[hobbit] [feature request] trackmax for all parameters

[Stef Coene]

On Friday 19 January 2007 13:23, Henrik Stoerner wrote:
> So if we're going to add MAX/MIN tracking to the RRD-files, we might as
> well do it at the same time that we change the granularity. The numbers
> I've been thinking of are to keep
>    * 30 days of 5-minute averages
>    * 90 days of 15-minute averages
>    * 360 days on 1-hour averages
>    * 1080 days of 3-hour averages
Even 1080 days is not enough for me.  I have rrd files of backup systems that 
are 6 years old.
I also have scripts that monitors devices every hour.  So specifying 
the --step parameter per rrd can also be handy.

> That alone would cause the size of the RRD files to increase 15 times.
> Adding MIN+MAX tracking would mean tripling the size. An "average"
> host in my setup uses ~400 KB of diskspace for RRD-files, so increasing
> that 15x3 times means it would grow to ~16 MB per host. It's a
> significant increase (I'd have to get more disk space for my production
> systems to handle that), but disks are getting bigger and cheaper -
> and I'd still be storing data for 4000 hosts on less than 60 GB.
I agree.  We are monitoring TB's of oracle databases.  I'm sure they can miss 
100 GB for monitoring purpose.

Btw, the trends patch your wrote is working perfect.  The next step is finding 
a way to create graphs.


Stef