Oracle catalog description

Hello everyone, and welcome to Oracle tutorial (Four, Oracle catalog Description)

1. admin directory
   Description: Oracle configuration example of the recording, file operation logs, each instance of an object of
              record, the SID: Abbreviation SystemIDentifier is the only mark Oracle instance,
              one example of a database operation only in Oracle, if a plurality of mounting libraries that
              it will have more than one instance, we can be distinguished by example SID.
2. cfgtoollogs Catalog
   Description: The following subdirectories are stored log when run dbca, emca, netca other graphical configuration time program of.
3. checkpoints directory
   Description: The store checkpoint files.
4. diag directory
   Description: A directory restructuring Oracle11g added, which subdirectories, Oracle basically
              each component has its own separate directory, in Oracle10g we criticized a
              log file, scattered on four of the matter was settled, whether or asm crs
              or rdbms, all components need to be used to diagnose the log files are stored in this new
              directory.
5. flash_recovery_area (Flashback district) directory
   Description: Flashback District: assign a specific directory location to store some specific file restoration,
              for centralized and simplified management database recovery. Flashback area can store the full number of
              data file backup, incremental backup copy of the data file, the current control file, backup
              control file, spfile file, snapshot control files, online log files, archive
              logs, block tracking files, flashback logs .
6. oradata directory
   Description: store data files
   • CONTROL01.CTL
     Description: Oracle database control file
   • EXAMPLE01.DBF
     Description: Oracle database table space file
   • REDO01.LOG
     Description: Oracle database redo log file, this file has three
   • SYSAUX01.DBF
     Description: 11g tablespace newly added, in addition to the main data dictionary to store
                other data objects outside of the system is automatically maintained by the internal
   • SYSTEM01.DBF
     Description: used to store data within the system tables and Oracle data dictionary. For example: the table names, column names, user names, etc.
   • TEMP01.DBF
     Description: Temporary table space file
   • UNDOTBS01.DBF
     Description: undo tablespace file to save the data rollback
   • USERS01.DBF
     Description: user table space
7. product catalog
   Description: The database instance storage of files