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Creating an Oracle Database

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Objectives

After completing this lesson, you should be able to do the following:

• Describe the Oracle database architecture

• Understand the instance architecture

• Use the management framework

• Use DBCA to– Create a database– Configure a database– Drop a database– Manage templates

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Database Architecture

Data files Online redo log files

Password fileParameter file Archive log files

Control files

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Exploring the Storage Structure

Click on the links to view detailed information

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Control Files

• Contain physical database structure information

• Multiplexed to protect against loss

• Required to start the instance

Control files

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Redo Log Files

• Record changes to the database

• Multiplex to protect against loss

Redo log buffer

LogwriterLGWR

Group 1 Group 2 Group 3

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Tablespaces and Datafiles

• Tablespaces consist of one or more data files

• Data files belong to only one tablespace

USERS Tablespace

Data file 1 Data file 2

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Segments, Extents, and Blocks

• Segments exist within a tablespace.

• Segments are made of a collection of extents.

• Extents are a collection of data blocks.

• Data blocks are mapped to OS blocks.

Segment Extents Data blocks

OS blocks

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Oracle Instance Management

SystemMonitorSMON

DatabaseWriterDBW0

LogWriterLGWR

ProcessMonitorPMON

ArchiverARC0

SGA

Java Pool

Shared Pool Large PoolStreams Pool

DatabaseBuffer Cache

Redo Log Buffer

CheckpointCKPT

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Oracle Memory Structures

Java PoolDatabase

Buffer CacheRedo Log

Buffer

Shared Pool Large Pool

SGA

Streams Pool

ServerProcess

1PGA

ServerProcess

2PGA

Back-groundProcess

PGA

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Oracle Processes

SystemMonitorSMON

DatabaseWriterDBWn

CheckpointCKPT

LogWriterLGWR

ProcessMonitorPMON

ArchiverARCn

ServerProcess

ServerProcess

ServerProcess

ServerProcess

System Global AreaSGA

Background Processes

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Data Dictionary

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Database Control

Database control

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Grid Control

Grid control

Management server

Management repository

Database control

DatabaseOS/third-party

applicationApplication

serverApplication

server control

Managed targets

Agent AgentAgent

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Database Configuration Assistant (DBCA) Overview

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Creating a Database

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Database Identification

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Management Options

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Passwords and Storage

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File Locations and Backup Recovery

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File Location Variables

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Content and Initialization Parameters

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Database Storage

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Creation Options and Create

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Other Actions with DBCA

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Summary

In this lesson, you should have learned how to:

• Describe the Oracle database architecture

• Understand the instance architecture

• Use the management framework

• Use DBCA to– Create a database– Configure a database– Drop a database– Manage templates

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Practice 3: Creating an Oracle Database

This practice covers creating an Oracle database by using DBCA.