Chapter 7
description
Transcript of Chapter 7
McGraw-Hill/Irwin Copyright © 2013 by The McGraw-Hill Companies, Inc. All rights reserved.
Chapter 7Infrastructure, Cloud Computing, Metrics, and Business Continuity
Planning: Building and Sustaining the Dynamic Enterprise
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STUDENT LEARNING OUTCOMES
1. Describe how an SoA can be used as a philosophical approach to help the organization of the future.
2. Define and describe the various hardware and software infrastructure considerations.
3. Describe cloud computing, its various implementations, and its advantages.
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STUDENT LEARNING OUTCOMES
4. Compare and contrast commonly used metrics for assessing the success of IT systems.
5. Describe business continuity planning (BCP) and its phases.
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MONEY WILL ALWAYS BE MONEY
The use of The use of paper money is paper money is on the decline; on the decline;
the use of the use of electronic electronic
money has money has more than more than
doubled in the doubled in the past 10 years.past 10 years.
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Questions1. Do you use an electronic form of
money such as Google wallet or a smartphone app? If so, which one?
2. Which do you think is easier—the counterfeiting of paper money or the counterfeiting of electronic money? Why?
3. Why does the government continue to mint pennies when the process costs more than a penny?
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INTRODUCTION: SoA
Service-oriented architecture (SoA) - perspective that focuses on the development, use, and reuse of small self-contained blocks of code (called services) to meet all application software needs
Software code is not developed solely for a single application
Rather services are built that can be reused
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INTRODUCTION: SoA
Can extend SoA to the entire organization to be Lean and agile using resources in the best
way Proactive in addressing changes in the market Quick to respond and adapt to advances in
technology Transformational in its processes, structure
and HR initiatives to match a changing and dynamic workforce
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INTRODUCTION: SoA
SoA focused specifically on IT Customers End users Software development Information needs Hardware requirements
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INTRODUCTION: SoA
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INTRODUCTION: SoA
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INTRODUCTION: SoA
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INTRODUCTION: SoA
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HARDWARE AND SOFTWARE
INFRASTRUCTURE
Infrastructure – the structure beneath a structure
IT infrastructure is the implementation of your organization’s architecture
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ERP Revisited
From Chapter 2, Enterprise resource planning (ERP) system – collection of integrated software for business management, accounting, finance, supply chain management, inventory management, customer relationship management, e-collaboration, etc
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ERP and SoA
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Supporting Network Infrastructures
Computer network – fundamental underlying infrastructure for any IT environment Distributed Client/server Tiered
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Distributed Network Infrastructure
Distributed – distributing the information and processing power of IT systems via a network
First true network infrastructure Processing activity is allocated to the
location(s) where it can most efficiently be done
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Distributed Network Infrastructure
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Client/Server Infrastructure
Client/server infrastructure (network) one or more computers that are servers provide services to other computers, called
clients Servers and clients work together to
optimize processing, information storage, etc
When you surf the Web, the underlying network infrastructure is client/server
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Client/Server Infrastructure
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Tiered Infrastructure
Tiered (layer) – the IT system is partitioned into tiers (layers) where each tier performs a specific type of functionality 1-tier – single machine 2-tier – basic client/server relationship 3-tier – client, application server, data or
database server N-tier – scalable 3-tier structure with more
servers
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Tiered Infrastructure
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CLOUD COMPUTING
Hottest term in technology today Cloud computing – model in which
any and all IT resources are delivered as a set of services via the Internet Application software Processing power Data storage Backup facilities Development tools Literally everything
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CLOUD COMPUTING
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Cloud Computing Goals
Pay for only what you need and use
Real-time scalability (up or down)
Align computing costs with level of business activity
Reduce fixed costs in IT infrastructure
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Many Implementations of the Cloud
Software-as-a-service (SaaS) Platform-as-a-service (PaaS) Infrastructure-as-a-service (IaaS)
Cloud demo video
Demo video of IaaS
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Software-As-A-Service
SaaS - delivery model for software in which you pay for software on a pay-per-use basis instead of buying the software outright.
Most well known Supports multi-tenancy
multiple people can simultaneously use a single instance of a piece of software.
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Platform-As-A-Service
PaaS – delivery model for software identical to SaaS with the additional features of1. Access to software development tools to
alter the way in which the software works by adding new modules (services) and/or making modifications to existing modules
2. The ability to customize data entry forms, screens, reports, and the like
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Infrastructure-As-A-Service
IaaS - model in which you acquire all your technology needs—storage hardware and data, network equipment, application software, operating system software, data backups, CPU processing capabilities, anti-you-name-it software—in the cloud.
All you need – smartphone/tablet and peripheral devices (e.g., printer)
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Public and Private Clouds
Public cloud – comprises cloud services that exist on the Internet offered to anyone and any business. Amazon Web Services (AWS) Windows Azure Rackspace Cloud Google Cloud Connect ElasticHosts
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Public and Private Clouds
Private cloud cloud computing services established and
hosted by an organization on its internal network available only to employees and
departments within that organization. All benefits of cloud computing,
except held private within an organization
Of course does COST more
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Advantages of the Cloud
Lower capital expenditures Lower barriers to entry Immediate access to a
broad range of application software
Real-time scalability
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IT SUCCESS METRICS
To justify costs of technology, you need to measure its success
Metrics are also called benchmarks, baseline values a system seeks to attain.
Benchmarking – process of continuously measuring system results and comparing them to benchmarks
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Efficiency & Effectiveness Metrics
Efficiency – doing something right In the least time At the lowest cost With the fewest errors
Effectiveness – doing the right things Getting customers to buy when they visit
your site Answering the right question with the right
answer the first time
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Efficiency & Effectiveness Metrics
Bottom-line initiatives typically focus on efficiency, while top-line initiatives Bottom-line initiatives typically focus on efficiency, while top-line initiatives tend to focus on effectiveness.tend to focus on effectiveness.
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Types of IT Success Metrics
Infrastructure-centric metrics Web-centric metrics Call center metrics
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Infrastructure-Centric Metrics
Measure of efficiency, speed, capacity
Throughput – amount of information that can pass through a system in a given amount of time
Transaction speed – speed at which a system can process a transaction
System availability – the average amount of time a system is down or unavailable
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Infrastructure-Centric Metrics
Accuracy – measured inversely as error rate, or the number of errors per thousand/million that a system generates
Response time – average time to respond to a user-generated event like a mouse click
Scalability – conceptual metric related to how well a system can be adapted to increased demands
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Web-Centric Metrics
Measure success of your e-business initiatives
Unique visitors – # of unique visitors to a site
Total hits – number of visits to a site Page exposures – average page
exposures to an individual visitor Conversion rate - % of potential
customers who visit and actually buy
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Web-Centric Metrics
Click-through - # of people who click on an ad and are taken to the sponsor’s site
Cost-per-thousand (CPM) – cost of ad per thousand customer views or clicks
Abandoned registrations - # who start to register at your site and then abandon the process
Abandoned shopping carts - # who create a shopping cart and then abandon it
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Call Center Metrics
Abandon rate - % number of callers who hang up while waiting for their call to be answered
Average speed to answer (ASA) – average time, usually in seconds, that it takes for a call to be answered by an actual person
Time service factor (TSF) - % of calls answered within a specific time frame, such as 30 or 90 seconds
First call resolution (FCR) - % of calls that can be resolved without having to call back
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BUSINESS CONTINUITY PLANNING
Business continuity planning (BCP) – rigorous and well-informed organizational methodology for developing a business continuity plan, a step-by-step guideline defining how the organization will recover from a disaster or extended disruption
BCP is very necessary today given terror threats, increased climate volatility, etc
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BUSINESS CONTINUITY PLANNING METHODOLOGY
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BCP METHODOLOGY
1. Organizational strategic plan2. Analysis3. Design4. Implementation5. Testing6. Maintenance
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Organizational Strategic Plan
It all starts here The strategic plan defines what
is and what is not important You must have a business
continuity plan for what is important
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Analysis
Impact analysis – risk assessment, evaluating IT assets, their importance, and susceptibility to threat
Threat analysis – document all possible major threats to organizational assets
Impact scenario analysis – build worst-case scenario for each threat
Requirement recovery document – identifies critical assets, threats to them, and worst-case scenarios
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Design
Build disaster recovery plan, detailed plan for recovering from a disaster. May include Collocation facility – rented space and
telecommunications equipment Hot site – fully equipped facility where
your company can move to Cold site – facility where your company
can move to but has no computer equipment
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Design
Disaster recovery plan should include a Disaster recovery plan should include a disaster recovery cost curvedisaster recovery cost curve, which , which charts the cost of unavailable information/technology compared to the cost to charts the cost of unavailable information/technology compared to the cost to
recover from a disaster over time.recover from a disaster over time.
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Implementation
Engage any businesses that will provide collocation facilities, hot sites, and cold sites
Implement procedures for recovering from a disaster
Train employees Evaluate each IT system to ensure that it
is configured optimally for recovering from a disaster
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Testing
As opposed to traditional SDLC, testing in BCP methodology occurs after implementation
Simulate disaster scenarios Have employees execute disaster
recovery plans Evaluate success and refine as
necessary
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Maintenance
Perform testing annually, at a minimum
Change business continuity plan as organizational strategic plan changes
Evaluate and react to new threats No “system” is ever complete