[hobbit] FW: RRD data points - need help with graph distortion

[Stef Coene]

On Monday 10 November 2008, Wood, Mike wrote:
> Looks like my graphs didn't come through on the E-mail.  Trying different
> attachment type...
>
>
> From: Wood, Mike [mailto:Mike.Wood at kci1.com]
> Sent: Monday, November 10, 2008 9:06 AM
> To: hobbit at hswn.dk
> Subject: [hobbit] FW: RRD data points - need help with graph distortion
>
> Hi All,
>
> I asked this question last week, but maybe I wasn't clear enough as to what
> I was asking... -
> Management wants to avoid graph distortion on my 60 day CPU Util graph if
> possible.  I think that more datapoints would address the problem. The
> first graph looks good (30 day graph).  The 2nd one distorts what is really
> going on (60 day graph - same server).  Is there any way to make the 2nd
> graph more granular?  Thanks for looking! -
I have a perl script to update all the rrd files:

- it uses rrdtool resize <rrd file> GROW to add extra datapoints so the rrd 
has 5760 data points / rra (per default it has 756 data points)

- it adds also MAX and MIN rra's, this is more tricky because I export the rrd 
to xml, change the xml info and revert back to an rrd file.

Unfortunatly, I can not share this script.  But with
use RRDs ;
use File::Find ();
you can get info about the file and find them ;)


Stef