Oracle cloud is a cloud services environment that enable to build and run wide range of applications and services. Before study the core of oracle cloud infrastructure (OCI), it needs to discuss about the key terminology of OCI.
Region and Availability domain: A region is a localized geographical area and availability domain is one or more data centers in a region. A region includes one or more availability domains and availability domains are isolated with each one to avoid the failure effects of an availability domain to another.
Console: Console is the web user interface to manage all activities of OCI and access the OCI.
Tenancy: When you create your OCI account for your company, Oracle will create a tenancy. It is an isolated partition in OCI and you can administrate and organize your cloud works in the tenancy.
Compartments: Compartments give the facility to control the access of cloud resources. It is a collection of resources of cloud like instances, block volumes etc. Permission will be given by the administrator to groups to access the compartments. Compartments is a logical group and it filters the view for users.
Virtual Cloud Network (VCN): It is the usual network with gateways, subnets and other components of networking. You need to create at least one VCN before launch an instance.
Instances: An instance is a compute host running on OCI. You can utilize the machine by enhancing performance.
Image: An image is a blue print of a virtual hard drive that contain the operating system and other software services. When you needed to launch an instance you can define the characteristics by selecting the image.
Shape: In OCI, the shape specifies the number of CPU and amount of memory allocated for an instance.
Key pair: Key pair is an authentication mechanism in the OCI. It contains private key file and public key file and you need to upload the public key to OCI and keep the private key in your computer more secured way. The private key is like password for logging authentication.
Block volume: A block volume is a virtual disk and provides block storage space for OCI. It is like a physical hard drive for your computer. Simply you can attach a block volume for an instance by detaching from another without any data lost.
Object storage: It is another data storage mechanism in OCI and it store and manage data as objects. If you needed to store very large amount of data that does not change very frequently,better to store as object storage. Normally object storage includes data backups, file sharing and logs.
Bucket: A bucket can contain infinite number of objects and it is a large container.
Originally copied from my blog. click here