Which database is primarily used by vCenter Server Appliance?

The vCenter Server Appliance primarily utilizes PostgreSQL as its database. This choice is significant because PostgreSQL is an open-source relational database management system that is well-suited for the demands of vCenter, providing features like high concurrency, robustness, and advanced data integrity. By incorporating PostgreSQL, VMware ensures that vCenter Server can efficiently manage and scale the performance required for handling the range and volume of data that is generated in a typical virtualized environment.

Using PostgreSQL also allows VMware to streamline the deployment of vCenter Server Appliance, as it is included within the appliance itself, reducing complexity and the need for external dependencies on database management systems. This integration simplifies management and monitoring tasks for administrators.

In contrast, other databases listed, such as Oracle, MySQL, and Microsoft SQL Server, are not the standard databases included in vCenter Server Appliance. Although these databases could potentially be used in other VMware products or environments, they are not the default choice for vCenter, emphasizing the tailored nature of PostgreSQL for this particular application.