Component information in one spot with some additional tidbits of info (click on images for bigger view).
Data Engine - Stores extracts & queries extracts.
File Store - Shared repository of Tableau extract files.
Backgrounder - Handles TABCMD tasks.
Click on images for larger view.
If you have your Caching in the Data Connections tab set to "Refresh less often" then your cache will be cleared every 12 hours.
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