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• If you didn’t provide any of these values, add _eph postfix to your source PDB name.

• If your source PDB name is bucket_01, then your value will be bucket_01_eph

Then you will create the tnsnames.ora file that contains a dev alias for DEV DbDef, dev_eph alias, and admin_sysoper alias for DEV_EPHEMERAL DbDef.

If you have a dev entry in your TNS file, then you should create an alias for the dev_eph entry which points to the ephemeral copy .(admin_sysoper is just an example entry for a connection pointing to ORCLCDB)

Example tnsnames.ora file:

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