You can configure OpenStack Compute to use any
        SQLAlchemy-compatible database. The database name is
        nova. The nova-conductor service is the
        only service that writes to the database. The other Compute
        services access the database through the nova-conductor service.
To ensure that the database schema is current, run the following command:
# nova-manage db sync
If nova-conductor
        is not used, entries to the database are mostly written by the
        nova-scheduler
        service, although all services must be able to update
        entries in the database.
In either case, use the configuration option settings documented in Table 2.24, “Description of configuration options for db” to configure the connection string for the nova database.

