Which DB system type offers Instance isolation?

Instance isolation refers to the capability of a database system to ensure that instances do not interfere with one another, providing an environment where each instance operates independently. In the context of Oracle Cloud Infrastructure, Bare Metal DB Systems offer true instance isolation, as they provide dedicated physical servers for each database instance. This means that the hardware resources are not shared with other customers, leading to enhanced performance, security, and reliability.

Bare Metal systems are particularly beneficial for workloads requiring high levels of security and regulatory compliance, as they prevent any potential interference that could arise from sharing resources with other users.

While Exadata systems employ a sophisticated architecture that enhances performance through optimized configurations, they do not inherently focus on instance isolation in the same way that Bare Metal does. Virtual Machine DB Systems operate in a virtualized environment where resources are shared among multiple instances, which means they do not provide the same level of instance isolation as Bare Metal systems.

Therefore, the correct answer highlights the unique characteristics of Bare Metal DB Systems in their ability to deliver dedicated resources, ensuring strong instance isolation.