[rrd-users] Re: Graphing Total Bandwidth

[Andre Miller]

Thanks Serge,

I got something working using the method you suggested:

http://megaton.homeip.net/

The scripts used to create the rrd, populate the data and graph it is on:

http://megaton.homeip.net/rrd/

create.txt : used to create the rrd
getvars.txt : called every 5 minutes to update the data
graph.txt : used to create the graphs

Please note this is still very crude, I just wanted to get it up and running
as fast as possible.

The one graph that I cannot get get right yet is the "Bandwidth Usage This
Month". This doesn't have to be graph, all I need is a number showing the
total number of bytes that have been transferred between two different dates
(start being the beginning of the month, and end being the current time).

The reason for doing all this is that this specific ISP imposes a transfer
limit per month and I would like to track the usage hourly and daily and
have a running counter showing how much has been used this month.

Any suggestions?

-
Andre'

-----Original Message-----
From: Serge Maandag [mailto:serge.maandag at staff.zeelandnet.nl] 
Sent: 30 April 2003 10:55 PM
To: Andre Miller; rrd-users at list.ee.ethz.ch
Subject: RE: [rrd-users] Graphing Total Bandwidth

Well, here's any pointer:

Your database has a couple of RRA's defined. Each RRA is made up of
consolidated data points (CDP's).
The CDP's are built by averaging multiple Primary Data Points (PDP's).

Therefore a PDP spans a certain amount of time.

If the step size is 300 seconds and your second RRA is defined as:
RRA:AVERAGE:0.5:6:288
the the timespan covered by each PDP is 6 x 300 = 1800 seconds or half an
hour.

If you'd make a CDEF bytes=bps,1800,* and graph that, the bars would show
the amount of data that went through each half hour.
Now that's not what your looking for. You are looking for 1 hour wide bars. 

To accomplish that, you could make a database with other RRA's. one that
holds 1 hour values for a day, 24 hour values for a month, etc. You probably
also could do sophisticated stuff with the new version of rrdtool by making
cdef's with the prev and time functions, but I never fiddled with those, so
you are on your own.

Serge.


-----Original Message-----
From: Andre Miller [mailto:andre.miller at blueriver.co.za]
Sent: Wednesday, April 30, 2003 9:53 PM
To: rrd-users at list.ee.ethz.ch
Subject: [rrd-users] Graphing Total Bandwidth


Hi,
 

I've tried to find an answer to this question by searching the archive - but
have not been able to locate a suitable answer, sorry if its been answered
before and I missed it.

 

Currently I am collecting interface data (in octets, out octets) every 5
minutes and are graphing it showing average throughput (in bytes/second).

 

I want an additional graph showing bandwidth usage, in bytes, doesn't really
matter. I have not been able to get this right.

 

To explain a bit better, what I want is three different graphs:

 

Daily: X axis: one point/bar per hour, Y axis: Total amount of bytes
transferred in that hour.

Monthly: X axis, one point/bar per day, Y axis: Total amount of bytes
transferred in that day.

Yearly: X axis, one point/bar per month, Y axis, Total amount of bytes
transferred in that month.

 

So for example, on the daily graph, if between 13:00 and 14:00, 5 megabytes
was transferred, the bar will show 5mb for that point.

 

Any help / pointers would be appreciated. I've heard that anything is
possible with rrdtool - so I must be able to do this =).

 

-

Andre' Miller

 


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