I want to know if my linux server have 8 cores and my licence is only for 4 cores,
May i start Natural or Adabas only provisioning/assign 4 cores but have all 8 cores available for system resources.
Will this violate my licence agreement
You need an official decision from Software AG. My understanding is that running the products on a 4-core virtual machine satisfies the license regardless of the processors on the physical server.