ITEC 3030 Lecture Notes - Lecture 1: Poisson Distribution, Graphical Model, Web Service
Document Summary
A simplified abstract for the architectural styles, abstraction means the suppressing the unnecessary details. Audience of the model must be aware of simplification. In physics for example, the mass itself (m) models a property of an object, instead of mass there could be different concept, so the mass is used to describe p = m x u. The mass in this example, describes the momentum on billions of atoms instead of referring to each atom one by one. In quantitative model, statement is made about measurable properties of an architecture such as performance, resilience and capacity. Example: utilization = transaction throughput x busy time per transaction. Example: service request for a web service follows a poisson distribution, with specific parameters, how many requests from the clients. Need to know poisson, he talked about arrival of the request from the client, the grid . Probability of mass function, he asking: what is the value of arrival