Repository Database
If the Talend Data Catalog repository database server must be migrated to a new machine (e.g. from on prem to cloud), make sure you follow the proper the proper database vendor process (see Database Server Backup/Restore).
Note that the above process works well if you stay with the same database technology (e.g. PostgreSQL), but such database cannot be performed between database technologies, such as Oracle or SQL Server to PostgreSQL because the repository database implementations are different / optimized for each database technology. In such case, one can use the Talend Data Catalog Application's Backup/Restore format (directories of XML files) but there are known limitations as some content is not back up in that format.