If a current customer has an Enterprise License Agreement (ELA), are they entitled to use Oracle RAC One Node?
Yes, assuming the existing ELA/ULA includes Oracle RAC. The license guide states that all Oracle RAC option licenses (not SE RAC) include all the features of Oracle RAC One Node. Customers with existing RAC licenses or Oracle RAC ELA’s can use those licenses as Oracle RAC One Node. This amounts to “burning” a Oracle RAC license for Oracle RAC One Node, which is expensive long term. Obviously if the ELA/ULA does not include Oracle RAC, then they are not entitled to use Oracle RAC One Node.