I need to compile PostgreSQL 8.3.5 on CentOS 4.2. The CentOS already has PostgreSQL 7 installed as part of its default installation. For some reason, I cannot touch the existing PostgreSQL (upgrading, etc) --I really need to use my own compilation of PostgreSQL.

Is it possible to have multiple installations of PostgreSQL (and different version too) on the same server?

At least in theory, I should use a different port...