Re: New Schema or New Database?

  Another concern is user rights. When you copy a production database to test, everything in that database is an exact copy of production. If you just import a production schema into a test schema, your users and their roles are not updated.   You will have to discuss your concerns with the developers. The benefits may outweigh the costs.

Jay

>>> Glenn.Travis_at_sas.com 01/21/03 09:53AM >>>
Our DBA group has recently been getting numerous requests for new databases (training, inventory, customer contacts, etc..) from different departments within the company. Our normal procedure is to create a new instance for the database, create the schema, users, etc..., set up backups and turn it over. However, with the volume of requests we are now getting, we are pondering the idea of creating just one instance and giving each database request its own tablespace and schema. (similar to informix and sybase architecture).

My questions for discussion are these; 1) What are the benefits/risks associated with this scenario? Please note that these databases/schemas are unrelated. 2) What questions (for a user questionaire) should we ask regarding their database requirements, which will help us make an informed decision? My concerns are; 1) the inability to tune the instance for one schema/applications performance needs. 2) uptime/availability requirements may differ among the databases. 3) backup/restore scenarios specific to the schema/database (restore just one schema to a point-in-time).

We want to be able to save on memory(sga) and processes by combining the databases into one instance as schemas, but don't want to limit the different applications to 'one-size-fits-all' for performance/recovery scenarios. Any advice would be greatly welcomed.

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Author: Jay Hostetter
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