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Which of the following information is stored in Controlfile?
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 timestamp of the database creation.
What is Oracle database architecture?
Oracle Database Architecture. An Oracle database is a collection of data treated as a unit. The purpose of a database is to store and retrieve related information. A database server is the key to solving the problems of information management. The database has logical structures and physical structures.
What is the tablespace in Oracle?
An Oracle database consists of one or more logical storage units called tablespaces, which collectively store all of the database’s data. Each tablespace in an Oracle database consists of one or more files called datafiles, which are physical structures that conform to the operating system in which Oracle is running.
How do you create a Controlfile?
1 Answer
- Shut down the database.
- Copy an existing control file to a new location, using operating system commands.
- Edit the CONTROL_FILES parameter in the database initialization parameter file to add the new control file name, or to change the existing control file name.
- Restart the database.
What is the location of control file in Oracle?
The preconfigured database contains two control files located in the ORACLE_BASE\oradata \DB_NAME directory. Oracle recommends that you keep at least two control files (on separate physical drives) for each database, and set the CONTROL_FILES initialization parameter to list each control file.
What does a control file in Oracle do?
Every Oracle Database has a control file, which is a small binary file that records the physical structure of the database. The control file includes: The control file must be available for writing by the Oracle Database server whenever the database is open. Without the control file, the database cannot be mounted and recovery is difficult.
How many control files should Oracle Database have?
Multiplex Control Files on Different Disks Every Oracle database should have at leasttwo control files, each stored on a different disk. If a control file is damaged due to a disk failure, the associated instance must be shut down.
How to create control files in a database?
You specify control file names using the CONTROL_FILESinitialization parameter in the database’s initialization parameter file (see “Creating Initial Control Files”). The instance startup procedure recognizes and opens all the listed files. The instance writes to and maintains all listed control files during database operation.
What should be included in a control file?
The control file includes: 1 The database name 2 Names and locations of associated data files and redo log files 3 The timestamp of the database creation 4 The current log sequence number 5 Checkpoint information More