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ch06 - Chapter 6 Architecture and Infrastructure Managing...

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1 Chapter 6 Architecture and Infrastructure Managing and Using Information Systems: A Strategic Approach, 2 nd ed.
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2 People’s Bank’s New 4-Tier Architecture In 1998, PB decided it needed an architecture to: Tie together all its service delivery platforms back to a common set of business rules Create seamless links supporting real-time data transfer to its external partners Its new 4-tier architecture (next slide), implemented in stages, was up and running by Oct. 2000
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Figure 6.1 Architecture/Infrastructure of People’s Bank The tier 3 servers and legacy systems communicate through message broker hub. Unisys mainframe runs core banking systems, while IBM S/390 runs general ledger, payroll and HR systems. Legacy Systems In the third tier, transaction processing control is built around IBM WebSphere Application Server, Enterprise Edition. The architecture is integrated with external data sources via TCP/IP sockets Servers In the second tier, IBM WebSphere Application Server, Advanced Edition, serves as the Web application server. Web and Application The first (client) tier is composed of web browsers serving as the interface for customers and employees Client About Infrastructure Infrastructure Architecture People’s Bank Customers Call Center Repre- sentatives Tellers at Branches Tier 2 Web Servers 3 rd Party Data Sources Tier 3 Web Servers IBM S/390 Client Server Applications Unisys Mainframe
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4 FROM VISION TO IMPLEMENTATION IBM s/390 Parallel Enterprise Server
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5 Architecture in construction IS architecture is like the architectural plans for a building, unchangeable in some areas, but subject to interpretation in others. Architectural plans are used by builders to select materials and use construction techniques based on past experience and industry standards.
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6 Translating Architecture into Infrastructure IT architecture provides a blueprint, translating business strategy into a plan for IS (see Figure 6.2). An IT infrastructure consists of physical components, chosen and assembled in a manner that best suits the plan… …and therefore best enables the overarching business strategy.
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7 Figure 6.2 Characteristics of popular architectures Mainframe Client/server Peer-to-Peer Wireless
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