A control file contains information about the associated database that is required for access by an instance, both at startup and during normal operation. Control file information can be modified only by Oracle Database; no database administrator or user can edit a control file. Purpose: - store changes made to the database as a result of transaction and internal Oracle activities.
Characteristics: 1. Oracle contains three redo log files. The database will write log entries to a subsequent redo log file when the previous redo log file fills up 3. Oracle keeps track of the Redo Log file by using a redo log sequence number, this number is recorded inside the file as they are used 4.
Structure : Table space Logical space used for storage Segments - Used to organize table space data within a table space Data file physical file used for storage Extent group of contiguous blocks Block unit of physical storage. Open navigation menu. Close suggestions Search Search. User Settings. Skip carousel.
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Jump to Page. Search inside document. Redo Log Files Purpose: - store changes made to the database as a result of transaction and internal Oracle activities. Documents Similar To Oracle Architecture. Sekhar Nooney. Mehul Thakor. Praveen Gupta. Keshav Feugo. This is how you create a database, starting an instance first and creating the database from within the instance. Second, an instance can access only one database at a time. When you start an instance, the next step is to mount that instance to a database.
And an instance can mount only one database at a single point in time. Third, multiple database instances can access the same database. In a clustering environment, many instances on several servers can access a central database to enable high availability and scalability. Finally, a database can exist without an instance. However, it would be unusable because it is just a set of files.
One of the essential tasks of the Oracle Database is to store data. The following section briefly describes the physical and logical storage structure of an Oracle Database. The physical storage structures are simply files that store data.
Besides these files, an Oracle database includes other important files such as parameter files, network files, backup files, and archived redo log files for backup and recovery. Oracle Database uses a logical storage structure for fine-grained control of disk space usage.
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