Cloud Application Architecture

Cloud Application Architecture

Supervisor: Hadi Salimi

[email protected]

Presenter:Abdollah Ebrahimi

[email protected]

Mazandaran University Of Science & Technology

January, 2011

Cloud Application Architecture 2/20

Outline•What is software architectre?•Characteristics of a cloud service

•The problems with traditional applications•What are Cloud Architectures?

•Architectural Considerations of Cloud Applications

• Sample Architectures: Amazon and SalesForce


What is software architectre?A system architecture defines the basic "structure" of the system High-level modules comprising the major functions of the system.Management and distribution of data.The kind and style of system user interface.what platform(s) will the system run on.

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Zero capital expenditure is necessary to get started.

Characteristics of a cloud serviceThe service is accessible via a web browser or web services API.

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Characteristics of a cloud service(cont.)You pay only for what you use as you use it.

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The problems with traditional applicationsDifficult to get as many machines as an application needs.

Difficult to distribute and coordinate a large-scale job on different machines.

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The problems with traditional applications(cont.)Difficult to provision another machine to recover if one machine fails.

Difficult to autoscale up and down based on dynamic workloads.

Difficult to get rid of all those machines when the job is done.

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Designs of software applications that

What are Cloud Architectures?

Use Internet-accessible on-demand services.

The underlying computing infrastructure is used only when it is needed

Scales up or down elastically based on resource needs.

Draw the necessary resources on-demand (like compute servers or storage)

Relinquish the unneeded resources and often dispose themselves after the job is done.

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Examples of cloud Applications

Processing Pipelines Document processing pipelines Image processing pipelines Video transcoding pipelines Indexing Data mining

Batch Processing SystemsBack-office applications (in financial, insurance or retail sectors)Automated Unit Testing and Deployment Testing.Nightly buildsLog analysis

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Examples of cloud Applications(cont.)WebsitesWebsites that “sleep” at night and auto-scale during the day“Seasonal Websites” - websites that only run during the tax season or the holiday season(Christmas) Instant Websites – websites for conferences or events (Super Bowl, sports tournaments)

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Cloud environments differDesign your application appropriately for the particular environment

Amazon? Microsoft Azure? Google APP? SalesForce?

Different mechanisms to implement applications

(EC2), for instance, delivers empty virtual machines(VMs)

Google and Microsoft provide programming frameworks that transparently scale

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Types of cloud applicationsTraditional apps in the cloud

these applications do not support end-user interactionbut rather work on a set of data and experience transitory loads (such as once-a-month reporting or a onetime processing request).

These applications follow an enterprise architecture model and are designed to meet roughly stable demand.

Synchronous cloud applicationsLarge numbers of users may hit the system in a short durationProvide enough Web servers to handle total traffic.provide enough middleware to manage demand. Provide a data tier that scales. Asynchronous cloud applications

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Architectural Considerations of Cloud Applications

ScaleStart SimpleSplit application functions and couple loosely

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Architectural Considerations of Cloud Applications(cont.)Scale

Network communication

Consider the cluster

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Architectural Considerations of Cloud Applications(Cont.)

FailBuild-in resiliency and fault toleranceDistribute the impact of failureGet back up quicklyData considerationsTest your “doomsday” scenarioBe aware of the real cost of failure

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Considerations to provide a data tier that easily scales

plan your data approach to minimize trips to the database and prevent subsequent calls to the database.set up a caching mechanism between the database itself and the middle tier. consider more sophisticated database uses. You can use replication technology to run multiple copies of a database and keep databases consistent. minimize use of relational database technology and create a file-based data storage mechanism.

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Managing resources in cloudFramework cloud systems (e.g., Microsoft Azure and Google Apps) take care of these tasks for you. They feature a monitoring mechanism that views system load and spawns new instances as required. An infrastructure-based system like Amazon provides Web service calls that can be used to start or stop individual instances.

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Sample Architecture: Amazon

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Sample Architecture: SalesForece.com

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Reese, G. (2009). Cloud application architectures: building applications and infrastructure in the cloud, O'Reilly Media, Inc.

http://searchcloudcomputing.techtarget.com/news/1355051/Choosing-an-application-architecture-for-the-cloud, Bernard Golden,Choosing an application architecture for the cloud, 2009.

Varia, J. (2008). "Cloud architectures." White Paper of Amazon, jineshvaria. s3. amazonaws. com/public/cloudarchitectures-varia. pdf.

http://www.rpath.com/corp/images/stories/white_papers/WP_ArchitectureForCloudComputing.pdf,Application Architecture for Cloud Computing.

References

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Questions?

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Documents

Cloud Application Architecture