Configuring the Database Archiving Mode potx

⁄ : ‘Archive Log Destinations Status foraclefed21/ORADATAARCHIVE 2/OPTIONAL VALID lename Format: larch_%s.arc nded that archive log files be written to multiple locations spread acros

Configuring the Database Archiving Mode

ORACLE’

Copyright © Oracle Corporation, 2002 All rights reserved.

Objectives

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

° Describe the differences between

ARCHIVELOG and NOARCHIVELOG modes

° Configure multiple archive processes

including remote destinations

ORACLE’

Redo Log History

Changing the Archiving Mode

(1) SHUTDOWN NORMAL/IMMEDIATE/ TRANSACTIONAL

|

|

(3) ALTER DATABASE ARCHIVELOG (5) Full database backup

Setting the Archiving Mode

# Oracle Enterprise Manager Console Administrator: DONNA Management Server:nkochhar-sry_us.oracle.com

ONE Network | Create Ctrl+N

View/Edit Details Alt+Enter ance crash recovery time

121312 Tho time to recover: 10 | Minutes

view Published Reporte: ted mean time to recover: 10 Seconds

Shutdown $ currently in Archive Log mode

OB e021 world - S¥ ⁄ : ‘Archive Log Destination(s) Status

foraclefed21/ORADATAARCHIVE 2/OPTIONAL VALID

lename Format: larch_%s.arc nded that archive log files be written to multiple locations spread across different disks

Automatic and Manual Archiving

IVE | Geo)

Enabling Automatic Archiving

racle Enterprise Manager Console Administrator: DONNA Management Server:nkochhar-sr¥_us_oracle.com

GHA Network

\4 Control instance crash recovery time

J Databases Current estimated mean time to recover: 10 Seconds

_) Groups _JHTTP Servers Listeners JNodes

G>4=] dhep-40p9-40p10-eas

The database is currently in Archive Log mode

_ I# Archive Log Mode l# Automatic archival

&>{=] st-curr.us.oracle.com Hel stc-dbtest.us.oracle.co

$0 Databases

ở ed21 world - SY 3 Archive Log Destination(s) Status

Itis recommended that archive log files be written to multiple locations spread across different disks

S-@B instance a foraclefed21/ORADATAIARCHIVE1/MANDATORY VALID

lr ý foraclefed21/ORADATAIARCHIVE 2/OPTIONAL VALID

Specifying Multiple ARCn Processes

LOG ARCHIVE MAX PROCESSES controls the

number of archive processes started at

instance startup

specified

changed with ALTER SYSTEM

ORACLE’

8-15

Stop or Start Additional Archive Processes

C ance) Archived redo logs

Online redo logs

Enabling Automatic Archiving

at Instance Startup

Archived

Online redo logs oo

LOG ARCHIVE MAX PROCESSES=n

Enabling Automatic Archiving

After Instance Startup

Disabling Automatic Archiving

Manually Archiving Online

6 Redo Log Files

Manually Archiving Online Redo Log Files

ONE Network | Create Ctrl+ll

View/Edit Details Alt+Enter ance crash recovery time

BEE BO time to recover: H 0 | Minutes

View Published Reports

OB e021 world - S¥ ⁄ : ‘Archive Log Destination(s) Status

foraclefed21/ORADATAARCHIVE 2/OPTIONAL VALID

you change the mode to Archive Log mode, you should take a backup immediately In No Archive Log mode, only cold

Schema backups can he taken, and data can be lostin cases of database corruption

Security

1 Storage

Z3 Replication

HTTP Servers _j Listeners

Specifying the Archive Log Destination

° Use LOG ARCHIVE DEST n to specify up to

ten archival destinations

° Use LOG ARCHIVE FORMAT to include the

log sequence number and thread number as

part of the filename

ORACLE’

8-22 Copyright © Oracle Corporation, 2002 All rights reserved.

Specifying Multiple Archive

log archive dest _ 1 = "LOCATION=/archivel"

log archive dest 2 = "SERVICE=standby dbl"

ORACLE

LOG ARCHIVE DEST n Options

° Set archive location as MANDATORY or

OPTIONAL

log archive dest_1="LOCATION=/archive/

Specifying a Minimum Number

of Local Destinations

° LOG ARCHIVE MIN SUCCEED DEST parameter

LOG ARCHIVE MIN SUCCEED DEST = 2

An online redo log group can be reused

Controlling Archiving to a Destination

° An archival destination can be disabled

by using the dynamic initialization

parameter LOG ARCHIVE DEST STATE n

LOG ARCHIVE DEST STATE 2 = DEFER

ALTER SYSTEM SET log archive dest state 3 = DEFER;

LOG ARCHIVE DEST STATE 2 = ENABLE

ALTER SYSTEM SET log archive dest state 3 =

ENABLE ;

ORACLE

8-27 Copyright © Oracle Corporation, 2002 All rights reserved

Specifying the Filename Format

Online redo

log files Group 1 Group 2

Archived log file

Summary

In this lesson, you should have learned how

to:

° Perform manual archiving of logs

° Configure multiple archive processes

ORACLE’

Practice 8 Overview

This practice covers the following topics:

archiving