Design Activities and Environments Essay

1. Review the definitions of architectural and detailed visualise and the brief descriptions of high-level design activities at the ancestor of the chapter. Which activities are clear architectural? Which are cl untimely detailed? Which cigarette be architectural or detailed? excogitation the support operate architecture and deployment environment and designing the packet architecture are clearly architectural.Designing use case realizations and designing the database are clearly detailed.Designing the system and user interfaces and designing the system security and controls can be architectural or detailed.2. Discuss the evolution of client- master of ceremonies computing from file server to multilayer applications to Web-based applications. What has been the driving enduringness causing this evolution? Where do you concentratek profits computing will be in the next five old age? Ten years?Cheaper computers, and networks, ubiquitous networking, and the desire of companies to step-up the accessibility of their systems to increase the customer base/satisfaction, gain efficiencies from greater inter- and intraorganization coordination, and greater flexibility to stir people, processes, and systems.3. Assume that the deployment environment for a high-volume payment processing system consists of the adjacent DB2 DBMS running under the OS/390 operating system on an IBM S/390 mainframe WebSphere application server running under the Z/OS operating system on an IBM zSeries 900 mainframe CORBA-compliant component-based application software written in Java that will be executed by other internal and external systemsWhat are the key architectural design decisions that must be made for the system? When should the decisions be made and who should overhear them? Outline the subsequent design tasks that should occur after the key architectural design decisions are made. To what extent can the subsequent steps be performed in par all toldel? nigh key architect ural decisions to explore involve the key components and subsystems, where each component will execute and how will all of the pieces interoperate (which requires nailing down how the network, CORBA, and database infrastructure will be configured)?Many of the decisions depend on whether the supporting infrastructure is already in place. If it is, thusly many of the architectural decisions can be delayed until much code has been written and tested. If not, then the required infrastructure and tools will flip to be acquired and configured.Developers will experience to be trained, and architectural design will need to occur early to ensure that the developers dont make any mistakes due to privation of fit with the development or deployment environment. Note that an OO development approach is sour given the nature of the infrastructure and tools4. Develop a network diagram that supports the architectural design decisions in your answer to number 2.Answers will vary. Some importan t points that should be included areFile servers just move the data across the network. They tended to use lots of bandwidth, because the entire file was sent. Also, since the applications that tasteful the data were on all the different workstations, deployment and maintenance of these applications was expensive.Application servers move the applications from the workstations (clients) to the server. This made it easier to maintain a consistent set of applications and to upgrade the applications. This bm was influenced by the appearance of thin clients that had very little storage, but nigh(a) processing capability. However, due to the drastic reduction in storage costs, thin clients have not caught on.Multi-tier networks are where multiple servers and clients work together to give the complete functionality of a system. Some processing will be on the clients. Servers such(prenominal) as database servers and application servers provide additional capability. The driving force behind much of this is the rapid growth and capability of the Internet and languages such as JAVA with protocols such as J2EE. Microsofts .NET also provides capabilities to have distributed systems. Answers for the future will vary.