Contents
- 1 How do I enable Archivelog mode?
- 2 Is my Oracle database in Archivelog mode?
- 3 How do you change from Archivelog mode to Noarchivelog mode?
- 4 How do I add RAC database to Archivelog mode?
- 5 What’s the difference between archivelog and noarchivelog?
- 6 Do you need to enable Archive Log mode?
- 7 How does archivelog protect the database from instance failure?
How do I enable Archivelog mode?
Procedure
- Log in as user oracle and enter the following commands: $ export ORACLE_SID=
- To enable ARCHIVELOG mode status, enter the following SQL commands: SQL> Shutdown SQL> Startup mount SQL> Alter database archivelog; SQL> alter database open;
Is my Oracle database in Archivelog mode?
Checking ARCHIVELOG mode status
- Log in as OS user oracle and enter the following commands: $ export ORACLE_SID= where is the name of the database $ sqlplus /nolog SQL> connect / as sysdba.
- To check the ARCHIVELOG mode status, enter the following SQL command: SQL> archive log list;
What is the advantages of operating in Archivelog mode?
Running the database in ARCHIVELOG mode has the following benefits: The database can be recovered from both instance and media failure. Backups can be performed while the database is open and available for use.
How do you change from Archivelog mode to Noarchivelog mode?
Switching Database Archiving Mode
- Shut down the database instance.
- Backup the database.
- Perform any operating system specific steps (optional).
- Start up a new instance and mount, but do not open the database.
- Put the database into archivelog mode.
- Open the database.
- Verify your database is now in archivelog mode.
How do I add RAC database to Archivelog mode?
Follow below steps for enabling archive log mode in oracle RAC.
- stop the database service. srvctl stop database -d DBACLASS.
- start the database in mount state. srvctl start database -d DBACLASS -o mount.
- enable archive log mode.
- Restart the database service (using srvctl)
- set the archive destination to a ASM DISK.
How do I change RAC database to Archivelog mode?
What’s the difference between archivelog and noarchivelog?
ARCHIVELOG mode is a mode that you can put the database in for creating a backup of all transactions that have occurred in the database so that you can recover to any point in time. NOARCHIVELOG mode is basically the absence of ARCHIVELOG mode and has the disadvantage of not being able to recover to any point in time.
Do you need to enable Archive Log mode?
The following operations cannot be performed until archive log mode is enabled. ARCHIVE LOG MODE must be enabled to perform the above operations. There are some situations in the database that must be considered before enabling archivelog mode. These are as follows;
Why is my RMAN database in archivelog mode?
If you want to take the backup of the database using RMAN then your database must be in ARCHIVELOG mode. A database backup, together with online and archived redo log files, guarantees that you can recover all committed transactions in the event of OS or disk faluer.
How does archivelog protect the database from instance failure?
This mode protects the database against instance failure, but not against media failure. In ARCHIVELOG mode, filled groups of redo logs are archived. This mode protects the database from both instance and media failure, but may require additional hardware resources.