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
Copyright © 2004, Oracle. All rights reserved.
Database Architecture
Control files
Data files
Parameter file
Online redo log files
Password file
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Archive log files
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
Log
writer
LGWR
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
Data file 1
Data file 2
USERS Tablespace
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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
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OS blocks
Oracle Instance Management
SGA
Shared Pool
Streams Pool
Large Pool
Java Pool
Database
Buffer Cache
Redo Log
Buffer
System
Monitor
SMON
Process
Monitor
PMON
Database
Writer
DBW0
Check
point
CKPT
Log
Writer
LGWR
Archiver
ARC0
Copyright © 2004, Oracle. All rights reserved.
Oracle Memory Structures
Server
Process
1
PGA
Server
Process
2
PGA
Background
Process
SGA
Shared Pool
Streams Pool
Large Pool
Java Pool
Database
Buffer Cache
Redo Log
Buffer
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PGA
Oracle Processes
Server
Process
Server
Process
Server
Process
Server
Process
System Global Area
SGA
System
Monitor
SMON
Process Database
Monitor
Writer
PMON
DBWn
Check
point
CKPT
Log
Writer
LGWR
Background Processes
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Archiver
ARCn
Data Dictionary
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Database Control
Database
control
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Grid Control
Grid
control
Management
server
Management
repository
Managed
targets
Agent
Database
control
Agent
Database
OS/third-party
application
Agent
Application
server
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Application
server control
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
Copyright © 2004, Oracle. All rights reserved.
Practice 3:
Creating an Oracle Database
This practice covers creating an Oracle database by
using DBCA.
Copyright © 2004, Oracle. All rights reserved.