expdp

Import order matters for GoldenGate instantiation filtering

When migrating a large database with GoldenGate, most of the volume is sometimes in old partitions which no longer change. A common shortcut is to move them first with expdp/impdp, even before GoldenGate is set up. Everything else, the(…)

GoldenGate instantiation CSN explained

For more than ten years (GoldenGate 12.2, released in 2015), GoldenGate has provided a way of performing initial load of tables with a per-table instantiation CSN. But when migrating a database or just performing the initial load of(…)

Extract all DDL from an Oracle database

Introduction Extracting DDL is sometime useful for creating similar objects in another database without data. Basically everything can be extracted from a running Oracle database. The needs My customer asked me to replicate a database without any data. The goal(…)

Speed up datapump export for migrating big databases

Introduction Big Oracle databases (several TB) are still tough to migrate to another version on a new server. For most of them, you’ll probably use RMAN restore or Data Guard, but datapump is always a cleaner way to migrate. With(…)