User`s guide

iv
2 Architecture and Implementation
2.1 Operating System Environment ............................................................................................... 2-1
2.1.1 File Systems .......................................................................................................................... 2-1
2.1.2 POSIX Shell........................................................................................................................... 2-2
2.1.3 Processes ............................................................................................................................... 2-2
2.2 Basic Structures ........................................................................................................................... 2-2
2.2.1 Database Files and Log Files.............................................................................................. 2-2
2.2.2 Other Oracle Database Files............................................................................................... 2-3
2.2.2.1 Initialization File........................................................................................................... 2-3
2.2.2.2 Server Parameter File................................................................................................... 2-3
2.2.2.3 ORAENV File................................................................................................................ 2-3
2.2.2.4 Control Files .................................................................................................................. 2-3
2.2.2.5 Message Files................................................................................................................. 2-3
2.2.3 Oracle-Managed Files ......................................................................................................... 2-4
2.2.4 Bigfile Tablespaces............................................................................................................... 2-5
2.3 Two-Task Mode .......................................................................................................................... 2-5
2.4 Address Space Planning ............................................................................................................ 2-5
2.4.1 Oracle Database Data Area Placement............................................................................. 2-5
2.5 Oracle Database Environment Definition File........................................................................ 2-6
2.5.1 Generating ORAENV.......................................................................................................... 2-6
2.5.2 Oracle Environment Variables........................................................................................... 2-7
2.5.3 Running ORAENV .............................................................................................................. 2-7
2.5.4 POSIX Environment and ORAENV File .......................................................................... 2-7
2.6 The ORALOAD Library............................................................................................................. 2-9
2.7 The ORAMESG library............................................................................................................... 2-9
2.8 User ID Requirements................................................................................................................ 2-9
2.8.1 Installation User ID (ORAUID) ......................................................................................... 2-9
2.8.1.1 Authorizations and File Access Rights...................................................................... 2-9
2.8.1.2 Default Name ............................................................................................................ 2-10
2.8.2 DBA User ID...................................................................................................................... 2-10
2.8.2.1 Authorizations and File Access Rights................................................................... 2-10
2.8.2.2 Default Name............................................................................................................. 2-11
2.8.3 User IDs for Oracle users................................................................................................. 2-11
2.8.3.1 Authorizations and File Access Rights................................................................... 2-11
3 Oracle Database Installation and Deinstallation
3.1 Overview of Oracle Database Installation............................................................................... 3-1
3.2 Planning the Installation............................................................................................................ 3-1
3.3 Oracle Database Preinstallation Requirements ...................................................................... 3-2
3.3.1 Checking Hardware Requirements................................................................................... 3-2
3.3.1.1 Memory Requirements................................................................................................ 3-2
3.3.1.2 System Architecture..................................................................................................... 3-3
3.3.1.3 Disk Space Requirements............................................................................................ 3-3
3.3.1.4 Display Requirements.................................................................................................. 3-4
3.3.2 Checking Software Requirements..................................................................................... 3-4
3.3.2.1 Operating System and Communication System Requirements ............................ 3-5
3.3.2.2 POSIX Parameters ........................................................................................................ 3-5