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In this lesson, we'll be
planning an installation
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of the Oracle software.
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So let's say we want
to install Oracle,
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and we have to do the proper
planning up front in order
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to make sure that the
software installation performs
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well and is easily configurable,
and things of that nature.
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So first and foremost,
let's keep in mind
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here that we're looking at
doing a software installation.
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We're not doing anything else.
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We're not installing
a database, we're not
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configuring a
database or a template
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or anything of that
nature, we're just
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installing the software.
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So the software is available
at this URL that you see here.
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And again, it's
freely downloadable
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for your own personal use.
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So if you're wanting
to learn Oracle,
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this is a great place to start.
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So if we take a look at
it, this is that site.
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And we can just go
down to Database.
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We accept the license agreement.
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And then we simply
download the files,
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so we have to choose what
platform we're using,
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be it windows Linux, Solaris,
whichever of these platforms
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is available.
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We download each of these files,
and then we'll unzip them.
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The Oracle installation
files are also
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available via a media pack
from Oracle, if you so desire.
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So if you're one of
the people that really
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likes to have a hard
copy on the CD--
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on the DVD, in this
case, I suppose--
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then you can get that from
Oracle via the media pack.
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It's a fairly nominal charge
to have that sent to you.
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So let's talk about
the prerequisites.
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So what kind of hardware
do we need in order
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to run an Oracle
database server?
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One of the most striking
things for us to understand
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is that we don't need
a server class machine.
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A home machine is
perfectly adequate
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for running an Oracle
installation, in most cases,
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as long as it's a newer version
of the operating system,
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relatively new hardware.
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From a processor
standpoint, Oracle
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will support either
Intel or AMD,
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and also on 32-bit or
64-bit architectures.
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However, it's worth
noting that at this time,
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Oracle 12C is only available
on 64-bit architectures.
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From a memory standpoint, we
need about a gig of memory,
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one gigabyte in order
to run the installer
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and perform the installation
of the software.
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Again, this is different
than what we might
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require for running database.
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This is just to do
the installation.
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Virtual memory in Windows, or
swap space in Linux and Unix--
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generally, you want to have
1.5 times the amount of RAM.
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If you have very, very
large amounts of RAM,
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there is a bottom line minimum
of 16 gig for swap space.
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And for the
installation disk space,
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we're looking at about four
gigabytes of hard drive space.
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That's the hardware.
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So from a software perspective,
what do we need to have?
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If we look at operating
systems, Oracle
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will run on all of the
current Windows OS versions,
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so that's Windows 7, Windows
Server, Windows Vista.
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It still runs on XP, as well.
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From the Linux side,
if we want to run
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an installation of
Oracle on Linux,
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Oracle supports about four
different Linux distributions
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to run the Oracle database.
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And they include Oracle
Linux, obviously,
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Red Hat Linux, which
Oracle Linux is directly
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compatible with, Suse
Linux, and Asianux,
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which is an Asian version of
Linux that's popular in China.
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It's worth noting
that it can be made
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to run on other distributions
as well, such as Gentoo,
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Slackware, Debian.
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Those distributions
can also run Oracle.
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There just have to be
some modifications made.
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Some of them are no more
complex than simply changing
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one of the configuration files.
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There's a file that looks
for these distinct versions,
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and it can be altered.
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Some other distributions may
require things like packages
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to be updated, the GCC and the
GLIPC, some of those packages
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that are important to Linux.
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We also need to set up accounts
for an Oracle installation.
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In Windows this is as
simple as having a user
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with administrator privileges.
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In Linux or Unix, generally
we want an OS user
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account called Oracle.
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Now it can be named
something else,
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but general industry standard
is to create an Oracle user
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account.
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And that's the account we
run the software installation
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program with, and then it said
that Oracle owns the software
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installation.
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We also want an OS
user group called DBA,
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and this is going to
directly influence
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the privileges that users have
when they log into that server
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itself.
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We also need to
understand a couple
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of environment variables.
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Now these are established by
Oracle during the installation.
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So this isn't something we need
to pre-configure, necessarily,
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but we need to understand them.
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The first is the ORACLE_BASE
environment variable,
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and that is simply
a software location.
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So that's just going
to be a directory.
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So it might be a C:/Oracle,
or it might be /home/Oracle
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in a Linux distribution.
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So however that is
set, and that would
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be established during
the installation process.
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The second environment
variable is the ORACLE_HOME.
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So the Oracle base is going to
be the location for all Oracle
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software.
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So if we had a machine
that had an Oracle
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database and a WebLogic
server, and so on and so forth,
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all of that software would
go within the ORACLE_BASE.
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The ORACLE_HOME is different
because that is the database
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software location.
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So all of the database
software that we install
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goes to that specific location.
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And there's a number
of tools and scripts
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and many other things that
we'll find in the ORACLE_HOME.
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So the ORACLE_BASE has a certain
level of importance for us,
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but the ORACLE_HOME is
crucial to understand.
10354
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