rrdgraph_graph (1) Linux Manual Page
NAME
rrdgraph_graph – rrdtool graph command reference
SYNOPSIS
PRINT:vname:format
GPRINT:vname:format
COMMENT:text
VRULE:time#color[:legend][:dashes[=on_s[,off_s[,on_s,off_s]…]][:dash-offset=offset]]
HRULE:value#color[:legend][:dashes[=on_s[,off_s[,on_s,off_s]…]][:dash-offset=offset]]
LINE[width]:value[#color][:[legend][:STACK][:skipscale][:dashes[=on_s[,off_s[,on_s,off_s]…]][:dash-offset=offset]]
AREA:value[#color][:[legend][:STACK][:skipscale]]
TICK:vname#rrggbb[aa][:fraction[:legend]]
SHIFT:vname:offset
TEXTALIGN:{left|right|justified|center}
PRINT:vname:CF:format (deprecated)
GPRINT:vname:CF:format (deprecated)
STACK:vname#color[:legend] (deprecated)
DESCRIPTION
These instructions allow you to generate your image or report. If you don’t use any graph elements, no graph is generated. Similarly, no report is generated if you don’t use print options.
PRINT:vname:format[:strftime]
Depending on the context, either the value component or the time component of a VDEF is printed using format. It is an error to specify a vname generated by a DEF or CDEF.
Any text in format is printed literally with one exception: The percent character introduces a formatter string. This string can be:
For printing values:
%%- just prints a literal ‘%’ character
%#.#le- prints numbers like 1.2346e+04. The optional integers # denote field width and decimal precision.
%#.#lf- prints numbers like 12345.6789, with optional field width and precision.
%s- place this after %le, %lf or %lg. This will be replaced by the appropriate SI magnitude unit and the value will be scaled accordingly (123456 -> 123.456 k).
%S- is similar to %s. It does, however, use a previously defined magnitude unit. If there is no such unit yet, it tries to define one (just like %s) unless the value is zero, in which case the magnitude unit stays undefined. Thus, formatter strings using %S and no %s will all use the same magnitude unit except for zero values.
If you PRINT a VDEF value, you can also print the time associated with it by appending the string :strftime to the format. Note that RRDtool uses the strftime function of your OSs C library. This means that the conversion specifier may vary. Check the manual page if you are uncertain. The following is a list of conversion specifiers usually supported across the board.
%a- The abbreviated weekday name according to the current locale.
%A- The full weekday name according to the current locale.
%b- The abbreviated month name according to the current locale.
%B- The full month name according to the current locale.
%c- The preferred date and time representation for the current locale.
%d- The day of the month as a decimal number (range 01 to 31).
%H- The hour as a decimal number using a 24-hour clock (range 00 to 23).
%I- The hour as a decimal number using a 12-hour clock (range 01 to 12).
%j- The day of the year as a decimal number (range 001 to 366).
%m- The month as a decimal number (range 01 to 12).
%M- The minute as a decimal number (range 00 to 59).
%p- Either `AM‘ or `PM‘ according to the given time value, or the corresponding strings for the current locale. Noon is treated as `pm’ and midnight as `am’. Note that in many locales and `pm’ notation is unsupported and in such cases %p will return an empty string.
%s- The second as a decimal number (range 00 to 61).
%S- The seconds since the epoch (1.1.1970) (libc dependent non standard!)
%U- The week number of the current year as a decimal number, range 00 to 53, starting with the first Sunday as the first day of week 01. See also %V and %W.
%V- The ISO 8601:1988 week number of the current year as a decimal number, range 01 to 53, where week 1 is the first week that has at least 4 days in the current year, and with Monday as the first day of the week. See also %U and %W.
%w- The day of the week as a decimal, range 0 to 6, Sunday being 0. See also %u.
%W- The week number of the current year as a decimal number, range 00 to 53, starting with the first Monday as the first day of week 01.
%x- The preferred date representation for the current locale without the time.
%X- The preferred time representation for the current locale without the date.
%y- The year as a decimal number without a century (range 00 to 99).
%Y- The year as a decimal number including the century.
%Z- The time zone or name or abbreviation.
%%- A literal `%’ character.
PRINT:vname:CF:format
Deprecated. Use the new form of this command in new scripts. The first form of this command is to be used with CDEF vnames.
GRAPH
GPRINT:vname:format
This is the same as "PRINT", but printed inside the graph.
GPRINT:vname:CF:format
Deprecated. Use the new form of this command in new scripts. This is the same as "PRINT", but printed inside the graph.
COMMENT:text
Text is printed literally in the legend section of the graph. Note that in RRDtool 1.2 you have to escape colons in COMMENT text in the same way you have to escape them in *PRINT commands by writing ‘\:’.
VRULE:time#color[:legend][:dashes[=on_s[,off_s[,on_s,off_s]…]][:dash-offset=offset]]
Draw a vertical line at time. Its color is composed from three hexadecimal numbers specifying the rgb color components (00 is off, FF is maximum) red, green and blue followed by an optional alpha. Optionally, a legend box and string is printed in the legend section. time may be a number or a variable from a VDEF. It is an error to use vnames from DEF or CDEF here. Dashed lines can be drawn using the dashes modifier. See LINE for more details.
HRULE:value#color[:legend][:dashes[=on_s[,off_s[,on_s,off_s]…]][:dash-offset=offset]]
Draw a horizontal line at value. HRULE acts much like LINE except that will have no effect on the scale of the graph. If a HRULE is outside the graphing area it will just not be visible.
LINE[width]:value[#color][:[legend][:STACK][:skipscale]][:dashes[=on_s[,off_s[,on_s,off_s]…]][:dash-offset=offset]]
Draw a line of the specified width onto the graph. width can be a floating point number. If the color is not specified, the drawing is done ‘invisibly’. This is useful when stacking something else on top of this line. Also optional is the legend box and string which will be printed in the legend section if specified. The value can be generated by DEF, VDEF, and CDEF. If the optional STACK modifier is used, this line is stacked on top of the previous element which can be a LINE or an AREA.
Normally the graphing function makes sure that the entire LINE or AREA is visible in the chart. The scaling of the chart will be modified accordingly if necessary. Any LINE or AREA can be excluded from this process by adding the option skipscale.
The dashes modifier enables dashed line style. Without any further options a symmetric dashed line with a segment length of 5 pixels will be drawn. The dash pattern can be changed if the dashes= parameter is followed by either one value or an even number (1, 2, 4, 6, …) of positive values. Each value provides the length of alternate on_s and off_s portions of the stroke. The dash-offset parameter specifies an offset into the pattern at which the stroke begins.
When you do not specify a color, you cannot specify a legend. Should you want to use STACK, use the “LINEx:<value>::STACK” form.
AREA:value[#color][:[legend][:STACK][:skipscale]]
See LINE, however the area between the x-axis and the line will be filled.
TICK:vname#rrggbb[aa][:fraction[:legend]]
Plot a tick mark (a vertical line) for each value of vname that is non-zero and not *UNKNOWN*. The fraction argument specifies the length of the tick mark as a fraction of the y-axis; the default value is 0.1 (10% of the axis). Note that the color specification is not optional. The TICK marks normally start at the lower edge of the graphing area. If the fraction is negative they start at the upper border of the graphing area.
SHIFT:vname:offset
Using this command RRDtool will graph the following elements with the specified offset. For instance, you can specify an offset of (
TEXTALIGN:{left|right|justified|center}
Labels are placed below the graph. When they overflow to the left, they wrap to the next line. By default, lines are justified left and right. The TEXTALIGN function lets you change this default. This is a command and not an option, so that you can change the default several times in your argument list.
STACK:vname#color[:legend]
Deprecated. Use the STACK modifiers on the other commands instead!
Some notes on stacking
When stacking, an element is not placed above the X-axis but rather on top of the previous element. There must be something to stack upon.
You can use an invisible LINE or AREA to stacked upon.
An unknown value makes the entire stack unknown from that moment on. You don’t know where to begin (the unknown value) and therefore do not know where to end.
If you want to make sure you will be displaying a certain variable, make sure never to stack upon the unknown value. Use a CDEF instruction with IF and UN to do so.
NOTES on legend arguments
Escaping the colon
A colon ‘:’ in a legend argument will mark the end of the legend. To enter a ‘:’ as part of a legend, the colon must be escaped with a backslash ‘\:’. Beware that many environments process backslashes themselves, so it may be necessary to write two backslashes in order to one being passed onto rrd_graph.
String Formatting
The text printed below the actual graph can be formatted by appending special escape characters at the end of a text. When ever such a character occurs, all pending text is pushed onto the graph according to the character specified.
Valid markers are: \j for justified, \l for left aligned,