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Managing multilpe standbys with real time apply only on one

Oracle 11gr2 Enterprise Edition

DGMGRL is used and there is a brooker

I am maintaining two (physical) standby instances each on separate servers (windows 2012 64 bit), one is available as an active (real time apply) instance, the other is not (it is normally in mount mode)

I am using database triggers on instance start up to create services so that the users are directed to the primary instance if the are running the application, and if they are running read only i.e.  business object or adhoc sql they are pointed to the active standby instance, with no connections made available to the 'true' standby.

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