What is the architecture of Oracle Database?
An Oracle Real Application Clusters (Oracle RAC) database architecture consists of multiple instances that run on separate server machines. All of them share the same database. The cluster of server machines appear as a single server on one end, and end users and applications on the other end.
What is Oracle architecture with diagram?
There are three major structures in Oracle Database server architecture: memory structures, process structures, and storage structures. A basic Oracle database system consists of an Oracle database and a database instance. The database consists of both physical structures and logical structures.
What type of architecture does Oracle DBMS use?
Oracle Database uses a logical storage structure for fine-grained control of disk space usage. The following are logical storage structures in an Oracle Database: Data blocks: a data block corresponds to a number of bytes on the disk. Oracle stores data in data blocks.
What is Oracle Process architecture?
Processes are divided into the following types: A client process runs the application or Oracle tool code. An Oracle process is a unit of execution that runs the Oracle database code. In the multithreaded architecture, an Oracle process can be an operating system process or a thread within an operating system process.
What is the three level architecture of a database?
The ANSI-SPARC database architecture is the basis of most of the modern databases. The three levels present in this architecture are Physical level, Conceptual level and External level.
What are the features of Oracle Database?
3 Features of Oracle Database Gateways
- SQL and PL/SQL Support.
- Heterogeneous Replication.
- Passthrough SQL.
- Result Set Support.
- Data Dictionary Translations.
- Date-Time Data Types.
- Two-Phase Commit Protocol.
- Piecewise LONG Data Type.
What is database architecture in DBMS?
A Database Architecture is a representation of DBMS design. It helps to design, develop, implement, and maintain the database management system. A DBMS architecture allows dividing the database system into individual components that can be independently modified, changed, replaced, and altered.
What are the Oracle Database components?
The following sections explain the physical database structures of an Oracle database, including datafiles, redo log files, and control files.
- Datafiles. Every Oracle database has one or more physical datafiles.
- Control Files.
- Redo Log Files.
- Archive Log Files.
- Parameter Files.
- Alert and Trace Log Files.
- Backup Files.
What are the activities of Pmon?
The process monitor (PMON) performs process recovery when a user process fails. PMON is responsible for cleaning up the database buffer cache and freeing resources that the user process was using.
What is Oracle MMAN process?
MMAN background process manages the dynamic resizing of SGA memory components depending on load for database. Responsible for managing instance memory based on the workloads. Uses the the metrics collected to determine the ideal distribution of memory within oracle.
What are the levels of database architecture?
Three Level Architecture of Database
- Physical Level. This is the lowest level in the three level architecture.
- Conceptual Level. The conceptual level is at a higher level than the physical level.
- External Level. This is the highest level in the three level architecture and closest to the user.
What is Oracle database architecture Part II?
Oracle Database Architecture Part II describes the basic structural architecture of the Oracle database, including physical and logical storage structures. Part II contains the following chapters: Chapter 2, “Data Blocks, Extents, and Segments”
What is application architecture in Oracle?
In the context of this chapter, application architecture refers to the computing environment in which a database application connects to an Oracle database. This section contains the following topics: In the Oracle Database environment, the database application and the database are separated into a client/server architecture .
What is the physical and logical structure of an Oracle Database?
The following section briefly describes the physical and logical storage structure of an Oracle Database. The physical storage structures are simply files that store data. When you execute a CREATE DATABASE statement to create a new database, Oracle creates the following files:
What are the files in an Oracle Database?
Besides these files, an Oracle database includes other important files such as parameter files, network files, backup files, and archived redo log files for backup and recovery. Oracle Database uses a logical storage structure for fine-grained control of disk space usage.