How to add two protection mode in oracle data guard

Hi all,
We have a discussion on oracle physical data guard yesterday.....
As we all know that data guard has 3 protection mode
1. Maximum Performance
2. Maximum Availability (Default)
3. Maximum Protection
Now we were discussing about is it possible to have two protection mode on same data guard simultaneously... for e.g. Maximum performance and maximum availability.
We have searched a lot but don't find any help on google.
Can any one help on this with any doc, pdf or links..
Thanks & Regards

Hi,
you don't find anything on this because it's not possible and would make no sense even if you could do it.
Maximum Availability uses SYNC commit between primary and standby db. If you combine Max. Availabilty with Max. Performance then your db clients have to wait on commit until primary and the max. availability standby have commited. That they would not have to wait on another Max. Performance DB doesn't change anything to the client. You would only combine the disadvantages of both approaches, the wait on sync commit for max. availability and beeing not in sync with primary for the max. performance db.
The max. protection mode requires by definition that the primary db shuts down in case no standby can process the commit. If the primary is not up and running it is pointless to have another (max. availability) standby db at hand, if this max. availability db would take over the service this would violate the defintion of max. protection. No Dataloss is valued higher than db availability, having the data commited only on one db site is not allowed.
Regards
Thomas

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How to add two protection mode in oracle data guard

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