Hi,
I have a custom graph definition that takes data (iops) from several RRD files (one file per disk).
Because those disks belong to a RAID array, I'd like to STACK their iops values on a single graph. To get an overview of iops over that RAID array.
I've tried using a single "STACK:rps at RRDIDX@" directive but I got the following error: "STACK must follow LINE or AREA! command:"
So I used "LINE:rps at RRDIDX@#5C7CDA STACK:rps at RRDIDX@#5C7CDA:Read/sec" but this doesn't really stacks every disks value on top of each others.
I there a way to tell the graph definition to "stack on previous @RRDFN@" or some way to do the sum calculation on a set of @RRDFN@ at once (like CDEF:sum=rps at RRDIDX@,sum,+)? Or do I have to write a static graph definition using the X disk I want to sum up ?
TIA, Jo