old-www/HOWTO/DB2-HOWTO/prerequisites.html

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><A
NAME="prerequisites"
></A
>4. Prerequisites</H1
><P
>Prerequisites are the hardware and software elements needed on your
system before you can install and use DB2 Express-C 9. This section covers:
</P
><P
></P
><UL
><LI
>Hardware requirements:
<P
></P
><UL
><LI
>Supported processors</LI
><LI
>Disk space requirements</LI
><LI
>Memory requirements</LI
></UL
></LI
><LI
>Software requirements:
<P
></P
><UL
><LI
>Linux distributions</LI
><LI
>Kernel levels and libraries requirements</LI
><LI
>Additional software requirements</LI
></UL
></LI
></UL
><DIV
CLASS="sect2"
><H2
CLASS="sect2"
><A
NAME="AEN69"
></A
>4.1. Hardware requirements</H2
><DIV
CLASS="sect3"
><H3
CLASS="sect3"
><A
NAME="AEN71"
></A
>4.1.1. Supported processor architectures</H3
><P
></P
><UL
><LI
>x86 (32-bit processor)</LI
><LI
>x86&#8211;64 (64-bit processor)</LI
><LI
>POWER&#8482; (any iSeries&#8482; or pSeries® that
supports Linux)</LI
></UL
></DIV
><DIV
CLASS="sect3"
><H3
CLASS="sect3"
><A
NAME="AEN77"
></A
>4.1.2. Disk space requirements</H3
><P
>Take into account the disk space requirements before you install and
configure DB2 on your distribution:
<DIV
CLASS="table"
><A
NAME="AEN80"
></A
><P
><B
>Table 1. Disk space requirements</B
></P
><TABLE
BORDER="1"
CLASS="CALSTABLE"
><THEAD
><TR
><TH
WIDTH="33%"
ALIGN="LEFT"
VALIGN="TOP"
><P
>Install type</P
></TH
><TH
WIDTH="33%"
ALIGN="LEFT"
VALIGN="TOP"
><P
>Description</P
></TH
><TH
WIDTH="33%"
ALIGN="LEFT"
VALIGN="TOP"
><P
>Required disk
space</P
></TH
></TR
></THEAD
><TBODY
><TR
><TD
WIDTH="33%"
ALIGN="LEFT"
VALIGN="MIDDLE"
><P
>Typical</P
></TD
><TD
WIDTH="33%"
ALIGN="LEFT"
VALIGN="MIDDLE"
><P
>DB2 is installed with most features
and functionality, including graphical tools such as the Control
Center.</P
></TD
><TD
WIDTH="33%"
ALIGN="LEFT"
VALIGN="MIDDLE"
><P
>460 to 560 MB</P
></TD
></TR
><TR
><TD
WIDTH="33%"
ALIGN="LEFT"
VALIGN="MIDDLE"
><P
>Compact</P
></TD
><TD
WIDTH="33%"
ALIGN="LEFT"
VALIGN="MIDDLE"
><P
>DB2 is installed with basic features
and functionality, but without the graphical tools.</P
></TD
><TD
WIDTH="33%"
ALIGN="LEFT"
VALIGN="MIDDLE"
><P
>380 to 460 MB</P
></TD
></TR
><TR
><TD
WIDTH="33%"
ALIGN="LEFT"
VALIGN="MIDDLE"
><P
>Custom</P
></TD
><TD
WIDTH="33%"
ALIGN="LEFT"
VALIGN="MIDDLE"
><P
>This option allows you to select the
features and functionality that you want to install.</P
></TD
><TD
WIDTH="33%"
ALIGN="LEFT"
VALIGN="MIDDLE"
><P
>320 to 820 MB</P
></TD
></TR
></TBODY
></TABLE
></DIV
>
</P
><P
>It's important to allocate enough disk space for the software, along
with the product documentation (if desired) and the databases you create.
</P
><P
>&#13; In DB2 9, product documentation is accessed through the DB2 Information
Center, either via the web, or as a local system installation. To install
this locally requires at least 100 MB when installing the core English
language files. Additional space is required for other additional languages. If
disk space is an issue, you can configure DB2 to access the Information
Center from the Web. More detail about this is provided in
<A
HREF="help.html"
><I
>Installing the DB2 Information Center</I
></A
>.
</P
></DIV
><DIV
CLASS="sect3"
><H3
CLASS="sect3"
><A
NAME="AEN119"
></A
>4.1.3. Memory requirements</H3
><P
>We recommend that you should allocate a minimum of 512 MB of RAM for
DB2 Express-C 9, and additional memory should be allocated for other
software and communication processes. When determining memory
requirements, consider the following points:
<P
></P
><UL
><LI
>Your SWAP space should be at least twice as much as your RAM.
</LI
><LI
>Additional memory should be allocated for any non-DB2 software
that may be running on your system.
</LI
><LI
>Additional memory is necessary to support database clients and
database activity.
</LI
><LI
>These memory requirements will be affected by the size and
complexity of your database system, as well as specific performance
requirements.
</LI
><LI
>The maximum RAM allowed for a DB2 Express-C installation is 4 GB.
</LI
></UL
>
</P
></DIV
></DIV
><DIV
CLASS="sect2"
><H2
CLASS="sect2"
><A
NAME="AEN128"
></A
>4.2. Software requirements</H2
><DIV
CLASS="sect3"
><H3
CLASS="sect3"
><A
NAME="AEN130"
></A
>4.2.1. Distribution levels that are supported by DB2 Express-C 9</H3
><P
>For a list of all the distributions that are officially
supported, as well as the latest information about kernels, libraries,
integrated cluster environments, and papers, visit the <A
HREF="http://www.ibm.com/software/data/db2/linux/validate/"
TARGET="_top"
>DB2 for Linux
validation</A
> web site listed in <A
HREF="resources.html"
><I
>Resources</I
></A
>.
</P
></DIV
><DIV
CLASS="sect3"
><H3
CLASS="sect3"
><A
NAME="AEN135"
></A
>4.2.2. Additional software requirements</H3
><P
>Depending on your DB2 requirements, you may be required to install
additional software packages for DB2 to function properly. Make sure that
these software packages are installed prior to using DB2.
<P
></P
><UL
><LI
><P
>X Window System software, capable of rendering a graphical
window manager (KDE, Gnome, etc.). You will need this if you want to
use the DB2 graphical installer, or any of the DB2 graphical
tools.</P
></LI
><LI
><P
>A web browser, to view topics in the DB2 Information
Center.</P
></LI
><LI
><P
>If you are using NIS or NIS+ for security
authentication on your system, you must create DB2 user accounts
before installing DB2.</P
></LI
><LI
><P
>Additional packages, as outlined in the following table:
<DIV
CLASS="table"
><A
NAME="AEN147"
></A
><P
><B
>Table 2. Package requirements</B
></P
><TABLE
BORDER="1"
CLASS="CALSTABLE"
><THEAD
><TR
><TH
WIDTH="16%"
ALIGN="LEFT"
VALIGN="TOP"
><P
>Package name</P
></TH
><TH
WIDTH="25%"
ALIGN="LEFT"
VALIGN="TOP"
><P
>RPM name</P
></TH
><TH
WIDTH="58%"
ALIGN="LEFT"
VALIGN="TOP"
><P
>Description</P
></TH
></TR
></THEAD
><TBODY
><TR
><TD
WIDTH="16%"
ALIGN="LEFT"
VALIGN="MIDDLE"
><P
>compat-libstdc++</P
></TD
><TD
WIDTH="25%"
ALIGN="LEFT"
VALIGN="MIDDLE"
><P
>compat-libstdc++</P
></TD
><TD
WIDTH="58%"
ALIGN="LEFT"
VALIGN="MIDDLE"
><P
>Required by 64-bit
architectures only. Required for backwards compatibility
with standard C++ libraries used by DB2.</P
></TD
></TR
><TR
><TD
WIDTH="16%"
ALIGN="LEFT"
VALIGN="MIDDLE"
><P
>nfs-utils</P
></TD
><TD
WIDTH="25%"
ALIGN="LEFT"
VALIGN="MIDDLE"
><P
>nfs-utils (version 1.0 or later)</P
></TD
><TD
WIDTH="58%"
ALIGN="LEFT"
VALIGN="MIDDLE"
><P
>Network File System support
package. It allows access for local files to remote
machines. Required for systems utilizing NFS mounted
drives.</P
></TD
></TR
></TBODY
></TABLE
></DIV
>
To check whether you have these packages installed, use the
<B
CLASS="command"
>rpm -q</B
> commands:
<TABLE
BORDER="0"
BGCOLOR="#E0E0E0"
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><TR
><TD
><FONT
COLOR="#000000"
><PRE
CLASS="screen"
>rpm -qa compat-libstdc++*</PRE
></FONT
></TD
></TR
></TABLE
>
</P
><P
>To install these packages on Red Hat Linux, use the Red Hat
Linux installation CDs and the <B
CLASS="command"
>rpm</B
> command, or
the <B
CLASS="command"
>up2date</B
> utility. For example, to install
the compat-libstdc++ package from the Red Hat Linux CD, mount the
Red Hat Linux CD #4, and enter this command as root:
<TABLE
BORDER="0"
BGCOLOR="#E0E0E0"
WIDTH="100%"
><TR
><TD
><FONT
COLOR="#000000"
><PRE
CLASS="screen"
>rpm -ivh /mnt/cdrom/RedHat/RPMS/compat-libstdc++-296-2.96-132.7.2.i386.rpm</PRE
></FONT
></TD
></TR
></TABLE
>
To install using the up2date package, run this command as root:
<TABLE
BORDER="0"
BGCOLOR="#E0E0E0"
WIDTH="100%"
><TR
><TD
><FONT
COLOR="#000000"
><PRE
CLASS="screen"
>up2date compat-libstdc++</PRE
></FONT
></TD
></TR
></TABLE
>
</P
><P
>To install these packages on SUSE Linux, you can also use
<B
CLASS="command"
>rpm</B
> or use the handy YaST (Yet another Setup
Tool) utility. For example, to install nfs-utils on SLES 9
using YaST:
<P
></P
><OL
TYPE="1"
><LI
><P
>Log on as root</P
></LI
><LI
><P
>From the YaST Control Center, select Software -&#62;
Software Management, then use the search "nfs-utils" to find the
appropriate packages.</P
></LI
></OL
>
</P
></LI
></UL
>
</P
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