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authorNick Mathewson <nickm@torproject.org>2018-01-05 16:41:35 -0500
committerNick Mathewson <nickm@torproject.org>2018-01-05 16:41:35 -0500
commit0b6fe3c1230a7d135a6a5541b2abb8f6641cc48e (patch)
tree8e21f6a0f3c9c9105b1673cabd8de95184253c51
parent2d92f4c19a151157b81091d352d59e4f72810542 (diff)
parent3618bd6166002c7aadbb832d8a3e8bdba193f00c (diff)
downloadtor-0b6fe3c1230a7d135a6a5541b2abb8f6641cc48e.tar.gz
tor-0b6fe3c1230a7d135a6a5541b2abb8f6641cc48e.zip
Merge branch 'maint-0.3.2'
-rw-r--r--changes/ticket246816
-rw-r--r--doc/tor.1.txt3
-rw-r--r--src/or/config.c9
3 files changed, 16 insertions, 2 deletions
diff --git a/changes/ticket24681 b/changes/ticket24681
new file mode 100644
index 0000000000..cc0a42b2e0
--- /dev/null
+++ b/changes/ticket24681
@@ -0,0 +1,6 @@
+ o Minor features (fallback directory mirrors):
+ - Make the default DirAuthorityFallbackRate 0.1, so that clients on the
+ public tor network prefer to bootstrap off fallback directory mirrors.
+ This is a follow-up to 24679, which removed weights from the default
+ fallbacks.
+ Implements ticket 24681.
diff --git a/doc/tor.1.txt b/doc/tor.1.txt
index 64114d6e6b..4922383338 100644
--- a/doc/tor.1.txt
+++ b/doc/tor.1.txt
@@ -479,7 +479,8 @@ GENERAL OPTIONS
When configured to use both directory authorities and fallback
directories, the directory authorities also work as fallbacks. They are
chosen with their regular weights, multiplied by this number, which
- should be 1.0 or less. (Default: 1.0)
+ should be 1.0 or less. The default is less than 1, to reduce load on
+ authorities. (Default: 0.1)
[[AlternateDirAuthority]] **AlternateDirAuthority** [__nickname__] [**flags**] __ipv4address__:__port__ __fingerprint__ +
diff --git a/src/or/config.c b/src/or/config.c
index 3ae3af55a3..4b0a59fdf7 100644
--- a/src/or/config.c
+++ b/src/or/config.c
@@ -301,7 +301,14 @@ static config_var_t option_vars_[] = {
VAR("DirReqStatistics", BOOL, DirReqStatistics_option, "1"),
VAR("DirAuthority", LINELIST, DirAuthorities, NULL),
V(DirCache, BOOL, "1"),
- V(DirAuthorityFallbackRate, DOUBLE, "1.0"),
+ /* A DirAuthorityFallbackRate of 0.1 means that 0.5% of clients try an
+ * authority when all fallbacks are up, and 2% try an authority when 25% of
+ * fallbacks are down. (We rebuild the list when 25% of fallbacks are down).
+ *
+ * We want to reduce load on authorities, but keep these two figures within
+ * an order of magnitude, so there isn't too much load shifting to
+ * authorities when fallbacks go down. */
+ V(DirAuthorityFallbackRate, DOUBLE, "0.1"),
V(DisableAllSwap, BOOL, "0"),
V(DisableDebuggerAttachment, BOOL, "1"),
OBSOLETE("DisableIOCP"),