X-Git-Url: https://git.octo.it/?p=rrdtool.git;a=blobdiff_plain;f=doc%2Frrdcached.pod;h=8ed29794707bcd4fbaf34320731032fb5dbcbb8e;hp=9254888e8306b2d6dad7a087a78837072516fc90;hb=e1597899f28b7fed13a029c84d9b36bbe5f16505;hpb=ae42e1fb8941cbbdeea7ddbb1af01aefc67b0f31

diff --git a/doc/rrdcached.pod b/doc/rrdcached.pod
index 9254888..8ed2979 100644
--- a/doc/rrdcached.pod
+++ b/doc/rrdcached.pod
@@ -6,7 +6,7 @@ rrdcached - Data caching daemon for rrdtool
 
 =head1 SYNOPSIS
 
-B<rrdcached> [B<-l> I<address>] [B<-w> I<timeout>] [B<-z> I<delay>] [B<-f> I<timeout>] [B<-j> I<dir>]
+B<rrdcached> [B<-l> I<address>] [B<-w> I<timeout>] [B<-z> I<delay>] [B<-f> I<timeout>] [B<-j> I<dir>] [-F]
 
 =head1 DESCRIPTION
 
@@ -87,7 +87,20 @@ found, all updates therein will be read into memory before the daemon
 starts accepting new connections.
 
 The journal will be rotated with the same frequency as the flush timer
-given by B<-f>.  On clean shutdown, the journal files are removed.
+given by B<-f>.
+
+When journaling is enabled, the daemon will use a fast shutdown procedure.
+Rather than flushing all files to disk, it will make sure the journal is
+properly written and exit immediately.  Although the RRD data files are
+not fully up-to-date, no information is lost; all pending updates will be
+replayed from the journal next time the daemon starts up.
+
+To disable fast shutdown, use the B<-F> option.
+
+=item B<-F>
+
+ALWAYS flush all updates to the RRD data files when the daemon is shut
+down, regardless of journal setting.
 
 =item B<-b> I<dir>
 
@@ -415,6 +428,39 @@ Number of times the journal has been rotated since startup.
 
 =back
 
+=head1 SIGNALS
+
+=over 4
+
+=item SIGINT and SIGTERM
+
+The daemon exits normally on receipt of either of these signals.  Pending
+updates are handled in accordance with the B<-j> and B<-F> options.
+
+=item SIGUSR1
+
+The daemon exits AFTER flushing all updates out to disk.  This may take a
+while.
+
+=item SIGUSR2
+
+The daemon exits immediately, without flushing updates out to disk.
+Pending updates will be replayed from the journal when the daemon starts
+up again.  B<WARNING: if journaling (-j) is NOT enabled, any pending
+updates WILL BE LOST>.
+
+=back
+
+=head1 SIGNALS
+
+=over 4
+
+=item SIGINT and SIGTERM
+
+The daemon exits normally on receipt of either of these signals.
+
+=back
+
 =head1 BUGS
 
 No known bugs at the moment.