From 396ffc08bd83efaa590a4016995b976d18cb4d78 Mon Sep 17 00:00:00 2001 From: Nick Mathewson Date: Fri, 13 Jun 2008 01:04:34 +0000 Subject: Add proposal 138: remove routers that are not Running from consensus documents. svn:r15175 --- .../138-remove-down-routers-from-consensus.txt | 49 ++++++++++++++++++++++ 1 file changed, 49 insertions(+) create mode 100644 proposals/138-remove-down-routers-from-consensus.txt (limited to 'proposals/138-remove-down-routers-from-consensus.txt') diff --git a/proposals/138-remove-down-routers-from-consensus.txt b/proposals/138-remove-down-routers-from-consensus.txt new file mode 100644 index 0000000..5abd287 --- /dev/null +++ b/proposals/138-remove-down-routers-from-consensus.txt @@ -0,0 +1,49 @@ +Filename: 138-remove-down-routers-from-consensus +Title: Remove routers that are not Running from consensus documents +Version: $Revision$ +Last-Modified: $Date$ +Author: Peter Palfrader +Created: 11-Jun-2008 +Status: Open + +1. Overview. + + Tor directory authorities hourly vote and agree on a consensus document + which lists all the routers on the network together with some of their + basic properties, like if a router is an exit node, whether it is + stable or whether it is a version 2 directory mirror. + + One of the properties given with each router is the 'Running' flag. + Clients do not use routers that are not listed as running. + + This proposal suggests that routers without the Running flag are not + listed at all. + +2. Current status + + At a typical bootstrap a client downloads a 140KB consensus, about + 10KB of certificates to verify that consensus, and about 1.6MB of + server descriptors, about half of which it requires before it will + start building circuits. + + Another proposal deals with how to get that huge 1.6MB fraction to + effectively zero (by downloading only individual descriptors, on + demand). Should that get successfully implemented that will leave the + 140KB compressed consensus as a large fraction of what a client needs + to get in order to work. + + About one third of the routers listed in a consensus are not running + and will therefor never be used by clients who use this consensus. + Not listing those routers will safe about 30% to 40% in size. + +3. Proposed change + + Authority directory servers produce vote documents that include all + the servers they know about, running or not, like they currently + do. In addition these vote documents also state that the authority + supports a new consensus forming method (method number 4). + + If more than two thirds of votes that an authority has received claim + they support method 4 then this new method will be used: The + consensus document is formed like before but a new last step removes + all routers from the listing that are not marked as Running. -- cgit v1.2.3-54-g00ecf