DB2 Integrated Cluster Environment Deployment Guide

Chapter 4. Implementation 163

3. Verify that all related host names can be resolved.

Verify that all related host names and switch names can be resolved on all

participating computers using DNS or the /etc/hosts file.

4. Prepare the .rhosts file.

In a partitioned database environment, each database partition must have the

authority to execute remote commands on all the other participating

computers. Update the .rhosts file of the instance owner to accept remote

command invocations (see “Enable remote shell” on page 151).

4.3.5 Instance creation

To create an instance, follow the steps below.

1. Create an instance.

Only the root user can create an instance. The instance creation command

syntax is as below.

/opt/IBM/db2/V8.1/instance/db2icrt -s ESE -u fenceuser owneruser

fenceuser is a fence user name and owneruser is an instance owner user

name.

Switch to the owner user and test if you can start the instance.

# su - db2inst1

# db2start

2004-07-17 17.51.30 0 0 SQL1063N DB2START processing was

successful.

SQL1063N DB2START processing was successful.

In this example, we assume the owner is db2inst1. Do not forget to stop the

instance for now.

2. Enable client connections.

To make a DB2 instance accept connections from database clients over

TCIP/IP, you must update a registry variable and a database manager

configuration parameter.

# db2set DB2COMM=TCPIP

Note: If you plan to configure your instance with failover capability, two

cautions must be taken to make NFS service highly available. First, you

must place the home directory in a shared storage, not in a local disk, so

that either computer can take over the home directory for NFS service.

Second, every computer should include the same entries for the home

directory in /etc/exports and /etc/fstab for the home directory.