When you create an Oracle Java Cloud Service instance, you can choose the infrastructure that the instance must use: Oracle Cloud Infrastructure or Oracle Cloud Infrastructure Classic. The Oracle WebLogic Server environment that the instance provides in either type of infrastructure is substantially the same. A few differences exist in the supported capabilities and the instance-creation workflows.
Workflow for Creating an Instance in Oracle Cloud Infrastructure
|Task 1: Understand the differences between instances created in Oracle Cloud Infrastructure and in Oracle Cloud Infrastructure Classic. Knowing these differences will help you select an appropriate region while creating your Oracle Java Cloud Service instance.||Differences Between Instances in Oracle Cloud Infrastructure and Oracle Cloud Infrastructure Classic|
|Task 2: Create the required network, object storage, and security resources in the Oracle Cloud Infrastructure region where you intend to create the Oracle Java Cloud Service instance.|
|Task 3: Create an Oracle Cloud database instance in the region where you created the Oracle Cloud Infrastructure resources.
This database is required to store the schema required for Oracle Java Cloud Service.
|Use the appropriate documentation, depending on the Oracle Database service that you want to associate with the Oracle Java Cloud Service instance:
Oracle Database Cloud Service: Create an Oracle Database Cloud Service Database Deployment
Oracle Cloud Infrastructure Database: Managing DB Systems
Oracle Autonomous Transaction Processing: Provision Autonomous Transaction Processing in Using Oracle Autonomous Transaction Processing
|Task 4: Create the Oracle Java Cloud Service instance in the same Oracle Cloud Infrastructure region and virtual cloud network (VCN) as the Oracle Cloud database instance.||Use the appropriate documentation, depending on whether you want to attach the Oracle Java Cloud Service instance to a public subnet or a private subnet:|
Differences Between Instances in Oracle Cloud Infrastructure and Oracle Cloud Infrastructure Classic
|Feature||Oracle Cloud Infrastructure Classic||Oracle Cloud Infrastructure|
|Availability domains||Not applicable||Each region has multiple isolated availability domains, with separate power and cooling. The availability domains within a region are interconnected using a low-latency network. When creating an instance, you can select the availability domain that the instance should be placed in.|
|Compute shapes||Standard and high memory shapes
Note: The shapes available might vary by region.
|VM.Standard and BM.Standard shapes
Note: The shapes available might vary by region.
|Database options for the infrastructure schema||
|Associating an instance with a RAC database for high availability||Use Oracle Database Cloud Service||Use Oracle Cloud Infrastructure Database|
|Networking||You can attach instances to IP networks defined in Oracle Cloud Infrastructure Compute Classic. For such instances, you can choose to not assign public IP addresses.||You must attach each instance to a subnet, in a virtual cloud network created in Oracle Cloud Infrastructure. If you specify a private subnet, the nodes of the instance can't be assigned public IP addresses.|
|Public IP addresses||You can reserve public IP addresses and assign them while creating an instance, or you can have the addresses auto-assigned. With either choice, the public IP addresses won’t change when you restart the nodes or the instance.||You can’t reserve and assign public IP addresses. The addresses are auto-assigned when the service instance is created, but won’t change when you restart the nodes or the instance.|
|Private IP addresses||The private IP addresses are auto-assigned when the service instance is created. The addresses might change when you restart the nodes or the instance. For an instance attached to an IP network, when you restart a node, you can assign a fixed private IP address.||The private IP addresses are auto-assigned when the service instance is created. The addresses will not change when you restart the nodes or the instance.|
|Restrictions when using colocated snapshots||Colocated snapshots (stored in block storage) impose the following restrictions:
||No restrictions for colocated snapshots.|
|Scaling the shape of a node||Supported||Not supported|
|Autoscaling a cluster||Supported||Not supported|
|Adding block storage||You can perform the add-storage operation up to 6 times for a node. In each operation, you can add from 1 to 2048 GB.||You can perform the add-storage operation up to 29 times for a node. In each operation, you can add 50 GB or a multiple of 50.|
|Managing access rules||Use the Oracle Java Cloud Service interfaces to configure access rules.||Configure security rules using the Oracle Cloud Infrastructure interfaces.|
|Using Oracle Identity Cloud Service to control access to applications deployed on the instance||In accounts that use Oracle Identity Cloud Service, while creating an instance, you can enable Oracle Identity Cloud Service as the identity provider for applications deployed on the instance.||Not supported|
|Load balancer options available within Oracle Java Cloud Service||While creating an instance, if you enable Oracle Identity Cloud Service as the identity provider, an Oracle-managed load balancer is created and configured automatically for the instance.
If you don’t enable Oracle Identity Cloud Service, then you can add Oracle Traffic Director as a user-managed load balancer, either while creating the instance or later.
You can’t use Oracle Java Cloud Service to add an Oracle-managed load balancer to an existing service instance. Instead you must manually provision and configure the load balancer in Oracle Cloud Infrastructure Load Balancing Classic.
|You can configure an Oracle-Managed load balancer (Oracle Cloud Infrastructure Load Balancing) or Oracle Traffic Director load balancer, or you can choose not to configure a load balancer. You can also add an Oracle Traffic Director load balancer after you create the service instance, but you cannot add an Oracle-Managed load balancer.|
|Object storage for backups||You can create the object storage container either before or during instance creation.||You must create the object storage bucket in Oracle Cloud Infrastructure before creating the instance.|
|Virtual Image service level||Supported||Not supported|
|Changing the database association for an instance||After creating an instance, you can change the infrastructure database (Oracle Database Cloud Service deployment) that the instance is associated with.||Not supported|