[mrtg] Re: Format of .log file

[Francisco Céspedes]

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. 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.

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 5 numbers 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),"\n"'

    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 second. 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 interval. If the current interval is 1 hour, and updates have occured every 5 minutes, it will be the biggest 5 minute transferrate seen during the hour.

E (5th column)
    The maximum outgoing transfer rate in bytes per second for the current interval.

AUTHOR

Butch Kemper <kemper at bihs.net> and Tobias Oetiker <oetiker at ee.ethz.ch>
----- Original Message ----- 
  From: Ignacio Alvarez-Hamelin 
  To: mrtg at list.ee.ethz.ch 
  Sent: Friday, June 21, 2002 3:37 PM
  Subject: [mrtg] Format of .log file 



  Hello, I am trying to reach th format of log files at the official site of
  MRTG, but I could not. I know that the first column is the u-time, the
  second is the bytes-in, the next is the bytes-out, but the two next
  colomns, what they are?  And, also: Are the bytes-in (bytes-out) the total
  number of bytes into the period of time pre-configured? (normally 300
  seconds)

  Thanks a lot


  José Ignacio ALVAREZ HAMELIN
  ______________________________________________________________

  Laboratoire de Recherche en Informatique, LRI, Bâtiment 490,
  Université Paris Sud (XI), 91405-ORSAY Cedex , France
  Tél:(33)01.69.15.64.51 Fax:01.69.15.65.86
  e-mail: ihameli at lri.fr
  _______________________________________________________________

   _______________________________________________
  |                                               |
  | Laboratorio de Tecnología y |
  | Arquitectura de Sistemas Informáticos |
  | Departamento de Electrónica |
  | Facultad de Ingeniería |
  | Universidad de Buenos Aires |
  | |
  | Paseo Colón 850 |
  | C 1063 ACV  Ciudad de Buenos Aires |
  | República Argentina |
  |_______________________________________________|




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