follow the normal code path for exiting rrd_update if there is a problem with rrdc...

[rrdtool.git] / doc / rrdlast.pod

diff --git a/doc/rrdlast.pod b/doc/rrdlast.pod
index ecec65a..f0eaad0 100644 (file)
--- a/doc/rrdlast.pod
+++ b/doc/rrdlast.pod
@@ -22,13 +22,18 @@ The name of the B<RRD> that contains the data.
 
 Address of the L<rrdcached> daemon. If specified, a C<flush> command is sent
 to the server before reading the RRD files. This allows B<rrdtool> to return
-fresh data even if the daemon is configured to cache values for a long time. To
-specify a UNIX domain socket use the prefix C<unix:>, see example below. Other
-addresses are interpreted as normal network addresses, i.E<nbsp>e. IPv4 or IPv6
-addresses in most cases.
+fresh data even if the daemon is configured to cache values for a long time.
+For a list of accepted formats, see the B<-l> option in the L<rrdcached> manual.
 
  rrdtool last --daemon unix:/var/run/rrdcached.sock /var/lib/rrd/foo.rrd
 
+=item B<--noflush> 
+
+If the L<rrdcached> daemon is being used, then omit the flush normally 
+send before returning the last update.  If you add this option, you get the 
+last time the file on disk was updated; if you have relatively low cache times
+and are calling this frequently it will preserve the caching benefit
+
 =back
 
 =head1 ENVIRONMENT VARIABLES
@@ -49,6 +54,6 @@ line argument takes precedence.
 =head1 AUTHOR
 
 Russ Wright <rwwright@home.com>
-
+Daemon support added by Steve Shipway <steve@steveshipway.org>