Combining statistics

[renfd]

Hi,

I run a server farm with 20 servers. Cpu/memory/network load data is fetched by SNMP. Now I'd like to have a graph that describes total CPU load of the whole farm. Is there a simple way to do this in cacti or do I need to make my own script?

Thanks.

[rr]

• Create a new graph template
  Add all 20 datasources as graph items with graph item type COMMENT
  Add a last graph item, data source none, wanted type, and
  CDEF function "Total All Data Sources"

Beware, that with this method the total is a bit skewed
since each of the 20 data sources is polled at a (slightly) different
point in time.