SQL Server Architecture

Below is the image for the Architecture of SQL Server


Basic storage unit of SQL Sever is called as Page. 1 Page = 8 KB.


Collection of 8 contiguous pages is called as Extent. Pages should be contiguous, they should not be separated.


Collection of Extents is called as Files. It is a physical database file.

File Group:

Collection of files is called as File Groups. It is a Logical Database File.


Collection of file groups is called as Database.

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