Logical host name Question

Question

Hi
Iam in process of creating 2 node cluster on 2 domains.This is for FailOver Clustering
I would appreciate if someone can throw some light and explain if Iam doing right and answer some of the Questions that I had
We have created 2 RG and we are in the process of creating logical host name. Here are the steps that I think Iam going to execute
1> The name of the logicalhost name resources are LH-01 , LH-02
The name of the logical host name are virtualhost-01 , virtualhost-02
The name of the domains are domainapp-01 , domainapp-02
2> Create entry in /etc/hosts for the new logical host name and IP address
Question : Is there any command which can be used to add entries to this files , instead of manually addding them. Iam not a Sys Admin and I do not know how many more places I have to add.
3>Create logicalhostname resources by following commands
a>clreslogicalhostname create -g RG-01 -h virtualhost-01 LH-01
b>clreslogicalhostname create -g RG-02 -h virtualhost-02 LH-02
4>Edit the /etc/nsswitch.conf
Question : I could not understand why we have to do this and what needs to be modified. Do I have to comment out the lines which says
host: cluster files
rpc : files
5>Question : Do I need to also create Shared Address Resource? I really did not understand the concept of Shared Address Resource
I would really appreciate if someone can throw some light on this. I have gone through the documents , but It really did not clear up for me
Thanks
Edited by: Cluster_newbie on Jun 25, 2008 4:06 PM

Answer 1

actually scinstall put this host: cluster files , i dont remember was the the logic
here is some explaination about shared address which used scalable applications like apache
The SUNW.SharedAddress Resource Type
Resources of type SUNW.SharedAddress represent a special type of IP
address that is required by scalable services. This IP address is configured
on the public net of only one node with failover capability, but provides a
load-balanced IP address that supports scalable applications that run on
multiple nodes simultaneously. This subject is described in greater detail
I hope this helps
Regards