LOGFILE(1) mrtg LOGFILE(1) NNNNAAAAMMMMEEEE logfile - description of the mrtg-2 logfile format SSSSYYYYNNNNOOOOPPPPSSSSIIIISSSS This document provides a description of the contents of the mrtg-2 logfile. OOOOVVVVEEEERRRRVVVVIIIIEEEEWWWW 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. DDDDEEEETTTTAAAAIIIILLLLSSSS TTTThhhheeee ffffiiiirrrrsssstttt LLLLiiiinnnneeee 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. TTTThhhheeee rrrreeeesssstttt ooooffff tttthhhheeee FFFFiiiilllleeee 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"' xxxx is the unix timestamp and yyyy is the offset in seconds from UTC. (Perl knows yyyy). 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 transferrate seen during the hour. E (5th column) The maximum outgoing transfer rate in bytes per second for the current interval. AAAAUUUUTTTTHHHHOOOORRRR Butch Kemper <kemper@bihs.net> and Tobias Oetiker <oetiker@ee.ethz.ch> 2001-06-05 2.9.17 LOGFILE(1)