Oracle Database System Structure explanation, oracle System Structure

Oracle Database System Structure explanation, oracle System Structure

1. oracle databaseDatabase Storage StructureAndDatabase instanceIt consists of two parts.

Where,Storage StructureIncludingPhysical storage structureAndLogical Storage StructureIs the basis for data storage and space allocation;InstanceIs the software structure of the oracle database, includingMemory StructureAndBackground process,Is the database operation and

The basis of management.

2. oracle database fromDatabases stored on disks) And manage the database on the disk.Database Management System (DBMS)The two parts correspond to the storage structure and software structure of the database respectively.

The storage structure of oracle Database is divided into two types: physical storage structure and logical storage structure. The data organization and management methods in the operating system and in the database system are described respectively. Where,The physical storage structure is as follows:

A series of files in the operating system,The logical storage structure is the logical organization and management of the physical storage structure..

The software structure of oracle data, that is, oracle instances, including the memory structure and background process structure.

3. describes the relationship between the internal structure, background processes, and storage structure of the oracle database. It can be seen that all user operations are completed through the instance, first in the memory structure, under certain conditions

The background process structure of the database is written to the physical storage organization of the database for permanent storage.