On Friday 27 August 2010, SEGLARD, Thomas wrote:
But, my mistake, this is only part of answer and I don't exactly write what I wanted to know. What I want is a way to sum the RRDs from different servers and corresponding to the graph definition « ifstat ». The main problem is that the RRDs are not in the same place/directory and thus I have no way to tell rrdtool where to get these RRDs. This is the main problem and why I required some help J
I could do some scrtipt which sync on a regular basis these RRDs into one server directory. It's not very elegant (but I think this will work !). In a future release, maybe it will be possible to use the Metrics reports to do all the maths we want with different RRDs ? ;) Easy, make a subdirectory like graph1 and in that subdirectory add symlinks to the different rrd files. You can give the symlink an other name like graph/vmstat-server1.rrd -> server1/vmstat.rrd
In the graph definition, you can match all vmstat-* files and voila, you can make the sum of what you want:
[vmstat-avm-total] FNPATTERN vmstat-(.+).rrd TITLE Accessed Virtual Memory YAXIS Size kB -b 1024 DEF:avm at RRDIDX@=@RRDFN@:mem_avm:AVERAGE CDEF:sw at RRDIDX@=avm at RRDIDX@,4048,* LINE1:sw at RRDIDX@#@COLOR@:@RRDPARAM@:STACK GPRINT:sw at RRDIDX@:LAST:AVM \: %5.1lf%s (cur) GPRINT:sw at RRDIDX@:MAX: \: %5.1lf%s (max) GPRINT:sw at RRDIDX@:MIN: \: %5.1lf%s (min) GPRINT:sw at RRDIDX@:AVERAGE: \: %5.1lf%s (avg)\n
I do this for adding CPU load on a pSeries with lpars so I can make the sum of all physical CPU usage.
Stef