Physical Access of the Database System

Strategy Selector: software that translates a user request into an effective form for execution.

Buffer Manager: software that controls the movement of data between main memory and disk storage.

File Manager: software that manages the allocation of storage locations and data structures.

Data Dictionary: this part of the DBMS defines the structure of user data and how they are to be used.

Main Memory: storage located in the central processing unit , used for data made and how they are to be used.

Disk Drive : Physical unit that contains the disk storage unit.

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