We are currently designing an application that will be exposed to multiple 
customers, and are therefore evaluating seam. The question we are currently 
discussing is how to separate the customers? data. Generally I would consider 
three alternatives: 

1) Sharing the same database and schema. Associating every record with one 
client by using an ID.
2) Sharing the same database, but using separate schemas. This would mean that 
the tables in the schema that hold client specific data would be created for 
each client and identified via the table name (e.g. client1_data, client2_data 
etc.).
3) Using separate databases. And let the application connect to the correct 
database on logon based on the user?s information.

Each of these options does have advantages and disadvantages concerning 
scalability, performance and security related issues. While we are still 
evaluating these options, I?m interested in how these options could be 
implemented in a seam application.

Concerning option 1, storing the client ID in the session context and including 
it in all the queries should do the job.

Are there any good strategies concerning option 2 or 3?

I?d like to call upon the community?s experience with these topics, and ask you 
for your opinions on these strategies and their implementation within seam.

Thanks? for your help!
Christian


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