GoldenGate

Hi can anybody suggest which way will be the better option for data sync up between two databases for an Active-Active golden gate configuration???

I am thinking of using datapump, but one data base will be active for accessing and one active node will be brought down for sync up, i am not getting if one node is active and we perform datapump in that gap there will be new tx's comming to DB right, so i feel sync up is not possible with datapump. I am not able to figure out faster tool to sync up data so as to implement GG on them.

Anybody comes out with suggestion will be appreciated.

Thank You