Installing IBM DB2 Version 9.1
DB2 Installation

IBM DB2 V9.1 is available from the IBM website as a tarball. Extract the tarball using tar xfz and cd into the exp directory.

Run the db2_install script.

When prompted whether to choose a different directory than /opt/ibm/db2/V9.1 to install the software, type no and press return.

When prompted to specify a keyword, type EXP and press return.

When the script completes, DB2 will be installed.

Creating an Instance

A DB2 installation consists of an administration server and one or more instances. Each instance contains one or more databases. The administration server coordinates the instances. The administration server is owned by an OS-level user. Each instance is owned by a seperate OS-level user as well.

To create an instance and an administration server, run /opt/ibm/db2/V9.1/instance/db2isetup, a java-based installation program.

> On the screen titled Welcome to the DB2 Instance Setup wizard, click Next

> On the screen titled Set user information for the DB2 Administration Server, leave the defaults, enter a password into the Password and Confirm Password text boxes and click Next

> On the screen titled Set up a DB2 instance, leave the default radio button checked (Create a DB2 instance) and click Next

> On the screen titled Set user information for the DB2 instance owner, leave the defaults, enter a password into the Password and Confirm Password text boxes and click Next

> On the screen titled Set user information for the DB2 fenced user, leave the defaults, enter a password into the Password and Confirm Password text boxes and click Next

> On the screen titled Configure DB2 instance TCP/IP communication, leave the default radio button checked (Configure), leave the default Service name and Port number and click Next

> On the screen titled Set instance properties, leave the default Authentication type pulldown (Server), leave the default Startup box checked (Autostart the instance at system startup) and click Next

> On the screen titled Prepare the DB2 tools catalog, accept the default "Do not prepare the DB2 tools catalog on this computer" and click Next

> On the screen titled Set up the administration contact list, select the radio button nex to "Do not set up your DB2 server to send notifications at this time". Click Next.

> On the screen titled Start copying files, click Finish.

> A progress dialog will come up. When the process is finished, it will go away.

> On the screen titled Setup is complete, click Finish.

Should you need to create additional DB2 instances, follow this procedure again using a different user name and skipping the steps pertaining to the Administration Server. The /opt/ibm/db2/V9.1/instance/db2ilist command lists all of the DB2 instances on the local computer.

If you need to drop an instance, run /opt/ibm/db2/V9.1/instance/db2idrop instancename, substituting the name of the instance you want to drop for instancename.

The /opt/ibm/db2/V9.1/instance/daslist command lists all of the DB2 administration servers on the local computer.

If you need to drop an administration server, run /opt/ibm/db2/V9.1/instance/dasdrop servername, substituting the name of the administration server you want to drop for servername.

Starting the Database at Boot Time

You can use the following script to start/stop the database at boot/shutdown time.

>     #!/bin/sh

>     case "$1" in
>             start)
>                     /opt/ibm/db2/V9.1/instance/db2istrt
>             ;;
>             stop)
>                     kill -9 `ps -efa | grep db2wdog | grep -v grep | cut -c10-15`
>             ;;
>             *)
>             echo $"Usage: $0 {start|stop}"
>             exit 1
>     esac

>     exit 0

Install this script and run it with the "start" option to start up the database. Running it with the "stop" option shuts the database down. To access a database, it must be running.

During instance configuration, there's a check box indicating whether the instance will be configured to start at boot time. If you didn't check it, to get each instance to start at boot time, you need to run the following command as root for each instance.

> /opt/ibm/db2/V9.1/instance/db2iauto -on INSTANCE_USER

Where INSTANCE_USER is replaced by the username of the user associated with the instance you want to start at boot time.

If you want to disable instances from starting at boot time, you need to run the following command as root for each instance:

> /opt/ibm/db2/V9.1/instance/db2iauto -off INSTANCE_USER

Making the Libraries Available

The DB2 client libraries should be installed in /opt/ibm/db2/V9.1/lib. DB2 client programs (including SQL Relay) need to be able to access these libraries at runtime. The dynamic loader searches for libraries in /lib, /usr/lib and in directories specified in /etc/ld.so.conf or /etc/ld.so.conf.d. Append the following line to /etc/ld.so.conf or create a file in /etc/ld.so.conf.d with the following line's contents (if your system supports ld.so.conf.d) and run /sbin/ldconfig (as root).

> /opt/ibm/db2/V9.1/lib