[rrd-users] Re: Consolidation many RRDs to 1 RRD
Chan Chi Hung
chihung at mc-3.org
Fri Feb 20 09:21:54 MET 2004
I tried to create a Tcl script w/ tdom extension (www.tdom.org) to parse
all the rrd dumps and consolidate the results. It is slow and not
efficient in this way. The rrd graph with DEF and CDEF is very fast and
efficient in processing and summarising all these info.
It may be the XPath queries that take up most of the computation time
and I do not have time to explore further. What I did now is to that
while I am collecting the data and feeding them into rrd, I do some
calculation and consolidate the result in a new rrd file.
Richard Lithvall wrote:
>>I have 100+ RRD files that I want to graph the consolidated result. I
>>can DEF and CDEF to get what I want but it is getting very lengthy
>>and messy if I have a lot of RRD files. It may even overflow the
>>amount of buffer in the command line argument.
>>Is it possible to 'concatenate' all these RRD files into one single
>>RRD. The RRD files are created and updated at the same time and
>>having the same definition and DSs.
> Hi Chan,
> I'm facing the exact same problem and was thinking of dumping the RRDs
> to XML and, in a perl script, summarize the data and then build a new
> RRD from the resulting XML. But this is messy as well so I'm curious if
> you found out another way to solve this.
CHAN CHI HUNG
Managed Computing Competency Centre
NTU, MPE, Blk N3, #01c-10
50 Nanyang Avenue, Singapore 639798
Tel: +65 6790 4420 (O), +65 9731 7462 (Hp)
Fax: +65 6316 0042
Email: chihung at mc-3.org URL: www.mc-3.org
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