logfile - description of the mrtg-2 logfile format
This document provides a description of the contents of
the mrtg-2 logfile.
The logfile consists of two main sections. A very short one
at the beginning:
- The first Line
-
It stores the traffic counters from the most recent run of mrtg
- The rest of the File
-
Stores past traffic rate averates and maxima at increassing
intervals
The first number on each line is a unix time stamp. It represents
the number of seconds since 1970.
The first line has 3 numbers which are:
- A
-
A timestamp of when MRTG last ran for this interface. The timestamp is the
number of non-skip seconds passed since the standard UNIX ``epoch'' of midnight
on 1st of January 1970 GMT.
- B
-
The ``incoming bytes counter'' value.
- C
-
The ``outgoing bytes counter'' value.
The second and remaining lines of the file 5 numbers
which are:
- A
-
The Unix timestamp for the point in time the data on this line is relevant.
Note that the interval between timestamps increases as you prograss through the
file. At first it is 5 minutes and at the end it is one day between two lines.
This timestamp may be converted in EXCEL by using the following formula:
=(x+y)/86400+DATE(1970,1,1)
you can also ask perl to help by typing
perl -e 'print scalar localtime(x),"\n"'
x is the unix timestamp and y is the offset in seconds
from UTC. (Perl knows y).
- B
-
The average incoming transfer rate in bytes per second since the previous
measurement.
- C
-
The average outgoing transfer rate in bytes per second since the previous
measurement.
- D
-
The maximum incoming transfer rate in bytes
per second since the previous measurement.
- E
-
The maximum outgoing transfer rate in bytes per second since the previous
measurement.
Butch Kemper <kemper@bihs.net> and
Tobias Oetiker <oetiker@ee.ethz.ch>