@JennyD Thank you very much. CAP says about distributed systems. But, how can you have it distributed actually? I mean that database is something which stores consistent data. If you make reserve tickets for a plane then it must be possible to allocate the same seat for two people. There must be a single source of truth, a single database. You may one database managing one half of the plane and another managing another half and distribute the database this way.
But, this is not what work balancing is about. Work balancing says that you have two independent planes and we send first client to one database and another to another database. But they will be in conflict soon.