CIS 210 Systems Analysis and Development Week 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 ... 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... 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... • 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