X-Git-Url: https://git.octo.it/?a=blobdiff_plain;f=doc%2Frrdlast.pod;h=f0eaad0c7d86ed761f738f977db35fad89c5576d;hb=9da3f4059b2daf265ebdd1e080f7ddf0d8e86f85;hp=44492369110b8f7f29d9ac892e414157bfeebae0;hpb=d50afc217aaec57e418a55bbe2d20fe996c6e026;p=rrdtool.git
diff --git a/doc/rrdlast.pod b/doc/rrdlast.pod
index 4449236..f0eaad0 100644
--- a/doc/rrdlast.pod
+++ b/doc/rrdlast.pod
@@ -2,16 +2,15 @@
rrdlast - Return the date of the last data sample in an RRD
-=for html
-
=head1 SYNOPSIS
B B I
+S<[B<--daemon> I]>
=head1 DESCRIPTION
-The B function returns the UNIX timestamp when the RRD was last
-updated.
+The B function returns the UNIX timestamp of the most recent
+update of the RRD.
=over 8
@@ -19,11 +18,42 @@ updated.
The name of the B that contains the data.
+=item B<--daemon> I
+
+Address of the L daemon. If specified, a C command is sent
+to the server before reading the RRD files. This allows B to return
+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 manual.
+
+ rrdtool last --daemon unix:/var/run/rrdcached.sock /var/lib/rrd/foo.rrd
+
+=item B<--noflush>
+
+If the L 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
+
+The following environment variables may be used to change the behavior of
+Clast>:
+
+=over 4
+
+=item B
+
+If this environment variable is set it will have the same effect as specifying
+the C<--daemon> option on the command line. If both are present, the command
+line argument takes precedence.
+
=back
=head1 AUTHOR
Russ Wright
-
+Daemon support added by Steve Shipway