The Tableau Server Repository is the primary database for storing all server metadata. It is implemented using a PostgreSQL database. This metadata includes crucial information such as user accounts, groups, permissions, project structures, workbook and data source definitions, and metadata about data extracts. The Repository acts as the central catalog for all assets and configurations on the Tableau Server, enabling the system to manage content and enforce security.

A. Data Engine: The Data Engine (Hyper) is responsible for creating and querying Tableau data extracts (.hyper files). It manages the actual data within extracts, not the server's metadata.

C. Backgrounder: The Backgrounder process executes asynchronous, long-running tasks like extract refreshes, subscriptions, and flow runs. It does not store metadata.

D. File Store: The File Store process manages the physical storage of content files, such as data extracts and workbook revisions, but it is not the metadata database itself.

1. Tableau Server Help (Official Vendor Documentation). "Tableau Server Processes." This document provides a comprehensive overview of all server processes.

Repository: "The Repository is the PostgreSQL database that stores server metadata. This includes information about Tableau Server users, groups and group assignments, permissions, projects, data sources, and workbooks and extract metadata."

Data Engine: "The Data Engine creates, stores and queries data extracts."

Backgrounder: "The Backgrounder runs server tasks, such as extract refreshes, subscriptions, flow runs..."

File Store: "When Tableau Server is configured for external file store, this process is no longer used." (In a default configuration, it "manages the storage of extracts and workbook revisions.")

Reference Location: Tableau Server Help > Administrator Guide > Server Processes.

2. Tableau Server Help (Official Vendor Documentation). "Work with the Tableau Server Repository." This section details the function and structure of the Repository.

Section: "About the Tableau Server Repository"

Content: "The Tableau Server repository is a PostgreSQL database that stores data about all user interactions, extract refreshes, and more." This confirms its role as the central metadata store.

Reference Location: Tableau Server Help > Administrator Guide > Server Management > Administrative Views > Work with the Tableau Server Repository.