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Chapter 5 Distributed Systems

Chapter 5 Distributed Systems. Jeff McCrea. Overview. About Distribute Systems (What, When, & How) Six Types of Distributed Systems The IT Infrastructure CLJ CTQ. Distributed Systems. Architecture of Choice for today’s Business Key Definitions:

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Chapter 5 Distributed Systems

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  1. Chapter 5Distributed Systems Jeff McCrea

  2. Overview • About Distribute Systems (What, When, & How) • Six Types of Distributed Systems • The IT Infrastructure • CLJ • CTQ

  3. Distributed Systems • Architecture of Choice for today’s Business • Key Definitions: IT Architecture-blueprint that shows how a system, house, vehicle, or product will look, and how its parts interrelate. IT Infrastructure- actual implementation of the architecture, specifically processes, software, databases, etc.

  4. Distributed Systems- (What) • Four Main Attributes Where is the process done? -Distributed Processing How are the processes and other devices interconnected? -Connectivity Where is the information stored? -Distributed Databases What rules and standards are used? -System-wide rules

  5. Distributed Systems (When) • Three Business Questions to Ask: -Are the operations interdependent? -Are the businesses really homogeneous? -Does the corporate culture support decentralization?

  6. Distributed Systems- (How) • Two Frameworks for Implementation: -Organizational- six levels of an organization: enterprise, region/country, site, department/process, work group/team, individuals. -Technical- SUMURU architecture

  7. Six Types of Distributed Systems • Host-Based Hierarchy- • Large host above midrange computers and terminals. • Favored by mainframe vendors because of master/slave relationship. • Data can be stored in various places.

  8. Six Types (cont.) • Decentralized Stand-Alone System- - Not distributed, but decentralized. - Separate departmental systems that communicate via terminals. • Many different unconnected systems. • ERP systems are replacing them.

  9. Six Types (cont.) • Peer-to-Peer LAN-based System- • Use LAN (local area network) for desktop access. • LAN provides links between PCs, printers, and other network gateways. • No Hierarchy.

  10. Six Types (cont.) • Hybrid Enterprise-wide System- • Mix of first three system forms linked with networks. • Networks- MAN, WAN, and Internet. • Allows for automation of business processes that span several functions.

  11. Six Types (cont.) • Client-Server System- • Splits workload between client and server. • Network is dividing line between client-side and server-side. • Broken into: distributed presentation, remote presentation, distributed application function, remote data management, and distributed databases.

  12. Six Types (cont.) • Internet-centric Computing Systems- • Internet is heart of distribution. • Three types: network-centric, server-based computing, and peer-to-peer computing.

  13. IT Infrastructure • Four Types of IT Investments- 1. Strategic Investment • 2. Informational Investment • 3. Transactional Investment • 4. Infrastructure Investment 2 1 3 4

  14. IT Infrastructure • Three Views of Infrastructure: • 1. Economies of Scale (Utility) • -necessary service, benefits through cost savings from econ. of scale. • 2. Support for Business Programs (Dependent) • -ties to investments, infrastructure is business expense, value measured through short-term business benefits. • 3. Flexibility to Meet Changes in the Marketplace (Enabling) • -continuous modifications to infrastructure to align to business strategy.

  15. CLJ • “Damn the Lawsuits! Investing in P2P Forges on” by Robert La Franco • Continuous push of P2P technology. • P2P can better the business, not just trade music. • P2P allows co-workers, partners, and clients to distribute data among themselves. • “Distributed computing is a pervasive and irreplaceable transformation of the Internet.” • Use existing technology and Internet to better communication. • Use P2P to connect computing devices of all kinds. • Groove Network- Linking thousands of corporate seats with virtual networks, not consumer applications. • Distribution on the Internet backbone, rather than a central server is going to be the technology that finally allows media companies to establish workable business models on the web.

  16. CTQs • Can P2P take off into the future for more than music? • Will Napster’s Failure hurt the technology? • If successful, how long until all businesses utilize P2P technology? • What are other uses for P2P technology? • Will current networks disappear for Internet networks? • Are there any security issues with P2P technology? • How does P2P fit into the globalization of the economy?

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