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Patterns are a widely used concept in computer science to describe good solutions to reoccurring problems in an abstract form. Such conceptual solutions can then be applied in concrete use cases regardless of used technologies, such as software, middleware, or programming languages. As cloud computing is a new and developing field of commerce, new products and technologies are constantly made available to cloud users. In this scope, market dynamics often lead to confusing service descriptions. While advertising the individual properties of a specific cloud service may help in positioning it on the competitive market of cloud computing, they obfuscate the common underlying concepts. We therefore employ a pattern-like description language to describe cloud service models and cloud types in an abstract form to categorize the offerings of cloud providers. Further, we give reoccurring architectural patterns on how to design, build, and manage applications that use these cloud services. The abstracted form of these architectural patterns make them applicable to challenges that developers of cloud application face today, independent of the actual technologies and cloud services that they are using.

Cloud Types

Cloud Service Models

Cloud Offerings

Low-available Compute Node	High-available Compute Node	Elastic Infrastructure	Strict Consistency
Eventual Consistency	Relational Data Store	Blob Storage	Block Storage
NoSQL Storage	Message-oriented Middleware	Reliable Messaging	At-least-once
Exactly-once

Cloud Application Architectures

Composite Application	Loose Coupling	Stateless Component	Idempotent Component
Map-Reduce	Elastic Component	Elastic Load Balancer	Elastic Queue
Watchdog	Update Transition	Single Instance Component	Multiple Instance Component
Single Configurable Instance Component

News on Twitter

New paper on the use of cloud patterns (http://t.co/dsh3wHlw) for development and management of cloud applications: http://t.co/Kq4J6qaG
Join us at ChiliPLoP http://t.co/t5LPlr8H to discuss and review the cloud patterns. See you in New Mexico! :-)
We now have a pattern authoring toolkit for all you cloud pattern writers. Looking forward to your contributions! :-) http://t.co/FqpKUR63
RT @ghohpe: Cloud computing patterns. I like the icons :-) http://t.co/EQBLdf4e
@ghohpe thanks! I will revise them together with @metayoda during ChiliPLoP. Some people keep seeing iphones in some of them... ;-) in reply to ghohpe

@ccpatterns

Caveat

Describing good solutions to reoccurring problems as patterns is a common practice in research and industry alike. While the development of cloud applications faces many new challenges, existing patterns can be applied directly or can be transferred to the area of cloud computing with adjustments. This catalog therefore contains existing patterns from the areas of standalone applications, grid applications, and message-based applications. These patterns where transferred to the area of cloud computing focusing specifically on this environment. We do not claim to have invented these patterns. References are given to the original sources where applicable.

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Cloud Computing Patterns