From: Klaus Darilion <klaus.darilion@nic.at>
Date: Mon, 20 Aug 2018 15:29:17 +0000 (+0000)
Subject: improve docs about incremental hold-back period on failed XFRs
X-Git-Tag: dnsdist-1.3.3~84^2
X-Git-Url: http://git.ipfire.org/cgi-bin/gitweb.cgi?a=commitdiff_plain;h=7b6e1c687b0ea2f6094284b3c8dcfd396626548c;p=thirdparty%2Fpdns.git

improve docs about incremental hold-back period on failed XFRs
---

diff --git a/docs/modes-of-operation.rst b/docs/modes-of-operation.rst
index 658b2bfd65..bf76cf28e9 100644
--- a/docs/modes-of-operation.rst
+++ b/docs/modes-of-operation.rst
@@ -109,7 +109,12 @@ back on checking the domain for
 :ref:`setting-soa-retry-default` seconds
 between checks. With default settings, this means that PowerDNS will
 back off for 1, then 2, then 3 etc. minutes, to a maximum of 60 minutes
-between checks.
+between checks. The same hold back algorithm is also applied if the zone
+transfer fails due to problems on the master, i.e. if zone transfer is
+not allowed.
+
+Receiving a NOTIFY immediately clears the back off period for the
+respective domain to allow immediately freshness checks for this domain.
 
 .. warning::
   Slave support is OFF by default, turn it on by adding