Some queries on RAC database 11g

Question

We have RAC oracle database 11g and we don't want to overburden the OLTP instance. So we thought of bringing the changed data from the OLTP instance to reporting instance via logical standby or streams and log the changes with the help of using total recall feature in the reporting instance.
Our idea is to retain the historical data using the total recall feature in reporting instance and bring the changed data from the OLTP instance to reporting instance via logical standby or streams
RAC database: OLTP instance ---> mine the changed data via logical standby or streams ---reporting instance (track all the changes made to a transaction using total recall feature in this instance)
My doubts are:-
1) Whether the total recall feature will work with work with logical standby database or streams?
2) How to transport the total recall feature enabled tables from one database to another. Whether the data pump will work with flashback enabled tables?
3) How to capture the changes from one instance to another with oracle streams. I could not find much documentation on how the streams work on RAC database. Any pointer /suggestion on this would be much appreciated.
Regards,
Richard

Answer 1

user12075620 wrote:
1)     Easy backup and recovery for a specific instance in case of historical dataWhat data will that be? If this is a 3rd RAC instance, then it will not make backup easier as the data is in the database (on shared storage media) and that needs to be backed up - the database's data does not reside locally on the instance.
2)     Point-in-time recovery is possibleAgain, I do not see how this is a specific advantage that now suddenly occurs with the introduction of a 3rd RAC instance.
3)     If any other node fails, then it won’t affect this instance Correct - a 3rd instance increases the redundancy in the cluster. It also scales it and provides additional processing capacity.