Database Architecture V3.0
Database schema: version 3.0 (see diagram).
The schema has changed a little bit since v2.2. We have added fields to store ports and switches' status, and the last time that the switch/port was monitored. In the systems table, we now have an index to indicate the health of a connecting device. Some other fields have been added to express what user last used the device, the last name of that device, or even to send an email whenever that device get connected to the network.
See also the DB migration script in contrib/migration_2.2_to_3.0.