we are running several rac systems license for EE. So we plan to switch from normal rac EE to "RAC ONE NODE"DO you know that "Rac one node" option is not a RAC option. The main purpose of RAC ONE NODE option is opportunity to transfer your application from one node to another one (it means that in this case you will have a RAC configuration but only for 30 min.) for patching the OS or hardware. RAC one node uses OMotion technology that guaranty that all application users migrate to another node in 30 mins time.
"RAC" costs around 25k per cpu and "rac one node" around 10 so the question is if we do use "rac one node" instead of lets say "normal rac" Does we can use our current license or does we need to buy new licenses.RAC and RAC ONE NODE are two DIFFERENT Oracle Database options (like partitioning, advanced security and etc.), so if you use the RAC - you buy RAC, if you use RAC ONE NODE - you buy RAC ONE NODE.