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OFA file-naming conventions are designed to achieve the following goals: Show which tablespace a data file belongs to Distinguish database files from other files on the system Distinguish between database files belonging to various databases Identify control files, redo log files, and data files easily Table 7-2 clearly shows how an OFA-compliant database enables you to easily manage files belonging to several database versions The example also shows two Oracle home directories, one for Oracle 92 and the other for Oracle 102 There are a total of four mount points The Oracle.

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Now we have to make sure the encrypted passwords are handled correctly. These passwords contain special characters (., /, *, and $) that need to be escaped with a preceding backslash where they appear in the ed script. This operation will ensure that the correct password string is entered in the shadow file.

software is on mount point /u01 and the database files are distributed across three mount points: /u02, /u03, and /u04. Table 7-2. Directory Structure for an OFA-Compliant Oracle Database

/ /u01 /u01/app/ /u01/app/oracle/ /u01/app/oracle/admin /u01/app/oracle/admin/nina/ /u01/app/oracle/flash_recovery_area/ /u01/app/oracle/flash_recovery_area/nina /u01/app/oracle/product/ /u01/app/oracle/product/9.2.0 /u01/app/oracle/product/10.2.0/db_1 /u02 /u02/oradata/ /u02/oradata/nina/ /u03 /u03/oradata/ /u03/oradata/nina/ /u04 /u04/oradata/ /u04/oradata/nina/

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Root directory User data mount point 1 Subdirectory for application software Oracle base directory Directory for the Oracle administrative files Admin subdirectory for the nina database Subdirectory for recovery files Recovery files for the nina database Distribution files Oracle home directory for Oracle9i Release 2 (9.2.0) Oracle home directory for Oracle Database 10g Release 2 (10.2.0) User data mount point 2 Subdirectory for Oracle data Subdirectory for database files for the nina database User data mount point 3 Subdirectory for Oracle data Subdirectory for database files for the nina database User data mount point 4 Subdirectory for Oracle data Subdirectory for database files for the nina database

Although our concern in this chapter is with installing Oracle server software, the storage space necessary for database files (which includes the files for tables and indexes, as well as the files for the redo logs and the undo tablespace and so on) will, in most cases, dwarf the space needed for the installation files. Although nothing prevents you from placing all your database files on one storage device, Oracle recommends that you use a logical volume spread over several disks or use a RAID system. Oracle further recommends that you use the SAME (stripe-and-mirror-everything) technique (see 3). For each of the mount points you select for your database files, you need to issue the following commands as root in order to set the owner, group, and permissions: # mkdir /mount_point/oradata # chown oracle:oinstall /mount_point/oradata # chmod 775 /mount_point/oradata Using the preceding command structure, you can create as many subdirectories for your data files as necessary; for example, /u10/oradata, /u11/oradata, and so on.

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Oracle Database 10g introduces the new flash recovery area, which is a disk area set apart for storing all the recovery-related files. It s a good idea to create it on entirely different storage devices from where you have your data files. You also need to set another parameter, DB_RECOVERY_FILE_DEST, to indicate the location of the flash recovery area. You can set the physical size of the flash recovery area by using the DB_RECOVERY_FILE_DEST_SIZE initialization parameter. Here is how you create the flash recovery area directory: # mkdir /mount_point/flash_recovery_area # chown oracle:oinstall /mount_point/flash_recovery_area # chmod 775 /mount_point/flash_recovery_area For example, you can designate /u20/flash_recovery_area as your flash recovery area, and set the DB_RECOVERY_FILE_DEST_SIZE parameter to 5GB.