Merge branch 'master' into ff/rrdd

[rrdtool.git] / doc / rrdgraph.pod

diff --git a/doc/rrdgraph.pod b/doc/rrdgraph.pod
index 092e37f..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>]
 
@@ -264,9 +264,20 @@ Note that for linear graphs, SI notation is used by default.
 
 Only generate the graph if the current graph is out of date or not existent.
 Note, that only the image size will be returned, if you run with lazy even
-when using graphv.
+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.