Re: [hobbit] ganglia-style graph aggregation with hobbit

[Tom Georgoulias <tomg (at) mcclatchyinteractive.com>]

Gildas Le Nadan wrote:

> Hum, I'm afraid I don't get how it works/can't make it work on a simple 
> example: I'm trying to change la-multi in hobbitgraph.cfg so the values 
> will be added up instead of printed on top of the others.
>
> Are the entries in hobbitgraph.cfg used as a template to build the 
> rrdgrph query? If so, then how can I access the values from the previous 
> RDN to add them to the one in the current RDN (@RRDFN@)?
>
> I tried adding the values to a VDEF:add=add,@RRDIDX@,+ but without success.

Did you ever work out a solution for this?

I'm starting to investigate a way that I can take data from many rrd 
files, and graph the average of the data all those rrd files as a single 
line.  For example, I'd like to average the %CPU usage (la1) for 10 
different webservers, and display it as a single overall average %CPU 
for a web farm.

Tom