[rrd-users] Re: removing rra's

[Alex van den Bogaerdt]

Bjorn Nordbo wrote:

> Due to bad planning, I have several RRD's with redundand RRA's:
> 
> RRA:AVERAGE:0.5:1:8064
> RRA:AVERAGE:0.5:6:700
> 
> Ie. 28 days of high resolution (5 min) samples and 14 days om
> lower resolution (30 min) samples. I presume there's no good
> reason to keep the second RRA around(?), and thus I would like
> to remove it.

You can create graphs that plot 30 minutes per pixel. These would
use the second RRA so it's not wasted.  I'd grow the RRA size by
100 rows in order to be able to use them for graphs in a one-hour
resolution as well (800 rows, consolidated to 400 rows of 1 hour
at graph time).

> Is there a good way of doing this (resize to zero doesn't do
> the trick), except dumping the output to XML, modify it and
> restore it to anothe RRD archive?

If you like you can write an application that does the proper
magic.  Every now and then this (kind of) question pops up but
I think the dump and restore exercise is good enough for the
occasional change needed.

cheers,
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