CIS 210 Systems Analysis and Development Week 8 Part II Designing Distributed and Internet Systems,

Objectives Upon completion of part II you will be able to: –Understand and be able to explain the concepts related to client server architecture, local area networking, distributed databases and middleware –Understand and be able to explain the concepts related to file server and client server environments –Understand and be able to explain the concepts related to distributed systems and their trade-offs –Understand and be able to explain the concepts related to web site management and customer loyalty and trustworthiness –Understand and be able to explain the concepts related to online data, transaction processing, analytical processing and data warehousing

Overview Advances in Technology –GUIs –Networking –Internet Opportunities Competitive Pressures Technologies Being Used Capabilities and Issues

Designing Distributed and Internet Systems The Process of Designing Distributed and Internet Systems –More design issues –More components Deliverables and Outcomes –Description –Data usage –Business processes –Contrasts of alternative IS architectures

Designing Distributed Systems Designing Systems for LANs –Local area network –File servers Manages file operations Limitations –Excessive data movement –The need for a powerful client workstation –Decentralized data control

Designing Distributed Systems Designing Systems for Client/Server Architecture –Client Managing the user interface –Server Database storage Access –Benefits Benefits leverage Reduced response time and network traffic GUI techniques Open systems

Designing Distributed Systems Choosing Between File Server and Client/Server –Client/server Supports distribution of data Supports distribution of processing Advanced Forms of Client/Server Architectures –Functions Data management Data presentation Data analysis –Three tiered client/server –Middleware

Designing Internet Systems Internet Design Fundamentals –Standards drive the Internet BIND HTTP HTML –Separating content and display XML –Future evolution Thin client Wireless –WAP –WML

Designing Internet Systems Site Consistency –Cascading style sheets Simplify site maintenance Ensure consistency –Extensible style language Separating style from content Methods for transforming Methods for formatting –Other consistency issues Page and link titles –Unique titles –Choose words carefully

Designing Internet Systems Design Issues Related to Site Management –Customer loyalty and trustworthiness Design quality Disclosure Comprehensive, correct, current Connected to the Web –Personalization –Customization –Web pages must live forever Bookmarks Links from other sites Search engines Added value –System security Striking a balance

Designing Internet Systems Managing Online Data –Context development Integration depth Organizational breadth –Online transaction processing –Online analytical processing –Data warehousing Subject oriented Integrated Time-variant Non-volatile –Enterprise data warehouse –Data marts

Summary Process of designing distributed and Internet systems Designing systems for LANs Designing systems for client/server architecture Choosing between file/server and client/server architecture Internet design fundamentals Providing site consistency Internet system design issues Managing online data