rrdcached(1): Document which commands are aware of the daemon.

diff --git a/doc/rrdcached.pod b/doc/rrdcached.pod
index 8e92571..fd6bc6c 100644 (file)
--- a/doc/rrdcached.pod
+++ b/doc/rrdcached.pod
@@ -74,6 +74,38 @@ used.
 
 =back
 
+=head1 EFFECTED RRDTOOL COMMANDS
+
+The following commands may be made aware of the B<rrdcached> using the command
+line argument B<--daemon> or the environment variable B<RRDCACHED_ADDRESS>:
+
+=over 4
+
+=item B<dump>
+
+=item B<fetch>
+
+=item B<flush>
+
+=item B<graph>
+
+=item B<info>
+
+=item B<last>
+
+=item B<lastupdate>
+
+=item B<update>
+
+=item B<xport>
+
+=back
+
+The B<update> command can send values to the daemon instead of writing them to
+the disk itself. All other commands can send a B<FLUSH> command (see below) to
+the daemon before accessing the files, so they work with up-to-date data even
+if the cache timeout is large.
+
 =head1 HOW IT WORKS
 
 When receiving an update, B<rrdcached> does not write to disk but looks for an