How do I control multiplexing files?
Multiplexing Control Files using the init.ora file
- Shut down the database.
- Copy the control file to more locations using operating system command.
- Change the initialization parameter to include new file in the parameter CONTROL_FILES.
- Start 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 are the steps to multiplex control file using Pfile and Spfile?
1. SPFILE
- Step1. 1: Validate existing control files.
- Step 1.2: Add new control file to SPFILE.
- Step 1.3: Stop database.
- Step 1.4: Copy the control file to a new location.
- Step 1.5: Start the database in normal mode.
- Step 1.6: Validate control files.
- Step2.
- Step 2.2: Create PFILE using SPFILE.
In which mode is control file generated in Oracle database?
If you omit both the ARCHIVELOG clause and NOARCHIVELOG clause, then Oracle Database chooses noarchivelog mode by default. After creating the control file, you can change between archivelog mode and noarchivelog mode with the ALTER DATABASE statement.
What are CTL files?
what is a . ctl file? The Microsoft Visual Studio 2010 software uses files appended with the . ctl format as developer files. These are stored in the CTL format that was created by Microsoft, and these CTL developer files are also called Visual Basic UserControl Object files.
How do I create a CTL file?
Complete the following steps to create a new control file.
- Make a list of all datafiles and redo log files of the database.
- Shut down the database.
- Back up all datafiles and redo log files of the database.
- Start up a new instance, but do not mount or open the database: STARTUP NOMOUNT.
How do I backup my oracle Controlfile?
Backing Up Control Files Use the ALTER DATABASE BACKUP CONTROLFILE statement to back up your control files. You have two options: Back up the control file to a binary file (duplicate of existing control file) using the following statement: ALTER DATABASE BACKUP CONTROLFILE TO ‘/oracle/backup/control.
What is Pfile and Spfile in Oracle database?
SPFILE is a binary file that contains the same information as the old PFILE. SPFILE permits dynamic changes without requiring you to restart that instance. By default, if you do not specify PFILE in your STARTUP command, Oracle will use server parameter file (SPFILE).
What is CTL file in DFT?
CTL is a software language targeted to SOC DFT, just as COBOL is targeted to business applications and SNOBOL to string manipulation for text editing. CTL can be used to capture all of the data needed to test each IP core in the device hierarchy.
What is control file in RMAN?
Oracle Recovery Manager (RMAN) Control files store the metadata about backups, archived redo logs, and RMAN’s own activities. The SPFILE (also called server parameter file) is an optional, single file which can be located in a selected path or the path auto-designated by Oracle when the file is created.
What is the difference between Pmon and Smon?
PMON and SMON are two required background processes. PMON is the Process Monitor which is responsible for recovering processes when the user process fails. PMON does the process cleanup. SMON is the System Monitor which is responsible for recovering the system after a failure.
What is the difference between redo log and archive log?
Archive logs are archived redo(online) log files. In redo log files are all changes that happened to your data. If your database is in archivelog mode, than redo logs can’t be overwritten, they are archived in some other location when they are full. Redo and archive logs are used in various database recovery scenarios.
How do you Multiplex Control File in Oracle 11g?
How do you multiplex control file in Oracle 11g? Go to the directory where the control file is located ( show parameter control_file; — for file path dir.) Log into SQLPlus and shutdown the database.
What is multiplexing in Oracle?
The term multiplexing is frequently used in Telecom Industries which means mirroring in plain English. It is an act of sending signals to multiple directions at a same time. How is this relevant to Oracle database?
How do I create an additional control file copy for multiplexing?
You can create an additional control file copy for multiplexing by copying an existing control file to a new location and adding the file name to the list of control files. Similarly, you rename an existing control file by copying the file to its new name or location, and changing the file name in the control file list.
How to create multiple copies of the Oracle 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.