast-language:EN-US'><o:p> </o:p></span></p><p class=MsoNormal><span lang=ES style='font-size:12.0pt;mso-fareast-language:EN-US'><o:p> </o:p></span></p><div><div style='border:none;border-top:solid #E1E1E1 1.0pt;padding:3.0pt 0cm 0cm 0cm'><p class=MsoNormal><b><span lang=ES>De:</span></b><span lang=ES> Dxspider-support <<a href="mailto:dxspider-support-bounces@tobit.co.uk">dxspider-support-bounces@tobit.co.uk</a>> <b>En nombre de </b>Rudy Bakalov via Dxspider-support<br><b>Enviado el:</b> martes, 3 de diciembre de 2024 11:59<br><b>Para:</b> The DXSpider Support list <<a href="mailto:dxspider-support@dxcluster.org">dxspider-support@dxcluster.org</a>><br><b>CC:</b> Rudy Bakalov <<a href="mailto:r_bakalov@yahoo.com">r_bakalov@yahoo.com</a>><br><b>Asunto:</b> Re: [Dxspider-support] Curiosities about network topology<o:p></o:p></span></p></div></div><p class=MsoNormal><span lang=ES><o:p> </o:p></span></p><div><p class=MsoNormal><span lang=ES>Quantity vs quality of partners- when nodes run on beat effort basis, they could go down at any time. On average, about 10% of my partners are down at any given time. It is also true that about 20% of them are rarely down, if ever.<o:p></o:p></span></p><div><p class=MsoNormal><span lang=ES><o:p> </o:p></span></p></div><div><p class=MsoNormal><span lang=ES>I find the dynamic nodes list in N1MM quite useful as it shows 1/how often users connect to each cluster and 2/cluster availability as experienced by users. It confirms that there are too many clusters.<o:p></o:p></span></p><div><p class=MsoNormal><span lang=ES><o:p> </o:p></span></p></div><div><p class=MsoNormal><span lang=ES>Rudy N2WQ<o:p></o:p></span></p></div><div><p class=MsoNormal><span lang=ES><o:p> </o:p></span></p><div><div><p class=MsoNormal><span lang=ES>Sent using a tiny keyboard. Please excuse brevity, typos, or inappropriate autocorrect.<o:p></o:p></span></p></div><div><p class=MsoNormal><span lang=ES><o:p> </o:p></span></p></div></div><div><p class=MsoNormal><span lang=ES><br><br><o:p></o:p></span></p><blockquote style='margin-top:5.0pt;margin-bottom:5.0pt'><p class=MsoNormal style='margin-bottom:12.0pt'><span lang=ES>On Dec 3, 2024, at 2:27 AM, IZ2LSC via Dxspider-support <<a href="mailto:dxspider-support@tobit.co.uk">dxspider-support@tobit.co.uk</a>> wrote:<o:p></o:p></span></p></blockquote></div><blockquote style='margin-top:5.0pt;margin-bottom:5.0pt'><div><p class=MsoNormal><span lang=ES><o:p></o:p></span></p><div><div><p class=MsoNormal><span lang=ES>This topic is very close to what happened with BGP (Border Gateway Protocol) that is the routing protocol that manages all the internet routes (so very solid, well designed, scalable).<br clear=all><o:p></o:p></span></p></div><div><p class=MsoNormal><span lang=ES>If we want to do something more structured we can take inspiration from BGP introducing the concept of Autonomous System, Route Reflector and Confederations.<o:p></o:p></span></p></div><div><p class=MsoNormal><span lang=ES><o:p> </o:p></span></p></div><div><p class=MsoNormal><span lang=ES>73<o:p></o:p></span></p></div><div><p class=MsoNormal><span lang=ES><o:p> </o:p></span></p></div><div><p class=MsoNormal><span lang=ES>Andrea<o:p></o:p></span></p></div><div><p class=MsoNormal><span lang=ES>iz2lsc<o:p></o:p></span></p></div><div><p class=MsoNormal><span lang=ES><o:p> </o:p></span></p></div><div><p class=MsoNormal><span lang=ES><o:p> </o:p></span></p></div><div><div><p class=MsoNormal><span lang=ES>--><o:p></o:p></span></p></div></div><p class=MsoNormal><span lang=ES><o:p> </o:p></span></p></div><p class=MsoNormal><span lang=ES><o:p> </o:p></span></p><div><div><p class=MsoNormal><span lang=ES>Il giorno lun 2 dic 2024 alle ore 22:13 Keith Maton via Dxspider-support <<a href="mailto:dxspider-support@tobit.co.uk">dxspider-support@tobit.co.uk</a>> ha scritto:<o:p></o:p></span></p></div><blockquote style='border:none;border-left:solid #CCCCCC 1.0pt;padding:0cm 0cm 0cm 6.0pt;margin-left:4.8pt;margin-top:5.0pt;margin-right:0cm;margin-bottom:5.0pt'><div><p class=MsoNormal><span lang=ES>Yeah, we have too many nodes and the nodes we have, have many more partners than they need. I’m as guilty of this as the next person.<o:p></o:p></span></p><div><p class=MsoNormal><span lang=ES><o:p> </o:p></span></p></div><div><p class=MsoNormal><span lang=ES>If someone asks me to be a partner node, I find it very difficult to turn them down, in fact, I don’t think I’ve rejected anyones request. If they’ve gone out of their way to ask me, they must have a reason for it so I think it’d be rude to reject it. I do now insist that they connect to me rather than vice versa.<o:p></o:p></span></p></div><div><p class=MsoNormal><span lang=ES><o:p> </o:p></span></p></div><div><p class=MsoNormal><span lang=ES>On the positive side it means we have a very robust system and huge chunks of it could fail but we’d all still get our spots, and we’d still get them quickly. <o:p></o:p></span></p></div><div><p class=MsoNormal><span lang=ES><o:p> </o:p></span></p></div><div><p class=MsoNormal><span lang=ES>73 Keith<o:p></o:p></span></p></div><div><p class=MsoNormal><span lang=ES><o:p> </o:p></span></p></div><div><div><p class=MsoNormal><span lang=ES><br><br><o:p></o:p></span></p><blockquote style='margin-top:5.0pt;margin-bottom:5.0pt'><div><p class=MsoNormal><span lang=ES>On 2 Dec 2024, at 17:59, Kin via Dxspider-support <<a href="mailto:dxspider-support@tobit.co.uk" target="_blank">dxspider-support@tobit.co.uk</a>> wrote:<o:p></o:p></span></p></div><p class=MsoNormal><span lang=ES><o:p> </o:p></span></p><div><div><p class=MsoNormal><span lang=ES>*snip*<o:p></o:p></span></p></div></div></blockquote><blockquote style='margin-top:5.0pt;margin-bottom:5.0pt'><div><div><p class=MsoNormal><span lang=ES> <o:p></o:p></span></p></div></div></blockquote><blockquote style='margin-top:5.0pt;margin-bottom:5.0pt'><div><div><p class=MsoNormal style='margin-bottom:12.0pt'><b><span lang=ES>Makes you think, doesn't it?</span></b><span lang=ES><o:p></o:p></span></p></div></div></blockquote></div><p class=MsoNormal><span lang=ES><o:p> </o:p></span></p></div></div><p class=MsoNormal><span lang=ES>_______________________________________________<br>Dxspider-support mailing list<br><a href="mailto:Dxspider-support@tobit.co.uk" target="_blank">Dxspider-support@tobit.co.uk</a><br><a href="https://mailman.tobit.co.uk/mailman/listinfo/dxspider-support" target="_blank">https://mailman.tobit.co.uk/mailman/listinfo/dxspider-support</a><o:p></o:p></span></p></blockquote></div><p class=MsoNormal><span lang=ES>_______________________________________________<br>Dxspider-support mailing list<br><a href="mailto:Dxspider-support@tobit.co.uk">Dxspider-support@tobit.co.uk</a><br><a href="https://mailman.tobit.co.uk/mailman/listinfo/dxspider-support">https://mailman.tobit.co.uk/mailman/listinfo/dxspider-support</a><o:p></o:p></span></p></div></blockquote></div></div></div></div></body></html>