=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
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>
(possibly moving it there if the node is already enqueued). The answer will be
sent B<after> the node has been dequeued.
+=item B<FLUSHALL>
+
+Causes the daemon to start flushing ALL pending values to disk. This
+returns immediately, even though the writes may take a long time.
+
=item B<HELP> [I<command>]
Returns a short usage message. If no command is given, or I<command> is
=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.