Comments on: Sharing only the APPL_TOP in 11.5.10

By: Arnoud Roth

Arnoud Roth — Mon, 06 Aug 2007 23:47:02 +0000

Gareth, the reason for not sharing the 806 and iAS O_H lies in the fact that they provide the engine for running the application. If either your 806 or iAS O_H is damaged, it could mean your application becomes completely unavailable. This will not be the case when you have non-shared ORACLE_HOMEs. The APPL_TOP can remain shared, because damage to the APPL_TOP will only affect parts of your application, not the application in its entirety (unless, ofcourse, when the filesystem becomes corrupt and unavailable). By the way, sharing stuff is normally not done when it comes down to high availability. It can be used for ease of management.

By: Gareth

Gareth — Fri, 13 Jul 2007 04:41:31 +0000

Hmm, interesting post, great to get these types of scenarios out in the open.

I understand not sharing the database ORACLE_HOME due to RAC. When I see “Applications Technology Stack” for me it implies the 8.0.6 and iAS ORACLE_HOMEs – having the RAC issues intertwined here makes things a bit fuzzy. I’d normally want to be sharing the 8.0.6 and iAS homes with the APPL_TOP as they are effectively one unit, e.g. Apps exec linked to 8.0.6 execs, whereas the database ORACLE_HOME is independent.

I’m a little stretched to work out the motivation for having the technology stack (8.0.6/iAS homes) non-shared, can you explain?

Thanks,
Gareth