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authorPhilip Hazel <ph10@hermes.cam.ac.uk>2005-09-19 11:56:11 +0000
committerPhilip Hazel <ph10@hermes.cam.ac.uk>2005-09-19 11:56:11 +0000
commit6af56900ac77d083b8c3abc76bd808e6718412ee (patch)
treec1deef021e181355c5a4ca6689f2c26ce6b7ad06 /doc/doc-txt/NewStuff
parent7a546ad529bc715e345141261097737a986af03c (diff)
Michael Haardt's randomized retry stuff, using the new letter "H".
Diffstat (limited to 'doc/doc-txt/NewStuff')
-rw-r--r--doc/doc-txt/NewStuff12
1 files changed, 11 insertions, 1 deletions
diff --git a/doc/doc-txt/NewStuff b/doc/doc-txt/NewStuff
index cd69ef60e..4640547ae 100644
--- a/doc/doc-txt/NewStuff
+++ b/doc/doc-txt/NewStuff
@@ -1,4 +1,4 @@
-$Cambridge: exim/doc/doc-txt/NewStuff,v 1.71 2005/09/15 12:22:41 fanf2 Exp $
+$Cambridge: exim/doc/doc-txt/NewStuff,v 1.72 2005/09/19 11:56:11 ph10 Exp $
New Features in Exim
--------------------
@@ -155,6 +155,16 @@ TF/01 There's a new script in util/ratelimit.pl which extracts sending
rates from log files, to assist with choosing appropriate settings
when deploying the ratelimit ACL condition.
+PH/13 A new letter, "H", is available in retry parameter sets. It is similar
+ to "G" (geometric increasing time intervals), except that the interval
+ before the next retry is randomized. Each time, the previous interval is
+ multiplied by the factor in order to get a maximum for the next interval.
+ The mininum interval is the first argument of the parameter, and an
+ actual interval is chosen randomly between them. Such a rule has been
+ found to be helpful in cluster configurations when all the members of the
+ cluster restart at once, and may synchronize their queue processing
+ times.
+
Exim version 4.52
-----------------