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Chapter 5 Distributed Systems

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IT Architecture- blueprint that shows how a system, house, vehicle, or product ... IT Infrastructure- actual implementation of the architecture, specifically ... – PowerPoint PPT presentation

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Title: Chapter 5 Distributed Systems


1
Chapter 5 Distributed 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 todays 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

1
2
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 Napsters 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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