logfile(1)
NAME
logfile - description of the mrtg-2 logfile format
SYNOPSIS
This document provides a description of the contents of the mrtg-2 logfile.
OVERVIEW
The logfile consists of two main sections.
- 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 incre
assing intervals. - The first number on each line is a unix time stamp. It
represents the number of seconds since 1970.
DETAILS
The first Line
The first line has 3 numbers which are:
- A (1st column)
- 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 (2nd column)
- The "incoming bytes counter" value.
- C (3rd column)
- The "outgoing bytes counter" value.
- The rest of the File
- The second and remaining lines of the file contains 5 num
bers which are: - A (1st column)
- 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),"0' - x is the unix timestamp and y is the offset in seconds
from UTC. (Perl knows y). - B (2nd column)
- The average incoming transfer rate in bytes per sec
ond. This is valid for the time between the A value of
the current line and the A value of the previous line. - C (3rd column)
- The average outgoing transfer rate in bytes per second
since the previous measurement. - D (4th column)
- The maximum incoming transfer rate in bytes per second
for the current interval. This is calculated from all
the updates which have occured in the current inter
val. If the current interval is 1 hour, and updates
have occured every 5 minutes, it will be the biggest 5
minute transfer rate seen during the hour. - E (5th column)
- The maximum outgoing transfer rate in bytes per second
for the current interval.
AUTHOR
- Butch Kemper <kemper@bihs.net> and Tobias Oetiker
<oetiker@ee.ethz.ch>