diff options
| author | Roger Dingledine <arma@torproject.org> | 2014-07-24 00:35:47 -0400 |
|---|---|---|
| committer | Roger Dingledine <arma@torproject.org> | 2014-07-24 16:24:17 -0400 |
| commit | a57c07b21098da4a97d586ffdedca71babe4daaa (patch) | |
| tree | b0a89bb185755ae7644c81874654d37b5ed971f3 | |
| parent | a4c641cce91acb673f81db2b6093fde425039eaf (diff) | |
| download | tor-a57c07b21098da4a97d586ffdedca71babe4daaa.tar.gz tor-a57c07b21098da4a97d586ffdedca71babe4daaa.zip | |
Raise guard threshold to top 25% or 2000 kilounits
Authorities now assign the Guard flag to the fastest 25% of the
network (it used to be the fastest 50%). Also raise the consensus
weight that guarantees the Guard flag from 250 to 2000. For the
current network, this results in about 1100 guards, down from 2500.
This step paves the way for moving the number of entry guards
down to 1 (proposal 236) while still providing reasonable expected
performance for most users.
Implements ticket 12690.
| -rw-r--r-- | changes/ticket12690 | 9 | ||||
| -rw-r--r-- | src/or/config.c | 2 | ||||
| -rw-r--r-- | src/or/dirserv.c | 5 |
3 files changed, 13 insertions, 3 deletions
diff --git a/changes/ticket12690 b/changes/ticket12690 new file mode 100644 index 0000000000..5091883602 --- /dev/null +++ b/changes/ticket12690 @@ -0,0 +1,9 @@ + o Minor features: + - Authorities now assign the Guard flag to the fastest 25% of the + network (it used to be the fastest 50%). Also raise the consensus + weight that guarantees the Guard flag from 250 to 2000. For the + current network, this results in about 1100 guards, down from 2500. + This step paves the way for moving the number of entry guards + down to 1 (proposal 236) while still providing reasonable expected + performance for most users. Implements ticket 12690. + diff --git a/src/or/config.c b/src/or/config.c index 4182411354..2661ce3b73 100644 --- a/src/or/config.c +++ b/src/or/config.c @@ -147,7 +147,7 @@ static config_var_t option_vars_[] = { V(AuthDirInvalid, LINELIST, NULL), V(AuthDirInvalidCCs, CSV, ""), V(AuthDirFastGuarantee, MEMUNIT, "100 KB"), - V(AuthDirGuardBWGuarantee, MEMUNIT, "250 KB"), + V(AuthDirGuardBWGuarantee, MEMUNIT, "2 MB"), V(AuthDirReject, LINELIST, NULL), V(AuthDirRejectCCs, CSV, ""), V(AuthDirRejectUnlisted, BOOL, "0"), diff --git a/src/or/dirserv.c b/src/or/dirserv.c index aedd092522..49fafafab2 100644 --- a/src/or/dirserv.c +++ b/src/or/dirserv.c @@ -1588,7 +1588,7 @@ dirserv_compute_performance_thresholds(routerlist_t *rl, /* (Now bandwidths is sorted.) */ if (fast_bandwidth_kb < ROUTER_REQUIRED_MIN_BANDWIDTH/(2 * 1000)) fast_bandwidth_kb = bandwidths_kb[n_active/4]; - guard_bandwidth_including_exits_kb = bandwidths_kb[(n_active-1)/2]; + guard_bandwidth_including_exits_kb = bandwidths_kb[n_active*3/4]; guard_tk = find_nth_long(tks, n_active, n_active/8); } @@ -1646,7 +1646,8 @@ dirserv_compute_performance_thresholds(routerlist_t *rl, if (n_active_nonexit) { guard_bandwidth_excluding_exits_kb = - median_uint32(bandwidths_excluding_exits_kb, n_active_nonexit); + find_nth_uint32(bandwidths_excluding_exits_kb, + n_active_nonexit, n_active_nonexit*3/4); } log_info(LD_DIRSERV, |