IBM

9.4.1 Preparing

Basically, the same considerations as for Deployment Manager high availability also apply for Node Agent and appserver HA: - As described in Deployment Manager high availability, specifically in the Preparing section, there are two different ways to install WebSphere on a platform specific cluster:

a. Installing the binaries on shared disks that are accessible by all cluster members.

b. Installing the binaries locally on every cluster member and placing only the profiles onto the shared disks.

Even though either method is applicable, we recommend to use the second option as long as there are no disk space issues. - To install WebSphere V6, you have to:

a. Install the binaries.

b. Create a profile.

Depending on the chosen installation method, the binaries and the profile are located on the same disk or mountpoint (in case of a volume), or separated. - On a platform-specific, IP-failover based cluster, make sure that your host name is bound to your IP Alias (Virtual IP Address). You have to provide the DNS name that is mapped to that IP Alias as the Host name during profile creation.

Example 9-2 Checking the DNS mapping of the IP Alias 

$ nslookup your_ip_address

Redbooks ibm.com/redbooks

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