Overview of X8M Scalable Exadata Infrastructure
Oracle Cloud Infrastructure scalable Exadata X8M system model allows you to add additional database and storage servers after provisioning and create a system that matches your capacity needs.
The Exadata Cloud Service Resource Model
Exadata Cloud Service instances are provisioned with an infrastructure model that uses two resources, the cloud Exadata infrastructure resource, and the cloud VM cluster resource.
Existing Exadata DB systems that do not use this infrastructure model can be easily switched to the new resource model with no downtime. For instructions on switching, see To switch an Exadata DB system to the new Exadata resource model.
The Cloud Exadata Infrastructure Resource
The infrastructure resource is the top-level (parent) resource. At the infrastructure level, you control the number of database and storage servers. You also control Exadata system maintenance scheduling at the Exadata infrastructure level. This resource is created using the CreateCloudExadataInfrastructure API.
See To add compute and storage resources to a flexible cloud Exadata infrastructure resource for information on scaling the X8M cloud Exadata infrastructure resource. Note that after adding storage or database servers to the infrastructure resource, you must then add them to the system's VM cluster to utilize the new capacity.
The Cloud VM Cluster Resource
The VM cluster is a child resource of the infrastructure resource, providing a link between your Exadata cloud infrastructure resource and Oracle Database. Networking, OCPU count, IORM, and Oracle Grid Infrastructure are configured and managed at the VM cluster level. This resource is created using the CreateCloudVmCluster API.
See To add database server or storage server capacity to a cloud VM cluster for information on adding available storage or database servers to the VM cluster. Note that you must add servers to the infrastructure resource before you can add capacity to the VM cluster.
Exadata Cloud Service instances currently support creating a single cloud VM cluster.
Additional Exadata Cloud Service Instance Resources
After you have provisioned your Exadata Cloud Service instance, you can provision and use the following types of resources: Oracle Databases, database backups, Data Guard Associations, work requests, Oracle Database Homes, and database server nodes (also called "virtual machines").
The database server file system for database server nodes (also known as "virtual machines") has changed with the X8M generation of hardware. See The X8M Virtual Machine File System Structure for details on the X8M database server node file system.