The Data Access Service (DAS) is Sentinel server's persistence service and provides an interface to the database. It provides data-driven access to the database back-end.
DAS is a container composed of two different processes. Each process is responsible for different types of database operations.
DAS Core: DAS core container, which performs the following functions:
General Sentinel Service operations including login and historical queries.
Provides the server-side functionality for Active Views.
Calculates event data summaries that are used in reports.
Provides the server-side functionality for Sentinel iTRAC.
Provides the server side of the SSL proxy connection to Sentinel server.
DAS Binary: Performs event database insertion.
These processes are controlled by the following configuration files:
das_binary.xml: Used for event and correlated event insertion operations
das_core.xml: All other database operations
DAS receives requests from the different Sentinel processes, converts them to a query against the database, processes the result from the database, and converts it back to a reply. It supports requests to retrieve events for Quick Query and Event Drill Down, in order to retrieve vulnerability information and advisor information and to manipulate configuration information. DAS also handles logging of all events being received from the Collector Manager and requests to retrieve and store configuration information.
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