B<rrdtool graph> I<filename>
[E<lt>B<L<option|rrdgraph/OPTIONS>>E<gt> ...]
-E<lt>B<L<data definition|rrdgraph_data/DEF>>E<gt>[ ...]
+[E<lt>B<L<data definition|rrdgraph_data/DEF>>E<gt> ...]
[E<lt>B<L<data calculation|rrdgraph_data/CDEF>>E<gt> ...]
[E<lt>B<L<variable definition|rrdgraph_data/VDEF>>E<gt> ...]
[E<lt>B<L<graph element|rrdgraph_graph/GRAPH>>E<gt> ...]
If you want to display averages, maxima, percentiles etcetera
it is best to collect them now using the
-B<L<variable definition|rrdgraph_data/VDEF>> statement. At this
-stage, this command works at the unprocessed data from the B<RRD>.
-I<(Note: this is not yet true; it works on consolidated information
-right now)>
+B<L<variable definition|rrdgraph_data/VDEF>> statement.
+Currently this makes no difference but in a future version
+of rrdtool you may want to collect these values before consolidation.
The data fetched from the B<RRA> is then B<consolidated> so that
there is exactly one datapoint per pixel in the graph. If you do
not take care yourself, B<RRDtool> will expand the range slightly
-if necessary (in that case the first pixel may very well become
-unknown!).
+if necessary (in that case the first and/or last pixel may very
+well become unknown!).
Sometimes data is not exactly as you would like to display it. For
instance, you might be collecting B<bytes> per second but want to
B<L<data calculation|rrdgraph_data/CDEF>> command is designed for.
After B<consolidating> the data, a copy is made and this copy is
modified using a rather flexible B<L<RPN|rrdgraph_rpn/>> command
-set. If you use B<L<variable definition|rrdgraph_data/VDEF>>
-statements after this, they work on the consolidated data and may
-return other values for maximum, minimum etcetera!
+set.
When you are done fetching and processing the data, it is time to
graph it (or print it). This ends the B<rrdtool graph> sequence.
=head1 OPTIONS
-It is expected that most options will move to the graph definition
-statements (after all, most of them do define graph elements...).
-
=over 4
=item filename
I<filename> can be 'C<->' to send the image to C<stdout>. In
that case, no other output is generated.
-Z<>
-
=item Time range
-B<[-s|--start E<lt>timeE<gt>]>
-B<[-e|--end E<lt>timeE<gt>]>
-B<[-S|--step E<lt>secondsE<gt>]>
+[B<-s>|B<--start> I<time>]
+[B<-e>|B<--end> I<time>]
+[B<-S>|B<--step> I<seconds>]
The start and end of what you would like to display, and which
B<RRA> the data should come from. Defaults are: 1 day ago until
from the B<RRD>, set B<step> to 3600. Note: a step smaller than
one pixel will silently be ignored.
-Z<>
-
=item Labels
-B<[-t|--title E<lt>stringE<gt>]>
-B<[-v|--vertical-label E<lt>stringE<gt>]>
+[B<-t>|B<--title> I<string>]
+[B<-v>|B<--vertical-label> I<string>]
A horizontal string at the top of the graph and/or a vertically
-placed string at the left hand side of the graph. I<New: (not
-yet implemented)> The string can contain formatter options that
-are used to include variables (from B<VDEF>s) and newlines.
-
-Z<>
+placed string at the left hand side of the graph.
=item Size
-B<[-w|--width E<lt>pixelsE<gt>]>
-B<[-h|--height E<lt>pixelsE<gt>]>
-B<[-j|--only-graph]>
+[B<-w>|B<--width> I<pixels>]
+[B<-h>|B<--height> I<pixels>]
+[B<-j>|B<--only-graph>]
The width and height of the B<canvas> (the part of the graph with
the actual lines and such). Defaults are 400 pixels by 100 pixels.
-If you specify the B<--only-graph> and set the height < 32 pixels you will
-get a tiny graph image to use as an icon in a potential overview. All
-labeling will be stripped off the graph.
-
-Z<>
+If you specify the B<--only-graph> option and set the height E<lt> 32
+pixels you will get a tiny graph image to use as an icon in a potential
+overview. All labeling will be stripped off the graph.
=item Limits
-I<Old behaviour, until the new options are implemented>
-B<[-u|--upper-limit E<lt>valueE<gt>]>
-B<[-l|--lower-limit E<lt>valueE<gt>]>
-B<[-r|--rigid]>
+[B<-u>|B<--upper-limit> I<value>]
+[B<-l>|B<--lower-limit> I<value>]
+[B<-r>|B<--rigid>]
By default the graph will be autoscaling so that it displays the
portion of the y-axis that is actually used. You can change this
still permit those boundaries to be stretched unless the B<rigid>
option is set.
-I<New behaviour, after the new options are implemented>
-B<[--maximum-upper-limit E<lt>valueE<gt>]>
-B<[--minimum-upper-limit E<lt>valueE<gt>]>
-B<[--maximum-lower-limit E<lt>valueE<gt>]>
-B<[--minimum-lower-limit E<lt>valueE<gt>]>
-
-By default the graph will be autoscaling so that it displays the
-portion of the y-axis that is actually used. You can change this
-behaviour by setting the limits. The displayed y-axis will show
-at most B<maximum-upper-limit> and at least B<minimum-upper-limit>
-at the top, and similarly at least B<maximum-lower-limit> and
-at most B<minimum-lower-limit> at the bottom. The default is to
-display at most B<infinity> (so: no limit) and at least
-B<negative infinity> (no minimal value) at the top. The bottom of
-the graph has similar defaults. Note that the minimum lower limit
-is the lowest one so you should compare this with maximum upper
-limit when you try to figure out what you should set.
-
-To make sure the graph shows the range of I<-1000> to I<2000>,
-optionally expanding to no more than I<-3000> to I<4000>,
-set the following options:
-
---maximum-upper-limit 4000 --minimum-upper-limit 2000
---maximum-lower-limit -1000 --minimum-lower-limit -3000
-
-To mimic the old B<rigid> option, you can do:
-
---maximum-upper-limit 4000 --minimum-upper-limit 4000
---maximum-lower-limit -3000 --minimum-lower-limit -3000
-
-B<[-A|--alt-autoscale]>
+[B<-A>|B<--alt-autoscale>]
Sometimes the default algorithm for selecting the y-axis scale is not
performing very well. Normally the scale is selected from a predefined
would display slightly less than C<260-0.001> to slightly more than
C<260+0.001> (Contributed by Sasha Mikheev).
-B<[-M|--alt-autoscale-max]>
+[B<-M>|B<--alt-autoscale-max>]
Where C<--alt-autoscale> will modify both the absolute maximum AND minimum
values, this option will only affect the maximum value. The minimum
be useful when graphing router traffic when the WAN line uses compression,
and thus the throughput may be higher than the WAN line speed.
-B<[-N|--no-gridfit]>
+[B<-N>|B<--no-gridfit>]
To avoid anti-aliasing effects gridlines are placed on
integer pixel values. This is by default done by extending
the scale so gridlines happens to be spaced using an
integer number of pixels, and starts on integer pixel value.
This might extend the scale too much for some logarithmic scales
-and for linear scales where --alt-autoscale is needed.
-Using --no-gridfit disables modification of the scale,
-and just truncates y-coordinates to integer values for bitmap
-formats.
-
-Z<>
+and for linear scales where B<--alt-autoscale> is needed.
+Using B<--no-gridfit> disables modification of the scale.
=item Grid
=item X-Axis
-B<[-x|--x-grid E<lt>I<GTMC<:>GSTC<:>MTMC<:>MSTC<:>LTMC<:>LSTC<:>LPRC<:>LFM>E<gt>]>
+[B<-x>|B<--x-grid> I<GTM>B<:>I<GST>B<:>I<MTM>B<:>I<MST>B<:>I<LTM>B<:>I<LST>B<:>I<LPR>B<:>I<LFM>]
-B<[-x|--x-grid C<none>]>
+[B<-x>|B<--x-grid> B<none>]
The x-axis label is quite complex to configure, if you don't have
very special needs it is probably best to rely on the autoconfiguration
each day. The labels are placed exactly between two major grid lines
as they specify the complete day and not just midnight.
-Z<>
-
=item Y-Axis
-B<[-y|--y-grid I<E<lt>grid stepE<gt>:E<lt>label factorE<gt>>]>
+[B<-y>|B<--y-grid> I<grid step>B<:>I<label factor>]
-B<[-y|--y-grid C<none>]>
+[B<-y>|B<--y-grid> B<none>]
Y-axis grid lines appear at each I<grid step> interval. Labels are
placed every I<label factor> lines. You can specify C<-y none> to
skip the grid and labels altogether. The default for this option is
to automatically select sensible values.
-B<[-Y|--alt-y-grid]>
+[B<-Y>|B<--alt-y-grid>]
Place Y grid dynamically based on graph Y range. Algorithm ensures
that you always have grid, that there are enough but not too many
grid lines and the grid is metric. That is grid lines are placed
every 1, 2, 5 or 10 units. (contributed by Sasha Mikheev)
-B<[-o|--logarithmic]>
+[B<-o>|B<--logarithmic>]
Logarithmic y-axis scaling.
-B<[-X|--units-exponent E<lt>valueE<gt>]>
+[B<-X>|B<--units-exponent> I<value>]
This sets the 10**exponent scaling of the y-axis values. Normally
values will be scaled to the appropriate units (k, M, etc.). However
display the y-axis values in u (Micro, 10e-6, millionths). Use a value
of 0 to prevent any scaling of the y-axis values.
-Z<>
+This option is very effective at confusing the heck out of the default
+rrdtool autoscaler and grid painter. If rrdtool detects that it is not
+successful in labeling the graph under the given circumstances, it will switch
+to the more robust B<--alt-y-grid> mode.
-=back
+[B<-L>|B<--units-length> I<value>]
-Z<>
+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.
+
+=back
=item Miscellaneous
-B<[-z|--lazy]>
+[B<-z>|B<--lazy>]
Only generate the graph, if the current graph is out of date or not
existent.
-B<[-f|--imginfo E<lt>printfstrE<gt>]>
+[B<-f>|B<--imginfo> I<printfstr>]
After the image has been created, the graph function uses printf
together with this format string to create output similar to the PRINT
suitable for including the graph into a web page, the command line
would look like this:
-
--imginfo '<IMG SRC="/img/%s" WIDTH="%lu" HEIGHT="%lu" ALT="Demo">'
+ --imginfo '<IMG SRC="/img/%s" WIDTH="%lu" HEIGHT="%lu" ALT="Demo">'
-B<[-c|--color I<COLORTAG>#I<rrggbb>[I<aa>]]>
+[B<-c>|B<--color> I<COLORTAG>#I<rrggbb>[I<aa>]]
Override the default colors for the standard elements of the graph. The
I<COLORTAG> is one of C<BACK> background, C<CANVAS> for the background of
A green arrow is made by: C<--color ARROW:00FF00>
-B<[--zoom I<factor>]>
+[B<--zoom> I<factor>]
Zoom the graphics by the given amount ... The factor must be E<gt> 0
-B<[-n|--font I<FONTTAG>B<:>I<size>B<:>I<font>]>
+[B<-n>|B<--font> I<FONTTAG>B<:>I<size>B<:>I<font>]
Lets you customize which font to use for the various text elements on the
RRD graphs. C<DEFAULT> sets the default value for all elements C<TITLE>,
RRDtool comes with a preset default font. You can set the environment
variable C<RRD_DEFAULT_FONT> if you want to change this.
-B<[-a|--imgformat C<PNG>|C<SVG>|C<EPS>|C<PDF>]>
+Truetype fonts are only supported for PNG output. See below.
+
+[B<-a>|B<--imgformat> B<PNG>|B<SVG>|B<EPS>|B<PDF>]
-Image format for the generated graph.
+Image format for the generated graph. For the vector formats you can choose among the standard Postscript fonts
+Courier-Bold, Courier-BoldOblique, Courier-Oblique, Courier, Helvetica-Bold,
+Helvetica-BoldOblique, Helvetica-Oblique, Helvetica, Symbol, Times-Bold, Times-BoldItalic,
+Times-Italic, Times-Roman, ZapfDingbats
-B<[-i|--interlaced]>
+[B<-i>|B<--interlaced>]
If images are interlaced they become visible on browsers more quickly.
-B<[-g|--no-legend]>
+[B<-g>|B<--no-legend>]
Suppress generation of legend; only render the graph.
-B<[-F|--force-rules-legend]>
+[B<-F>|B<--force-rules-legend>]
Force the generation of HRULE and VRULE legend 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|--tabwidth E<lt>valueE<gt>]>
+[B<-T>|B<--tabwidth> I<value>]
By default the tab-width is 40 pixels, use this option to change it.
-B<[-b|--base E<lt>valueE<gt>]>
+[B<-b>|B<--base> I<value>]
If you are graphing memory (and NOT network traffic) this switch
should be set to 1024 so that one Kb is 1024 byte. For traffic
measurement, 1 kb/s is 1000 b/s.
-Z<>
-
=item Data and variables
-B<DEF:>I<E<lt>vnameE<gt>>=I<E<lt>rrdfileE<gt>>:I<E<lt>ds-nameE<gt>>:I<E<lt>CFE<gt>>[:step=I<E<lt>stepE<gt>>][:start=I<E<lt>timeE<gt>>][:end=I<E<lt>timeE<gt>>]
+B<DEF:>I<vname>B<=>I<rrdfile>B<:>I<ds-name>B<:>I<CF>[B<:step=>I<step>][B<:start=>I<time>][B<:end=>I<time>]
-B<CDEF:>I<E<lt>vnameE<gt>>=I<E<lt>RPN expressionE<gt>>
+B<CDEF:>I<vname>B<=>I<RPN expression>
-B<VDEF:>I<E<lt>vnameE<gt>>=I<E<lt>RPN expressionE<gt>>
+B<VDEF:>I<vname>B<=>I<RPN expression>
You need at least one B<DEF> statement to generate anything. The
other statements are useful but optional.
See L<rrdgraph_data> and L<rrdgraph_rpn> for exact format.
-Z<>
-
=item Graph and print elements
You need at least one graph element to generate an image and/or
projects / rrdtool.git / blobdiff