[mrtg] Re: Log File Conversion

[Chu, Quang]

So, if I want to set the ThreshMinI or ThreshMinO at 100 kb/s do I have to
convert this into the byte counter as shown from the MRTG log file?  If that
is the case, do I multiply 100 kb/s by 600 sec??

100 kb/s * 600 s 

Thanks 

-----Original Message-----
From: Fruitman, Corey [mailto:Corey.Fruitman at allstream.com] 
Sent: Monday, December 01, 2003 1:49 PM
To: Chu, Quang; mrtg at list.ee.ethz.ch
Subject: RE: [mrtg] Log File Conversion

The first line of the log file shows the raw counters from the last poll.
They can't be converted into the "current" measurement because the "current"
measurement is a *rate*, not a fixed number.

When MRTG gets the next poll, it replaces the first line with the raw values
it gets from the device and calculates the *rate* on the next line.

Suppose you got the following measurements...

		|--------- raw --------|
Time		Counter In	Counter Out
10:00am	100		250
10:05am	110		260
10:10am	115		280

At 10:00 the first line would show "100" and "250" -- the raw counters from
the last poll.

But at 10:10am, the first line of the log file would now show 115 and 280
since they were the last counters retrieved from the device.  The "current"
measurement in on your graph would be (115-110)/300 [where 300 -- or five
minutes -- is the number of seconds between polls] and your "current"
measurement out would be (280-260)/300.  

Hope that helps,
Corey.

-----Original Message-----
From: mrtg-bounce at list.ee.ethz.ch [mailto:mrtg-bounce at list.ee.ethz.ch]On
Behalf Of Chu, Quang
Sent: December 1, 2003 4:15 PM
To: 'mrtg at list.ee.ethz.ch'
Subject: [mrtg] Log File Conversion


Can someone please help me with the explanation for the log file generated
by mrtg?  I understand that the first list the unix time stamp, current 'in'
counter in bytes, current 'out' counter in bytes.  When this is graph, it is
converts to kb/s if needed to right?  I am having a little trouble trying to
do the math for the following:
>From Log file:

1070050157	834213218	86673815  

>From Graph

11:59		1254.8 kb/s	64.1 kb/s

Can someone please show me how does the conversion works?  I need to
understand so that I can determine how to set the minimum bandwidth
threshold.  Thank you in advance.



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