#databases.yml:

all:
  session_db:
    class:          sfPDODatabase
    param:
      dsn:          mysql:host=my_host_ip;dbname=session_db
      username:     sessionuser
      password:     password



#factories.yml:
all:
  storage:
    class: sfPDOSessionStorage
    param:
      database:                session_db
      db_table:                user_session
      session_name:            my_site_name