Best way to have a 'standby' apps node

Hi,
We're in the process of discussing several options for creating a standby application node in another data center. For the database we've decided to use Data Guard. But we're divided on the Application node.
I'm of the view that we should have a separate independent server on the DR site that has the same installation and file setup as on the primary site. Whenever we patch, we can run rysnc to propagate the changes to the dr site. This way, we can have independent two servers and we can even patch on the primary and delay the propagation to the standby until we're satisfied everything is OK.
The other colleagues think we can use the IBM Power HA to make a cluster between the two nodes and have a virtual ip through which the clients connect. The two nodes will have shared file-systems. If we patch the primary we don't need to patch the 'standby' since it's s shared file system cluster. But during patching, there's no 'freezing' window, so the only fallback option is the back.
Based on this, which option can work correctly. The environment is ebs release 12.1.1 and oracle 10g release 2 on IBM aix 6.1
dula

Hi,
In Apps tier ,there is no certified /supported method for standby server like datagurad in DBTier
The best solution is to perform the clone of PROD instance everyday and copying the files to target instance or some otehr location
becos the application tier files are instance-specific and maintained by auto-config so keeping the cluster and other ideas wil give error when u trying to up the the standby instance and during the ad sessions like patching and running adadmin
if you going to keep the same hostname and same filestructure means u can try the simply copying the files or automatic copying of files thro cluster..
-Rathina

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