High Availability Data Guard, Sharding and Global Data Services (MOSC)

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Data guard cluster linux

 
Dear Oracle Experts,

I will describe the high availability architecture that I have mounted in a test environment:

- In Main building (MB):
I have a cluster linux RHEL 5.4 server1 and server2, oracle is installed on each server with a shared
filesystem that stores the database. So the database (sid, listener, filesystem) is in one node and if this node
down the database (sid, listener, filesystem) migrate and another node.

- In Disaster Recovery building (DRB):
The same architecture with cluster linux and besides physical Data Guard between primary-database (in main
building) and standby database (in DRB).

I have some questions about that:

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