[mrtg] Re: rrd file size to store 5-min data for 1 yr

[Heath Deschenes]

Well searched the manual and didn't realize that it was a resize.
Also checked the history of the RRD mailing list but nothing was there
either.
Thanks anyway.. I think.
-----Original Message-----
From: Jerry Heidtke [mailto:jheidtke at fmlh.edu] 
Sent: Monday, May 12, 2003 1:33 PM
To: Heath Deschenes; mrtg at list.ee.ethz.ch
Subject: RE: [mrtg] Re: rrd file size to store 5-min data for 1 yr



Well, you could always RTFM (meant in the friendliest possible way).

http://people.ee.ethz.ch/~oetiker/webtools/rrdtool/manual/rrdresize.html

The basic command is 

rrdtool resize filename rra-num GROW|SHRINK rows

To store 5 minute data for one year would require 366 * 24 * 12 = 105408
rows. I believe the "normal" rrd created by mrtg has 800 rows, so you would
want to grow by 104608. This will result in rrd files around 12 MB.

If you just want to create new rrd files of any arbitrary size, instead of
expanding existing ones, mrtg can do this for you automatically. See
http://people.ee.ethz.ch/~oetiker/webtools/mrtg/reference.html#rrdrowcou
nt

How the graph would look depends on what front end you are using to generate
the graphs. Some front ends may allow you to change the number of data
points that are graphed interactively or through a cgi parameter, or you
could always modify the script to generate whatever graphs you want.

Jerry

-----Original Message-----
From: Heath Deschenes [mailto:HDeschenes at oakley.com] 
Sent: Monday, May 12, 2003 2:32 PM
To: mrtg at list.ee.ethz.ch
Subject: [mrtg] Re: rrd file size to store 5-min data for 1 yr


I am interested in setting this up. I have looked around and not found much
information about setting up RRD to store 5-min data for 1yr or 2yr. Can
someone please point me to a location that discuss' the setup for this? Also
what does the graph look like then? I only monitor about 100 interfaces so
the file size will not be a problem for me. 

Thank you for any assistance, 
Heath

-----Original Message-----
From: Alex van den Bogaerdt [mailto:alex at ergens.op.het.net] 
Sent: Friday, May 09, 2003 5:46 AM
To: mrtg at list.ee.ethz.ch
Subject: [mrtg] Re: rrd file size to store 5-min data for 1 yr


On Fri, May 09, 2003 at 01:19:56PM +0200, Simon ter Veen wrote:

[re-ordered the mail in order to get proper quoting]

> > > about 170kb!!! It seems that to store 1 yr 5-min data, the file
> > > size must be 31 MB!!

> > Sounds right; multiply 170kb by (365/2) for approximate values.

> > > Let say, if I have one rrd per router interface, and if I got 1000

> > > interfaces to monitor, I must prepare 31GB for just data
> > > storage?!!!!!

> > Now you know why data consolidation is taking place...

> maybe I am missing something but when a 5-min data log for oe year
> approximately takes up 31MB this is IMHO a mayor disadvantage....with 
> MRTG our 1 yr old log files are at 80KB

See how useful proper quoting is?

1) Removed all irrelevant lines
2) Moved your lines to the place where they belong
3) Easely spotted:  1000 interfaces and 5 minute resolution for an entire
year

http://learn.to/edit_messages

-- 
Much of what looks like rudeness in hacker circles is not intended to give
offence. Rather, it's the product of the direct, cut-through-the-bullshit
communications style that is natural to people who are more concerned about
solving problems than making others feel warm and fuzzy.

http://www.tuxedo.org/~esr/faqs/smart-questions.html

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