Post on 01-Nov-2014
description
SOA and Cloud Computing
David Choudavid.chou@microsoft.com
blogs.msdn.com/dachou
State of SOA
>Perceptions• SOA = IT centralization/standardization• “SOA is dead” (Anne Thomas Manes, Burton Group; January
2009)
• Cloud computing will replace SOA
>Reality• SOA does not solve all enterprise IT issues• SOA is complex, and difficult• Core value of SOA is agility, but needs vary• SOA demands change, but organizational
resistance is often the biggest impediment• Need to focus on architecture, not technology
SOA Manifesto
Service orientation is a paradigm that frames what you do. Service-oriented architecture (SOA) is a type of architecture
that results from applying service orientation.
We have been applying service orientation to help organizations consistently deliver sustainable business value, with increased agility
and cost effectiveness, in line with changing business needs.
Through our work we have come to prioritize:
Business value over technical strategy Strategic goals over project-specific benefits
Intrinsic interoperability over custom integration Shared services over specific-purpose implementations
Flexibility over optimization Evolutionary refinement over pursuit of initial perfection
That is, while we value the items on the right, we value the items on the left more.
http://www.soa-manifesto.org/
SOA Principles
>Reuse
>Granularity / Modularity / Componentization
>Loose Coupling / Contractual Design
>Interoperability / Standards Compliance
>Abstraction / Encapsulation
>Composability
>Discoverability
>Manageability
SOA Principles, Redux (for “Small SOA”)
>Reuse
>Granularity / Modularity / Componentization
>Loose Coupling / Contractual Design
>Interoperability / Standards Compliance
>Abstraction / Encapsulation
>Composability
>Discoverability
>Manageability
SOA, Meet Cloud Computing
SO-Architecture> A different approach to
organize enterprise IT resources
> Governance> Management> Strategic framework
and planning> People and process
IT-as-a-Service> A different model to
leverage computing resources
> Service design> Higher-level abstraction> Tactical and incremental
implementation> Data and technology
Extending Enterprise SOA to the Cloud
> Resources beyond enterprise boundaries (networks without borders)
> Cloud as a collection of capabilities/services to leverage (“Intercloud” – an interconnected global “cloud of clouds”)
> Loose-coupling everywhere (in service contracts, data relationships, process dependencies, identity, communication models, performance expectations, change management processes, etc.)
> More trust needed (lower security requirements, virtual & shared infrastructure, multi-tenancy, Internet transit, etc.)
> Different fault zones/domains, criticality tiers (one big monolithic SOA vs. federated distributed SOA)
> New development efforts (instead of moving legacy applications into someone else’s data center)
Web as a Platform“Intercloud”
Emerging Trends
>De-perimeterization>Democratization of industries>Dynamic business models>Relationship networking core competencies>Shifting process centers of gravity>Plug-and-play IT architectures>Model-driven development
david.chou@microsoft.comblogs.msdn.com/dachou
Thank you
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