Merge branch 'master' into ff/rrdd

[rrdtool.git] / doc / rrdgraph.pod

diff --git a/doc/rrdgraph.pod b/doc/rrdgraph.pod
index 89ea6f7..a96ecff 100644 (file)
--- a/doc/rrdgraph.pod
+++ b/doc/rrdgraph.pod
@@ -248,7 +248,7 @@ to the more robust B<--alt-y-grid> mode.
 
 How many digits should rrdtool assume the y-axis labels to be? You
 may have to use this option to make enough space once you start
-fideling with the y-axis labeling.
+fiddling with the y-axis labeling.
 
 [B<--units=si>]
 
@@ -267,6 +267,17 @@ Note, that only the image size will be returned, if you run with lazy even
 when using graphv and even when using PRINT.
 
 
+[B<--daemon> I<address>]
+
+Address of the L<rrdcached(1)> daemon. If specified, a C<flush> command is sent
+to the server before reading the RRD files. This allows the graph to contain
+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.
+
+ rrdtool graph [...] --daemon unix:/var/run/rrdcached.sock [...]
+
 [B<-f>|B<--imginfo> I<printfstr>]
 
 After the image has been created, the graph function uses printf
@@ -441,8 +452,6 @@ at least one print statement to generate a report.
 See L<rrdgraph_graph> for the exact format.
 
 
-=back
-
 =head2 graphv
 
 Calling rrdtool with the graphv option will return information in the
@@ -471,6 +480,21 @@ There is more information returned than in the standard interface.
 Especially the 'graph_*' keys are new. They help applications that want to
 know what is where on the graph.
 
+=head1 ENVIRONMENT VARIABLES
+
+The following environment variables may be used to change the behavior of
+C<rrdtoolE<nbsp>graph>:
+
+=over 4
+
+=item B<RRDCACHED_ADDRESS>
+
+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 SEE ALSO
 
 L<rrdgraph> gives an overview of how B<rrdtool graph> works.