[mrtg] Re: MRTG History...or Interactive MRTG revisited

PAUL WILLIAMSON pwilliamson at mandtbank.com
Thu Mar 4 19:27:19 MET 2004

>>>> "Cook, Garry" <GWCOOK at mactec.com> 03/04/04 12:59PM >>>
>> Hi
>> I was just going through the history of this list and found a post
>> regarding an "Interactive MRTG"...I'm not sure if this was ever
>> developed or not...but what it sounds like, and what I'm looking for,
>> is some way to display all of the older log data in the "Day" view. 
>> I mean...maybe I could type in a date and have MRTG pull the logs for
>> that date and then display the data in the "Day" graph...instead of
>> the week, month, year...I guess just for the added detail.  Thanks
>> for any info on this... 
>> Jason D. Humes
>If you are storing your data in .rrd files, this is not possible. This
>is due to the way RRDTool averages the data points over time. The graphs
>are generated on the fly from the .rrd files, and the data points that
>make up the graphs that you see today are not going to be around a week
>from now.
>However, the routers2.cgi front-end has been developed with some 'graph
>archiving' code that enables you to archive specific graphs. So, if you
>look into this further, it may allow you to archive your daily graphs
>and be able to refer back to them at a future date. While I use
>routers2.cgi (http://www.steveshipway.org/), I have not tested nor used
>the archive feature, so I can't offer you much more detail.
>Garry W. Cook, CCNA

Sure, you can certainly do this.  You just need to adjust the 5 minute 
RRA when you create the RRD.  There is a section in cfgmaker that 
defines what RRA's are created within an RRD, and you just need to 
increase this.  We are using regular MRTG to poll the values, 
14all to display, and a custom program to select a specific 24 hour 
period to show 5 minute values for any day since we started the collection 
for up to a year (in some cases up to 4 years) back.


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