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. 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 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 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 rest of the File
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
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.
AUTHOR
Butch Kemper <kemper@bihs.net> and Tobias Oetiker
<oetiker@ee.ethz.ch>
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