fix for #213 restore old behaviour of --lazy. Even in lazy mode all the data

[rrdtool.git] / doc / rrdgraph.pod

diff --git a/doc/rrdgraph.pod b/doc/rrdgraph.pod
index 2c57dbb..72728e7 100644 (file)
--- a/doc/rrdgraph.pod
+++ b/doc/rrdgraph.pod
@@ -93,6 +93,21 @@ one pixel will silently be ignored.
 A horizontal string at the top of the graph and/or a vertically
 placed string at the left hand side of the graph.
 
 A horizontal string at the top of the graph and/or a vertically
 placed string at the left hand side of the graph.
 

+=head2 Right Axis
+
+[B<--right-axis> I<scale>B<:>I<shift>]
+[B<--right-axis-label> I<label>]
+
+A second axis will be drawn to the right of the graph. It is tied to the
+left axis via the scale and shift parameters. You can also define a label
+for the right axis.
+
+[B<--right-axis-format> I<format-string>]
+
+By default the format of the axis lables gets determined automatically. If
+you want todo this your self, use this option with the same %lf arguments
+you know from the PRING and GPRINT commands.
+

 =head2 Size
 
 [B<-w>|B<--width> I<pixels>]
 =head2 Size
 
 [B<-w>|B<--width> I<pixels>]


@@ -155,7 +170,7 @@ and thus the throughput may be higher than the WAN line speed.
 
 In order to avoid anti-aliasing blurring effects rrdtool snaps
 points to device resolution pixels, this results in a crisper
 
 In order to avoid anti-aliasing blurring effects rrdtool snaps
 points to device resolution pixels, this results in a crisper

-aperance. If this is not to your liking, you can use this switch
+appearance. If this is not to your liking, you can use this switch

 to turn this behaviour off.
 
 Gridfitting is turned off for PDF, EPS, SVG output by default.
 to turn this behaviour off.
 
 Gridfitting is turned off for PDF, EPS, SVG output by default.


@@ -210,7 +225,7 @@ placed every I<label factor> lines.  You can specify C<-y none> to
 suppress the grid and labels altogether.  The default for this option is
 to automatically select sensible values.
 
 suppress the grid and labels altogether.  The default for this option is
 to automatically select sensible values.
 

-If you have set --y-grid to 'none' not only the labels get supressed, also
+If you have set --y-grid to 'none' not only the labels get suppressed, also

 the space reserved for the labels is removed. You can still add space
 manually if you use the --units-length command to explicitly reserve space.
 
 the space reserved for the labels is removed. You can still add space
 manually if you use the --units-length command to explicitly reserve space.
 


@@ -258,23 +273,47 @@ Note that for linear graphs, SI notation is used by default.
 
 =back
 
 
 =back
 

+=head2 Legend
+
+[B<-g>|B<--no-legend>]
+
+Suppress generation of the legend; only render the graph.
+
+[B<-F>|B<--force-rules-legend>]
+
+Force the generation of HRULE and VRULE legends even if those HRULE or
+VRULE will not be drawn because out of graph boundaries (mimics
+behaviour of pre 1.0.42 versions).
+
+[B<--legend-position>=(north|south|west|east)]
+
+Place the legend at the given side of the graph. The default is south.
+In west or east position it is necessary to add line breaks manually.
+
+[B<--legend-direction>=(topdown|bottomup)]
+
+Place the legend items in the given vertical order. The default is topdown.
+Using bottomup the legend items appear in the same vertical order as a
+stack of lines or areas.
+

 =head2 Miscellaneous
 
 [B<-z>|B<--lazy>]
 
 Only generate the graph if the current graph is out of date or not existent.
 =head2 Miscellaneous
 
 [B<-z>|B<--lazy>]
 
 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 and even when using PRINT.
-
+Note, that all the calculations will happen regardless so that the output of
+PRINT and graphv will be complete regardless. Note that the behaviour of
+lazy in this regard has seen several changes over time. The only thing you
+can realy rely on before rrdtool 1.3.7 is that lazy will not generate the
+graph when it is already there and up to date, and also that it will output
+the size of the graph. 

 
 [B<--daemon> I<address>]
 
 Address of the L<rrdcached> daemon. If specified, a C<flush> command is sent
 to the server before reading the RRD files. This allows the graph to contain
 
 [B<--daemon> I<address>]
 
 Address of the L<rrdcached> 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.
+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 graph [...] --daemon unix:/var/run/rrdcached.sock [...]
 
 
  rrdtool graph [...] --daemon unix:/var/run/rrdcached.sock [...]
 


@@ -319,11 +358,11 @@ edge of the graph.
 
 Use Times for the title: C<--font TITLE:13:Times>
 
 
 Use Times for the title: C<--font TITLE:13:Times>
 

-If you do not give a font string you can modify just the sice of the default font:
+If you do not give a font string you can modify just the size of the default font:

 C<--font TITLE:13:>.
 
 If you specify the size 0 then you can modify just the font without touching
 C<--font TITLE:13:>.
 
 If you specify the size 0 then you can modify just the font without touching

-the size. This is especially usefull for altering the default font without
+the size. This is especially useful for altering the default font without

 resetting the default fontsizes: C<--font DEFAULT:0:Courier>.
 
 RRDtool comes with a preset default font. You can set the environment
 resetting the default fontsizes: C<--font DEFAULT:0:Courier>.
 
 RRDtool comes with a preset default font. You can set the environment


@@ -409,16 +448,6 @@ Times-Bold, Times-BoldItalic, Times-Italic, Times-Roman, and ZapfDingbats.
 
 If images are interlaced they become visible on browsers more quickly.
 
 
 If images are interlaced they become visible on browsers more quickly.
 

-[B<-g>|B<--no-legend>]
-
-Suppress generation of the legend; only render the graph.
-
-[B<-F>|B<--force-rules-legend>]
-
-Force the generation of HRULE and VRULE legends even if those HRULE or
-VRULE will not be drawn because out of graph boundaries (mimics
-behaviour of pre 1.0.42 versions).
-

 [B<-T>|B<--tabwidth> I<value>]
 
 By default the tab-width is 40 pixels, use this option to change it.
 [B<-T>|B<--tabwidth> I<value>]
 
 By default the tab-width is 40 pixels, use this option to change it.


@@ -431,7 +460,7 @@ measurement, 1 kb/s is 1000 b/s.
 
 [B<-W>|B<--watermark> I<string>]
 
 
 [B<-W>|B<--watermark> I<string>]
 

-Adds the given string as a watermark, horizontally centred, at the bottom 
+Adds the given string as a watermark, horizontally centered, at the bottom 

 of the graph.
 
 =head2 Data and variables
 of the graph.
 
 =head2 Data and variables


@@ -456,7 +485,7 @@ See L<rrdgraph_graph> for the exact format.
 
 Calling rrdtool with the graphv option will return information in the
 rrdtool info format. On the command line this means that all output will be
 
 Calling rrdtool with the graphv option will return information in the
 rrdtool info format. On the command line this means that all output will be

-in key=value format. When used from the perl and ruby bindings a hash
+in key=value format. When used from the Perl and Ruby bindings a hash

 pointer will be returned from the call.
 
 When the filename '-' is given, the contents of the graph itself will also
 pointer will be returned from the call.
 
 When the filename '-' is given, the contents of the graph itself will also


@@ -469,6 +498,8 @@ the output will look like this:
  graph_top = 22
  graph_width = 400
  graph_height = 100
  graph_top = 22
  graph_width = 400
  graph_height = 100

+ graph_start = 1232908800
+ graph_end = 1232914200

  image_width = 481
  image_height = 154
  value_min = 0.0000000000e+00
  image_width = 481
  image_height = 154
  value_min = 0.0000000000e+00


@@ -508,5 +539,6 @@ Make sure to read L<rrdgraph_examples> for tipsE<amp>tricks.
 
 Program by Tobias Oetiker E<lt>tobi@oetiker.chE<gt>
 
 
 Program by Tobias Oetiker E<lt>tobi@oetiker.chE<gt>
 

-This manual page by Alex van den Bogaerdt E<lt>alex@ergens.op.het.netE<gt>
+This manual page by Alex van den Bogaerdt E<lt>alex@vandenbogaerdt.nlE<gt>
+with corrections and/or additions by several people