WHAT ARE (ORACLE) CLOUD SERVICES?
Instead of buying Oracle software licenses for traditional on-premise use, installed on your own hardware, usually physically in your own building, it is now also possible to use Oracle software via the internet, in an on-demand way, and pay for it via a subscription, much like the electricity network. Using hardware, software and data in this way is called cloud computing, because the network of connected computers form a cloud of computers. You, as the end-user have no direct knowledge where and on how many computers the Oracle software runs. So, when using cloud computing you don't have to buy hardware and you don't have to hire personnel to manage and maintain the hardware and software installation anymore.
To start using (or migrate to) cloud services, you must first determine what kind of cloud services you require and after that how much and for how long you will use them.
CLOUD SERVICES MODELS
Infrastructure-as-a-Services (IaaS): To deploy your applications, you install operating-system images and your application software on the cloud infrastructure. In this model, you will still have to patch and maintain the operating systems and the application software yourself. Cloud providers typically bill IaaS services on a utility computing basis: costs reflect the amount of resources allocated and consumed.
The next level of cloud subscription is called Platform-as-a-Service (PaaS): PaaS offers a ready and running development or application environment to end-users. With PaaS, the cloud provider delivers the entire computing platform, including operating system, application or development environment, database, and web server. Users use and run software on the cloud platform without the costs and complexity of buying and managing the underlying hardware and software.
Software-as-a-Service (SaaS) gives the business the potential to reduce IT operational costs by outsourcing all hardware and software maintenance and support to the cloud provider. This enables the business to reallocate IT operations costs away from hardware/software spending and from personnel expenses, towards meeting other goals. In addition, with applications hosted centrally, updates can be released without the need to install new client software.
BUYING ORACLE CLOUD SERVICESBring Your Own License (BYOL): You use your existing Oracle licenses within the cloud environment if the license permits this use. You will continue to receive software maintenance from Oracle via your existing Oracle support agreement. You can deploy your existing Oracle licenses in cloud environments.
Pay As You Go (PAYG): Subscribe to new Oracle license usage in the cloud, metered and billed on a virtual CPU (OCPU) basis. Oracle PAYG in the cloud includes software maintenance. PAYG is - unlike traditional Oracle licensing - billed on a monthly or hourly basis, and can be payed for with Oracle cloud credits. The number of cloud credits needed depends on the type and use of the Oracle software, and can be ordered here.