Gildas Le Nadan wrote:

BEWARE: this patch has been tested on a machine with rrdtool 1.0.x. The values/behavior for rrdtool 1.2.x were taken from the online rrd documentation so they are hopefully correct. If someone was able to test it for me on a server with rrdtool 1.2, I would be very grateful!

I'm a little late on testing this, so hopefully this patch is still the latest version.

I have tested the patch with Hobbit 4.2.0 + all-in-one patch and rrdtool 1.2.15. It seems to work fine, although I am not seeing data presented in the way that I had expected it to look. I want to use the RRD stack to store values taken from the rrd for each host in a given group, then get an average of those stored values which is a single data point that represents the host group as a whole.

I've been experimenting with a version of the la1-multi definition, but I haven't gotten anything to work yet and I'm rather certain that my syntax is off in a few places. I thought I'd email it out anyway, in case I can get some pointers or have someone let me know that it won't work.

TITLE Farm CPU Utilitization YAXIS % Used FNPATTERN vmstat.rrd -u 100 -r DEF:cpu_idl at RRDIDX@=@RRDFN@:cpu_idl:AVERAGE CDEF:hostcpu at RRDIDX@=100,cpu_idl at RRDIDX@,-

need a way to push each hostcpu at RRDIDX@ onto the stack

CDEF:cpuavgs=hostcpu at RRDIDX@,AVERAGE

then get an average of all the values on the stack

using something like COUNT as the num of items in the stack

CDEF:pbusy=cpuavgs1,cpuavgs2,cpuavgs3,COUNT,AVG

graph the final data point

LINE2:pbusy#ccccff:%CPU GPRINT:pbusy:LAST: \: %5.1lf (cur) GPRINT:pbusy:MAX: \: %5.1lf (max) GPRINT:pbusy:MIN: \: %5.1lf (min) GPRINT:pbusy:AVERAGE: \: %5.1lf (avg)\n

-- Tom Georgoulias Systems Engineer McClatchy Interactive