We are currently having one Oracle instance on RAC with one database created. A new requirement came to our database team to temporarily (1-2 months) host a new application that is independent of existing one and after that we will migrate it to a new RAC.
Our technical teams discuss two options: the first suggestion is to create a new database (instance) for that application and the other is to have another schema on the same database.
From performance (how much is the overhead when creating a new instance compared to having the database on the same instance), administration (security, troubleshooting, backup, etc..) and migration perspectives, which option is better considering that we want to seamlessly migrate to the new server without complications or long outage.
