ISYS366

04/20/23 ISYS366 - Installation 1

ISYS366

Installation


System Architectures Process View

Dedicated servers Multi-threaded servers

Processor View Single processor systems Multi and parallel processor systems

Database View Two-phase commit Replication


Mirroring & RAID Eats up a lot of disk RAID 1(Redundant Array of

Inexpensive Disks) – good for temporary tablespace datafiles, control and log files (provides for redundancy)

RAID 5 – better for OLAP, DSS and DW because writes are so much slower on RAID 5


Installation Before installation – full backup Read disk and memory

requirements Oracle10g?

512MB RAM?, 1G?, ????? 1G to several Gig HD


Installation Types of Installation

Upgrade – basically, you are overwriting old files

Migration – you are creating a new directory structure, etc. and copying the datafiles.

Migration is preferable to upgrade. Suggested configuration

Development server QA server Production server


Installation Check the EXACT version of your

operating system Get the EXACT installation manual for

your OS Try installing a default instance and

“poke around” NB – Oracle block sizes (8+) should be

MULTIPLES of the OS block size O8i – you can connect as INTERNAL

through SQL*Plus


An Example using Oracle UNIX

Check and configure shared memory Create /u01 for S/W and /u02-/u04 for databases Create a DB admin group in UNIX Create UNIX Oracle account Name is usually Oracle Home is ORACLE_HOME Assign default shell Et cetera (environ variables, umask values, etc.) oratab (/var/opt/oracle)


Separating Objects (on devices)

Prevents I/O bottlenecks and contention Raw Disk (partitions) – for both UNIX and NT Up to 40% performance improvement Why you need a file handling facility like

Oracle's to take advantage of this (compare Ingres)

Oracle Parallel Server requires it. UNIX and NT buffer cache bypassed


Separating Objects (on devices)

Raw disk must be owned by Oracle (UNIX)

Oracle block size must be multiple of the physical (disk) block size

Only one data file per raw disk partition

Put raw disk partitions on separate physical device


Separating Objects (on devices) Comparison to SQL Server and

Ingres file management SQL Server Ingres

Separate disks for different type of files

Separate datafiles for data, index, TBS and temp tablespaces

Ensures integrity


After Installation Assign user SYSTEM to a new

default tablespace and default temporary tablespace (leave SYS alone)

Create a script that will assign all new users to a user tablespace and a default user temporary tablespace


After Installation You can examine the tablespaces

from DBA_TABLESPACES or USER_TABLESPACES

Other system information from SHOW PARAMETERS, or the V$PARAMETERS table


Moving Database Files Systems may be tuned after being created Shut down instance

Move file (via op sys commands) Start up the Server Manager, start up the instance, then

execute the following command:

Alter database rename '/u02/data/mesh97-1.dbf' to

'/u03/data/mesh97-1.dbf' Restart the instance

Documents

ISYS366