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| IMAGE CREATION
ipacsum can create png images for every rule which is dis¡
played (so the --filter option can be used to create only
certain pngs). The png contains a much nicer version of
the ascii graph.
PNG image creation depends on the existence of the perl GD
library. If you do not have the GD library installed,
ipacsum won't be able to create images.
If you only have version 1.19 or older of the GD library,
ipacsum will create GIF images instead of PNG images.
Newer GD library versions dumped the GIF support in favor
of PNG due to legal / copyright reasons. All newer
browsers support PNG images, and their use is strongly
encouraged. All options described in this section start
with '--png'; they work the same way if you use the alter¡
native versions which start with '--gif' instead. There is
no functional difference.
--png [DIR]
Enable png image creation. Images are stored into
the directory DIR; if not given, in the current
directory. The images' file names are derived from
the rule name - unacceptable characters for file
names or for http transfers, such as spaces, are
replaced with underscores ("_"). The images dimen¡
sions are 500 * 150. The Y axis is scaled in bytes
per second. The input data is divided into inter¡
vals of exactly one pixel on the X axis.
--png-asis
Instead of creating regular .png files, create
.asis files. .asis files are like .png files, but
with an HTTP header prepended. If you use the
apache HTTP server, you can enable it to directly
send .asis files without generating many HTTP
header lines on its own (see the apache documenta¡
tion, "mod_asis"). The major advantage is that we
can send HTTP "Expires:" header lines with the png
data, forcing browsers to reload the pictures. The
time given in the Expires: header line is the same
as in the HTTP META tag in the index html file (see
--png-index).
--png-average-curve N
Draw an additional curve with average values for
the N dots around the current one. The resulting
curve shows tendencies rather than exact values.
Can be useful for long-term development evaluation.
A good value for N to start with is 15.
--png-caption-in-index
When generating a html index file (see --png-index
below), add statistical data to each png picture in
the index file as text.
--png-height N
Set the image height to N pixels.
--png-index [FILE]
Create a html index file in the image directory,
containing all images created and some more infor¡
mation about creation/start/end times, host name
etc. The name of the file is index.html or, if
given, FILE, and it is placed into the png image
directory unless starting with a "/". The index
file will have some META-Tags in the <HEAD> sec¡
tion. If the end of the time period for which the
data is displayed is the current time, one of them
will be an "Expires" line so www browsers will know
when they should drop the page from their cache.
The time in there is calculated as "now plus the
time one value on the X axis represents".
(To be accurate, the time that appears is now plus
the time given at --interval, given --interval
wasn't smaller than the time one pixel in X direc¡
tion represents in which case it is the time one
pixel in X direction represents.)
--png-no-average
ipacsum draws a dashed horizontal line indicating
the average value in each png picture. Specify this
option to suppress that line.
--png-normalize SEC
This setting changes the scale on the Y axis. The
scale is set to "bytes per SEC seconds". The
default value is 1, resulting in a scale of "bytes
per second". If set to 8, the scale will be "bytes
per 8 seconds" which is in fact the same as "bits
per second" (and the scale label is "bits / sec" in
this special case indeed). Other values are possi¡
ble, for example, for a scale of "bytes per hour",
set this to 3600 (60*60).
If set to 0, the Y scale is what you could call
"absolute". The scale factor is now evaluated from
the --interval (see above) setting which defaults
to one hour (resulting in a display of bytes /
hour). The input data is no longer divided into
intervals of exactly one pixel per interval, but
the pixels are divided into n pixels per (constant)
interval. The resulting X,Y value dots in the
matrix are displayed stronger and are connected
with lines.
Does anybody understand this and has an idea how to
explain better?
--png-filename-prefix PREFIX
Prefix every image file name with PREFIX.
--png-total
Put total byte count value - as displayed in the
text output - into image caption (maximum and aver¡
age values are there anyway).
--png-use-smallfont
Use a smaller font in the image for labels and
scales.
--png-width N
Set the image width to N pixels.
EXAMPLES
To display a summary of accounting data for last month:
% ipacsum --timeframe "last month"
To display a summary of accounting data since midnight
with a graph with one line per hour:
% ipacsum --timeframe today --graph
To display a summary of accounting data for the last ten
days with a graph with one line for each day, and only for
rules containing "isili":
% ipacsum --starttime 10D --graph --interval 1D --filter
isili
To summarize all accounting data of 1997 into one file for
the whole year without displaying anything:
% ipacsum --starttime 1997 --endtime 19971231235959
--replace >/dev/null
or, if we are in 1998:
% ipacsum --timeframe "last year" --replace >/dev/null
To create png graph images of all rules for the last month
in the directory /tmp, including a html file called
"index.html" to display them all at once in a web browser:
% ipacsum --timeframe "last month" --png /tmp --png-index |
).
/u/11917/cheshirecat.png?f=community)
wat was ik??