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Software_Eng1

Chapter11(ArcihtecturalDesign)

QuestionAnswer
The architecture is a high-level presentation of the system that may be used as a focus for discussion by a range of different stakeholders. Stakeholder Communication
Making the system architecture explicit at an early stage in the system development requires some analysis. System Analysis
A system architecture model is a compact, manageable description of how a system is organized and how the components interoperate. Large-scale reuse
Three advantages of explicitly designing and documenting a software architecture are: Stakeholder communication, System analysis, & Large-scale reuse
Architectural models that may be developed may include: Static structural model, dynamic process model, interface model, relationship models, distribution model.
What are three organizational styles (system organization)? Repository model, Client-server model, & the Layered model.
A repository model is... all shared data is in a central database accessible by all sub-systems; suited for applications where data is generated by one and used by another
Some advantages of a Repository Model are... Efficient to share data; data producer doesn't worry about how the data is used; activities are centralized, backup, security, access control, recovery; easy to integrate new tools as long as they conform to the data model.
Some disadvantages of a Repository Model are... Sub-system must agree on the repository data model; evolution is difficult; sub-systems may have different requirements for security, recovery, and backup; difficult to distribute the repository over a number of machines.
The repository is... Passive
A client-server model is... a system model where the system is organized as a set of services and associated servers and clients that access and use the services.
Components of a client-server model are: (1)Servers that offer services, (2)Clients that call on the services, & (3)A network that allows the clients to access the services.
Advantages of a client-server model are: Distributed architecture that uses many processors, and is easy to add components and do integration.
Disadvantage(s) of a client-server model are: They are complex.
Created by: 58800073
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