Data estimation is not given and also what database is chosen?
In the lesson, we provided different scenarios for which different databases could be suited. Well according to the case in the lesson CASANDRA is chosen.
As is evident from the capacity estimation, the amount of data of restaurants, menu descriptions, user data, Dasher data, etc., is going to be huge. Hence, a NoSQL/ columnar database like Cassandra could be used.
Moreover, data estimation is linked to the capacity estimation of the previous lesson.