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MEIE881
Architecture and Infrastructure
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Architecture & Infrastructure Define: client/server, server, thick client, thin client,
mainframe, legacy system, peer-to-peerDistinguish architecture from infrastructureDiscuss the relationship between strategy, business
requirements, architecture, and infrastructureDiscuss the applicability of evaluation criteria to
architecture and infrastructureAnalyze infrastructure and architecture needs across
hardware, software, data and networksDescribe the purpose and steps in Business Continuity
PlanningDefine and describe SOA
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Who needs IT Architecture and Infrastructure?
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Strategy, Requirements, Architecture & Infrastructure
Strategy
Business Requirements
Architecture
Infrastructure
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Information ArchitectureHigh level map of info requirements; blueprintCentralized:
data communications
Decentralized: focus on organizational function
Translates strategy into infrastructureHard to define: needs change
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Information Infrastructure
Physical facilities, services, management supporting computing resources hardware Software networks & communications data personnel
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Managerial Considerations
Existing ArchitectureCurrent & Future Requirements
Financial IssuesTechnical Issues
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Evaluation Criteria: Applicability
Criteria Architecture Infrastructure
Strategic timeframe
Very Not
Technologicaladvances
Very Somewhat
Growthrequirements
Very Very
AssessingFinancial Issues
Somewhat Very
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Evaluation Criteria: Applicability (cont)
Criteria (Technical)
Architecture Infrastructure
Standardization Very Very
Maintainability Very Very
Staff Experience Very Very
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Meta Group Guidelines for Adaptable IT A&I
Plan modular (independent and loosely coupled) vs. monolithic
Have clear boundaries between infrastructure components
With network architecture, provide access to all users when it makes sense to do so
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Architecture Definitions Mainframe- Computing environment in
which a large central computer handles all system functionality
Peer-to-peer- Architecture that allows networked computers to share resources without a central server playing a dominant role
Client/Server ArchitectureWireless (Mobile)- Computing environment
maintaining a data connection from a remote network using a wireless technology
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Architecture Definitions - Client/serverClient - PC or workstation attached to a network
which is used to access shared network resourcesServer - machine that provides clients with
services (i.e., sharing databases, software)Thick client - full function stand-alone computer
that is used either exclusively or occasionally as a client in a client/server architecture
Thin client - computer hardware designed to be used only as a client in a client/server architecture (Network PCs)
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Service Oriented Architecture (SOA)
SOA - architectural design pattern that concerns itself with defining loosely-coupled relationships between producers and consumers.
Guiding Principles Reuse, granularity, modularity, loosely
coupled, and interoperability Compliance to standards (both common and
industry-specific) Services identification and categorization,
provisioning and delivery, and monitoring and tracking
http://br.youtube.com/watch?v=sbd_1G8Kqjs
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Before and After SOA
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Top 10 Mistakes When Implementing SOA ZDNet News, 1/17/08, Callahan
Taking a shotgun approach (can’t afford indiscriminate use) Failing to involve business analysts (must consider business needs) Spending more time on SOA products than SOA planning Tackling the largest projects first (start with low-risk, smaller
projects) Forgetting that SOA is a business problem Treating identity as an afterthought Buying new products when exiting investments suffice (can usually
use existing hardware and software with SOA products) Misunderstanding company key players (know who ‘owns’ the
data) Expecting the SOA project to spread quickly (moving forward
incrementally and carefully ensures the most reuse) Lacking necessary elements (must have in-house resources or
expertise to implement) http://br.youtube.com/watch?v=0CbjUNzBV6I
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Video – Vancouver International
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Video Summary
Problem – Too Many NetworksVision – Superior AirportImplementation
Business Strategy – 2010 Olympics
Architecture – Wireless
Infrastructure – Cisco
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Business Continuity PlanningApproved set of preparations and
sufficient procedures for responding to a variety of disaster events
Stages Pre-planning Planning Post-planning
Internal and external threats