Best Database Solutions for Elasticity and Minimal DBA Effort

D.

The most economical Oracle Cloud Infrastructure (OCI) database solution for a customer looking to have the elasticity of the cloud with minimal administration and maintenance effort for their DBA tier would be the OCI Autonomous Database (Option C).

The OCI Autonomous Database is a fully-managed, self-driving database service that eliminates the need for customers to perform many manual tasks related to database administration, such as patching, tuning, backup, and recovery. This results in lower maintenance effort and reduced operational costs, as well as improved performance and reliability. The Autonomous Database is designed to be elastic and scalable, so it can easily accommodate changes in workload demand and data volume.

In contrast, the other three options, OCI Bare Metal DB Systems, OCI Virtual Machine DB Systems, and OCI Exadata DB Systems, require more administration and maintenance effort from the customer's DBA team. OCI Bare Metal DB Systems and OCI Virtual Machine DB Systems are Infrastructure as a Service (IaaS) offerings, which means that customers are responsible for the management and maintenance of the underlying infrastructure, including the database software and operating system. OCI Exadata DB Systems are a specialized form of IaaS that provide high-performance, mission-critical databases, but they require significant expertise to manage and maintain.

In summary, the OCI Autonomous Database would be the most economical option for a customer looking to have the elasticity of the cloud with minimal administration and maintenance effort for their DBA tier.