Author: Adam Leszczyński <aleszczynski@bersler.com>, version: 1.9.0, date: 2026-02-17 |
Previous chapter: Replication
OpenLogReplicator needs a source-schema image to identify objects relevant for replication. The schema is loaded from the source database at startup. On subsequent runs, the schema is loaded from the local store.
The schema is a consistent image of selected database system tables.
Data is read using AS OF SCN to ensure consistency.
If the database load or undo retention prevents a consistent read, create the schema using the provided gencfg.sql script on a copy of the database.
During the first run, checkpoint files are created.
By default, they are placed in the checkpoint directory, but this location is configurable.
Each checkpoint file contains a copy of the schema and is associated with a specific SCN.
Next chapter: Checkpointing