We’ve already discussed how to migrate databases from a standalone 12.2 database to a pluggable database (PDB) in a 19c container in the Oracle cloud. But what if the target container database (CDB) is already part of a Data Guard configuration and has several PDB in it? I will try to go through the main steps on how to do that without breaking the replication.
Continue reading “Migrating a new PDB to the existing 19c DataGuard on ExaCC.”Tag: Migration
Moving Oracle database to the cloud. 12.2 standalone to 19C RAC PDB.
I see more and more Oracle databases are moving to the public cloud or to a hybrid cloud solution. Depending on the platform, size and used options it could be a different path but the general approach boils down to three main options – Oracle RMAN backup and restore, Oracle Data Guard or Oracle Data Pump with or without transportable tablespaces. Here I want to share our approach for migration from 12.2 standalone database to 19c RAC container as PDB in the Oracle Cloud Infrastructure (OCI).
Continue reading “Moving Oracle database to the cloud. 12.2 standalone to 19C RAC PDB.”Oracle Zero Downtime Migration troubleshooting.
The Oracle Zero Downtime Migration (ZDM) tool has been created to help with Oracle databases migrations. It saves time and automates many tasks. The saved effort is getting bigger and accumulates on scale when you need to move multiple databases. Behind the scenes it uses the very well known Oracle Data Guard. As a result you have good solid technology on the basis but at the same time limited to what the DataGuard can do and what it cannot. All details and documentation are available here. The tool works fine when all prerequisites are met but when you hit an issue you need to dig in and troubleshoot. Here I will try to share some experience with the ZDM troubleshooting. Please note that the information in the blog is actual for the 19.2 version of ZDM and it is possible that the behaviour will be different in the future versions.
Continue reading “Oracle Zero Downtime Migration troubleshooting.”