Can we read control file in Oracle?

Can we read control file in Oracle?

Once the disk drive is repaired, the damaged control file can be restored using the intact copy of the control file from the other disk and the instance can be restarted. The first file listed in the CONTROL_FILES parameter is the only file read by the Oracle database server during database operation.

How do I access my Oracle Database from another computer?

4.4 Connecting to an Oracle Database from a Client Computer

1. (UNIX, Linux, or Windows systems) Open a command window and enter the following command: sqlplus.
2. (Windows systems only) Click Start, select Programs (or All Programs), then Oracle – HOME_NAME, then Application Development, and then SQL*Plus.

How do I use multiplex control files?

Multiplexing Control Files using the init.ora file

1. Shut down the database.
2. Copy the control file to more locations using operating system command.
3. Change the initialization parameter to include new file in the parameter CONTROL_FILES.
4. Start the instance.

What is a Pfile in Oracle?

PFILE stands for the parameter file. It is a text file which can be modified by a text editor. With the help, PFILE Oracle server start an Oracle Instance.

How do you create a control file?

Steps for Creating New Control Files

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.

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 .

How does a control file work in Oracle?

Each control file is associated with only one oracle database. Before a database is opened, the control file in oracle is read to determine if the database is in a valid state to use. Oracle server updates the control file continuously during the database is in use, so it must be available for writing whenever the database is open.

How do I Create Control Files in database?

You specify control file names using the CONTROL_FILES initialization parameter in the database initialization parameter file. The instance recognizes and opens all the listed file during startup, and the instance writes to and maintains all listed control files during database operation.

Can a database administrator edit a control file?

Oracle server updates the control file continuously during the database is in use, so it must be available for writing whenever the database is open. Only the oracle server can modify the information in the control file; no database administrator or end-user can edit the control file.

How to access the Oracle Enterprise Manager database control?

Point your Web browser to the following URL: For example, if you installed the database on a host computer named comp42, and the installer indicated that your Enterprise Manager Console HTTP port number is 5500 (also recorded in the $ORACLE_HOME/install/portlist.ini file), enter the following URL: