- documentation for low-rtt and low-rtt-pct.

git-svn-id: file:///svn/unbound/trunk@4614 be551aaa-1e26-0410-a405-d3ace91eadb9

diff --git a/doc/Changelog b/doc/Changelog
index bd142cb0de9d29b9c1d2cff93c9a8c33358be132..294300e8855fa18e81a0e8fa0d4e499e09330cad 100644 (file)
--- a/doc/Changelog
+++ b/doc/Changelog
@@ -1,3 +1,6 @@
+10 April 2018: Wouter
+       - documentation for low-rtt and low-rtt-pct.
+
 9 April 2018: Wouter
        - Fix that flush_zone sets prefetch ttl expired, so that with
          serve-expired enabled it'll start prefetching those entries.

diff --git a/doc/unbound.conf.5.in b/doc/unbound.conf.5.in
index 8b4c6660c785b8527ec657b2865c7a1d2ff9d8db..3eadd528d3aa0c32d49502a8b25739660bc8de76 100644 (file)
--- a/doc/unbound.conf.5.in
+++ b/doc/unbound.conf.5.in
@@ -1309,6 +1309,22 @@ to complete.  Default is 10, allowing 1/10 traffic to flow normally.
 This can make ordinary queries complete (if repeatedly queried for),
 and enter the cache, whilst also mitigating the traffic flow by the
 factor given.
+.TP 5
+.B low\-rtt: \fI<msec time>
+Set the time in millisecond that is considere a low ping time for fast
+server selection with the low\-rtt\-pct option, that turns this on or off.
+The default is 45 msec, a number from IPv6 quick response documents.
+.TP 5
+.B low\-rtt\-pct: \fI<number>
+Specify how many times out of 1000 to pick the fast server from the low
+rtt band.  0 turns the feature off.  A value of 900 would pick the fast
+server when such fast servers are available 90 percent of the time, and
+the remaining time perform normal exploration of random servers.
+When prefetch is enabled (or serve\-expired), such prefetches are not
+sped up, because there is no one waiting for it, and it presents a good
+moment to perform server exploration.  The low\-rtt option can be used
+to specify which servers are picked for fast server selection, servers
+with a ping roundtrip time below that value are considered.
 .SS "Remote Control Options"
 In the
 .B remote\-control: