Sharing the Application Tier File System

I have two node with common storage(SAN) and i am planning to go for Shared APPL_TOP
ie. Form server, web server in Node A
Dbtier, concurrent, admin in Node B
How do i achieve high availably in this case
case 1) if the Node A fails what is the solutions
case 2) if the Node B fails what is the solutions
I thought i would go for shared Appl_top with load balance that means to keep forms and concurrent on both the servers, and Data guard (standby) for Database.
Is the solutions? any suggestion?
Any work around ?
Thanks in advance.

AFAIK, shared Appl_top is usfull when you have more than 2 nodes, for example 2 nodes of froms + web and 1 node CM+admin and the DB.
you can do it of cousre in your case and it will save you patching time for for high aviliblite you need at least 2 nodes of forms+web
maybe others can add on this
fadi.

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