Each and every processes in Oracle GoldenGate has it’s own checkpoints to maintain data integrity.
This article explains the different types of checkpoints and the uses of it.
As we know there are multiple processes involved in Oracle GoldenGate replication, the below are the processes which maintains the checkpoint information for each and every operations it does.,
1. Extract or Capture Process
2. Secondary Extract or DataPump Process
3. Replicat Process
This process captures the committed changes from the Redo Log or Archive Log files and writes them to the Trail files called Local Trails. The Extract Process
not only captures the committed changes but also keeps track of all the Open transactions so that it ensures that it does not misses any data or no data loss.