Physical storage structure of Oracle Database Structure

Physical storage structure of Oracle Database Structure 1 , Physical storage structure 1.1 Data Files

Data files are used to store all database data. Storing data in multiple data files and storing data files in Different Hard disks can improve the access speed.

1.2 Record File

Record Files are also called redo log (transaction) files. Redo logs work cyclically in log files. Archive log mode and non-archive log mode are available.

1.3 Parameter file

EveryOracleBoth databases and instances have their own uniqueInit. oraFile.Init. oraThe value in the file determines the characteristics of the database and instance.

1.4 Control File

each database must have at least one control file, however, we recommend that you use two or more control files and store them on different disks. The control file is a very small file, which stores some files with Oracle key information related to all files in the database. Oracle the system maintains database integrity through control files and determines which redo logs are used to restore data. When all Database Control files are lost, Oracle A command is provided to create a control file, which can be used to recreate the control file in most cases.