What are the oracle file types?

Oracle file types include: Data File (DBF): Stores data and indexes. Redo log files (RDO): Records database changes to ensure integrity. Control file (CTL): Stores database structure and file information. Parameter file (PFL): Stores startup instance configuration. Server Parameter File (SPF): Stores start/stop server instance configuration. Trace File (TRC): Records activities and events for diagnostic purposes. Dump file (DMP): Contains memory and stack trace information at the time of the crash. Backup File (BKF): A backup used to recover lost data.

Oracle File Types

Oracle database systems make extensive use of multiple file types to store data, metadata, and configuration information. These file types have different functions and purposes:

1. Data File (DBF)

• Stores the actual table and index data
• Typically has a ".dbf" file extension

2. Redo log file (RDO)

• Records changes and transactions to the database
• Ensuring that the database maintains integrity in the event of a failure or crash
• Written in sequential fashion and has a ".rdo" file extension

3. Control file (CTL)

• Stores information about the database structure, table spaces and data files
• Contains the physical location and size information of the database
• Has ".ctl" file extension

4. Parameter file (PFL)

• Stores the configuration information required to start the Oracle instance
• Contains information about options such as database memory size, connection pooling, and security settings
• Has a ".pfl" file extension

5. Server parameter file (SPF)

• Stores configuration information related to starting and stopping Oracle server instances
• Contains information about listener ports, memory limits, and log file locations
• Has ".spf" file extension

6. Trace file (TRC)

• Records the activities and events of the Oracle instance
• For diagnosing and solving problems
• Written in text format and has a ".trc" file extension

7. Dump file ( DMP)

• Created in the event of a database crash or failure
• Contains diagnostic information about memory and stack traces
• for analysis and identification of errors

8. Backup file (BKF)

• Storage backup of database or table space
• Used to recover data loss
• Stored in a specific file format, such as RMAN backup set or Flashback database

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