What process is responsible for reading and writing Metric data in Tableau Server?

The Metrics Service in Tableau Server is specifically designed to handle the reading and writing of Metric data. This service allows Tableau users to create and manage metrics, which are lightweight, summary-level indicators that provide insights into the performance of key business objectives.

By utilizing the Metrics Service, Tableau Server can efficiently operate with the Metric data by managing how it is stored, accessed, and updated. This service is integral to enabling features like alerts and monitoring, which aid users in tracking important trends and making data-driven decisions promptly.

The other options do not perform this specific function. The Data Server focuses more on managing data connections and ensuring data is available for analysis, while the Elastic Server deals primarily with scalability and availability of Tableau services. Data Source Properties relate to settings and configurations on data connections rather than handling the metric data itself. Thus, the Metrics Service is correctly identified as the process responsible for dealing specifically with Metric data on Tableau Server.