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Chapter 3: IT Architecture - Coggle Diagram
Chapter 3: IT Architecture
Architecture as DNA
Imprints traits of IT systems
Largely irreversible
Influences how they can and cannot evolve
Lurks in blind spot of non IT managers-a technical decision
IT architecture is a choice among tradeoffs
Corporate IT Architecture : The Big Picture
how they fit together
three classes of IT assets
3.Apps
2.Data
1.IT infrastructure
Enterprise Architecture: How a firm's
corporate IT apps, infrastructure and data are
organized
Layer 1: Infrastructure architecture
Firmwide digital plumbing used by all line
functions and apps
IT hardware : PC, tablets , servers ,storage
devices
Firmwide arrangement that are relatively
stable, generic commodity and rarely a
competitive differentiator
Must be reliable but economical
Key choice to level of centralization
Centralized
Costlier to build
Cheaper to run
Decentralized
Cheaper to build
Costlier to run
Layer 2 : App Architecture
choosing where to locate the three
pieces(interaction, app logic ,data storage) between centralized 'server' and user devices
has irreversible operational and strategic
consequences
three building blocks
Interaction
App logic
Data storage
Three arrangement
1.Cloud architecture
all heavy lifting is done on the server side via
the ' cloud '
Clients can be feeble & cheap
Centralizes everything
Easy maintenance
Low upfront costs
2.Client-server architecture
centralizes only data; clients do heavy things
newer cloud-inspired
-Service-oriented architectures
-Micro-services
3.Peer-to-peer architecture
No central server
every client performs all app functions
infinite , dirt cheap scalability
zero control over user devices
Layer 3: Data Architecture
integrated firmwide data is the foundation for
automation and analytics
where is your firm's data stored
Non -IT managers must decide
what data should be centralized firmwide for executing core business process or for analytics
what data must be shared across your
markets
Widespread problem
Proliferation of duplicated
Inconsistent data
Causes
1.Fragmented across app
Solution
Data warehouses
2.Geographic dispersion
Solutions
Replication
Partitioning
IT Architecture
A blueprint of IT assets in your portfolio
describing what they do and how they interact