[rrd-developers] Re: bug in rrdtool restore function

Ian Holsman lists at holsman.net
Mon May 29 09:03:36 MEST 2006

On 29/05/2006, at 4:06 PM, Tobias Oetiker wrote:

> Hi Ian,
> my hunch is that fixing this one problem would only be the
> beginning of a long stretch of issues ...

I don't think so.. other than that the output python's xml dom writes  
is fine.

> is there a particular reason you have for wanting to fix this
> issues ?

yes.. I have ~10,000 RRD's with a bad RRA definition which is saving  
stuff for only 3 months. (instead of 2 years)
I am shoving the data from a backup RRD into the current one and  
recreating it.
the only way I know how to do this is via the XML output of both...
it seems to work ok, but it is slow.
my solution to this issue is just to skip the first 22 bytes of the  
XML that python generates.


> cheers
> tobi
>> as a followup to my how to merge 2 rrd's post later I started going
>> to XML manipulation route.
>> I noticed that RRD doesn't like to restore a document that starts
>> with the following
>> <?xml version="1.0" ?>
>> which is valid xml.
>> I'm thinking the 'eat_tag' function needs to be adjusted to cater for
>> this.
>> any thoughts?
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> -- 
> ETH Zurich
> Tobias Oetiker, IT Support Group D-ITET (ISG.EE)
> ETL F24.2, Physikstrasse 3, 8092 Zurich, Switzerland
> Phone +41 44 63 25286,  http://people.ee.ethz.ch/oetiker/

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