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| author | George Kadianakis <desnacked@riseup.net> | 2014-08-31 16:27:35 +0300 |
|---|---|---|
| committer | Nick Mathewson <nickm@torproject.org> | 2014-09-01 16:19:44 -0400 |
| commit | 7647f6d4de98acae6b71782648b0a646f11b146a (patch) | |
| tree | 285d7a5b9d699a7ca7ce08b75f0b6a9cd06d8dba /proposals/236-single-guard-node.txt | |
| parent | d4cb76a81f26dcc41a2c2041b12977dfdf62c3f8 (diff) | |
| download | torspec-7647f6d4de98acae6b71782648b0a646f11b146a.tar.gz torspec-7647f6d4de98acae6b71782648b0a646f11b146a.zip | |
Specify how Guard Fraction voting should occur.
Diffstat (limited to 'proposals/236-single-guard-node.txt')
| -rw-r--r-- | proposals/236-single-guard-node.txt | 26 |
1 files changed, 21 insertions, 5 deletions
diff --git a/proposals/236-single-guard-node.txt b/proposals/236-single-guard-node.txt index d7c03d3..32327db 100644 --- a/proposals/236-single-guard-node.txt +++ b/proposals/236-single-guard-node.txt @@ -110,12 +110,14 @@ Status: Open To do so, everytime an authority needs to vote for a guard, it reads a set of consensus documents spanning the past NNN months, where NNN is the number of months in the guard rotation period (10 - months if this proposal is adopted in full) and calculates the - visibility of the guard; that is, in how many consensuses it has - had the guard flag. + months if this proposal is adopted in full) and calculates in how + many consensuses it has had the guard flag for. - The authorities include the age of each guard by appending - '[SP "GV=" INT]' in the guard's "w" line. + Then, in their votes, the authorities include the Guard Fraction of + each guard by appending '[SP "GuardFraction=" INT]' in the guard's + "w" line. Its value is an integer between 0 and 100, with 0 meaning + that it's a brand new guard, and 100 that it has been present in + all the inspected consensuses. A guard N that has been visible for V out of NNN*30*24 consensuses has had the opportunity to be chosen as a guard by approximately @@ -142,6 +144,20 @@ Status: Open D' = D + F*B, if N has the exit flag E' = E + (1-F)*B, if N has the exit flag +1.3.1. Guard Fraction voting + + To pass that information to clients, we introduce consensus method + 19, where if 3 or more authorities provided GuardFraction values in + their votes, the authorities produce a consensus containing a + GuardFraction keyword equal to the low-median of the GuardFraction + votes. + + The GuardFraction keyword is appended in the 'w' line of each router + in the consensus, after the optional 'Unmeasured' keyword. Example: + w Bandwidth=20 Unmeasured=1 GuardFraction=66 + or + w Bandwidth=53600 GuardFraction=99 + 1.4. Raise the bandwidth threshold for being a guard From dir-spec.txt: |