What are the steps to multiplex control file using Pfile and Spfile?

What are the steps to multiplex control file using Pfile and Spfile?

1. SPFILE

1. Step1. 1: Validate existing control files.
2. Step 1.2: Add new control file to SPFILE.
3. Step 1.3: Stop database.
4. Step 1.4: Copy the control file to a new location.
5. Step 1.5: Start the database in normal mode.
6. Step 1.6: Validate control files.
7. Step2.
8. Step 2.2: Create PFILE using SPFILE.

How do I control multiplexing files?

To multiplex your control files, we copy the control file to multiple locations and change the CONTROL_FILES parameter in the text based initialization file init….Multiplexing Control Files using spfile

1. Alter System set CONTROL_FILES = ‘u02/oradata/ord/control01.ctl’,
2. Shut down the instance.

Why we do control file multiplexing?

As a DBA, it’s your responsibility to multiplex control files to protect your organization in case of possible data loss due to media failure or control file corruption. Creating a copy of controlfile in a new location with a new name .

What is multiplexing in Oracle?

Multiplexing provides better protection for data if an instance or media failure occurs. You can multiplex the online redo log using Oracle Enterprise Manager Database Express (EM Express). To multiplex your online redo log, you must add members to each online redo log group.

How do I redo multiplex log files?

To multiplex your redo log, you must add members to each redo log group. It is not required that redo log groups be symmetrical, but Oracle recommends that your groups all have the same number of members. A database must have a minimum of two redo log groups.

How do I move controls in Oracle 12c?

Moving Oracle control files

1. $ sqlplus “/ as sysdba” SQL> show.
2. SQL> shutdown. immediate;
3. $ mkdir /u03/oradata/TEST. $ mv /u02/oradata/TEST/control*.ctl /u03/oradata/TEST. With the files moved, now update the init or spfile to indicate the new location.
4. $ sqlplus “/ as sysdba” Connected to an idle instance.

How do I create a control file?

Complete the following steps to create a new control file.

1. Make a list of all datafiles and redo log files of the database.
2. Shut down the database.
3. Back up all datafiles and redo log files of the database.
4. Start up a new instance, but do not mount or open the database: STARTUP NOMOUNT.

What is Oracle control file?

Every Oracle database has a control file. A control file is a small binary file that records the physical structure of the database and includes: The database name. Names and locations of associated datafiles and online redo log files. The current log sequence number.

How do you copy a control file?

How to duplicate a controlfile in ASM

1. Identify the location of the current controlfile: SQL> select name from v$controlfile;
2. Shutdown the database and start the instance: SQL> shutdown normal.
3. Use RMAN to duplicate the controlfile:
4. On the ASM instance, identify the name of the controlfile:
5. On the database side:

How do you create a control file?

What is legal and illegal multiplexed redo log configuration?

Legal and Illegal Configurations In most cases, a multiplexed redo log should be symmetrical: all groups of the redo log should have the same number of members. However, the database does not require that a multiplexed redo log be symmetrical.

Is there a way to multiplex a control file?

To multiplex your control files, we copy the control file to multiple locations and change the CONTROL_FILES parameter in the text based initialization file init.ora to include all control files names. 1. 2. Copy the control file to more locations using operating system command.

How to change the parameter of control files?

The major difference is how CONTROL_FILES parameter is changed. 1. Alter System set CONTROL_FILES = ‘u02/oradata/ord/control01.ctl’, 2. Shut down the instance 3. Copy the control file to more locations using operating system command.

Is there a way to multiplex Orace control files?

I understandn that multiple copies of the Orace control files are necessary for safe operation, but I need to understand how to create miltiple copies of the Oracle control files. Answer: There are two ways to multiplex the oracle control files, init.ora and spfile.