To add an RRA is a bit more complex since it requires adding a new item to the RRA header and a new RRA data section, changing the file size and offsets. Rrdtool tune can tune the various HW settings, but not actually add the new RRAs (sorry, I was a bit unclear there)
The easiest way would be to dump the existing RRD to XML, and then modify the XML before loading it back in to a new RRD file; or, create a new RRD file (after getting the existing info via rrdtool info) and then copy the data over item by item, though this would lose any data outsize of the 1cdp=1dp base RRA Steve ________________________________ Steve Shipway ITS Unix Services Design Lead University of Auckland, New Zealand Floor 1, 58 Symonds Street, Auckland Phone: +64 (0)9 3737599 ext 86487 DDI: +64 (0)9 924 6487 Mobile: +64 (0)21 753 189 Email: [email protected]<mailto:[email protected]> P Please consider the environment before printing this e-mail From: Leandro Souza [mailto:[email protected]] Sent: Monday, 14 March 2011 1:17 p.m. To: Steve Shipway Cc: [email protected] Subject: Re: [mrtg] MRTG with RRD and RRA:HWPREDICT Hi Steve, Thanks! Now I can go on. However, the only thing that I have not know is... How to add a new RRA:HWpredict with 'rrdtool tune'? Before to ask this, I read the rrdtune manpage , and I saw only options to change values for DS, RRA existing... Can you show me an example, please? Thanks for help! I'm very appreciated. -- Leandro Toledo de Souza www.leandrotoledo.com.br<http://www.leandrotoledo.com.br> "Se eu tiver uma maçã e você também tiver uma maçã, e trocarmos de maçãs, cada um ficará com uma maçã. Se eu tiver uma ideia e você também tiver uma ideia, e trocarmos ideias, cada um ficará com duas ideias." George Bernard Shaw
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