Database vs Schema Separation

Hi All,

We're in the process of migrating parts of our system from SQL Server
onto PostgreSQL. In SQL Server we have a db-per-customer, all of which
have the same schema (i.e. table definitions) and we only use the dbo
schema.

I'm looking at options for a similar model into PG; the only real
differences that I can see between customer-per-db and
customer-per-schema is the ability to join between tables in the same
database but different schema. This is not an option for
customer-per-db as once connected into a database, you have to open
another connection to the other one.

I can see there would be connection-pooling advantages for shared-db
models and scalability advantages for per-db (I can move given
customers out onto their own servers more easily etc if I wanted).

Are there any particular gotcha's with either model that I should be
aware of? From what I can see backups, restores and permissions are
all equally configurable per schema as they are per-database.

Many Thanks
Rob

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