DataGuard, Read-Only Oracle Home, $TNS_ADMIN and ORA-12154
I’m currently setting up a MAA lab with Oracle 19c and 21c databases running on 2 node cluster with Oracle 21c Grid Infrastructure. When creating the DataGuard configuration I ran into some strange ORA-12154 error messages.
Using a Snapshot Standby Database to test a Characterset Conversion with DMU
Converting a database to a Unicode characterset can be a time consuming work. The Oracle Database Migration Tool for Unicode (DMU) does a really good job. But I cannot predict the duration of such a conversion. And of course, the users want to know the duration of the downtime for the conversion. In this case,…