MSDN - Converting an existing ASP.NET application to Windows Azure

Converting an existing ASP.NET application to Windows AzureMaarten Balliauw – RealDolmenBlog: http://blog.maartenballiauw.beTwitter: @maartenballiauw

Whoam I?Maarten BalliauwAntwerp, Belgiumwww.realdolmen.comFocus on webASP.NET, ASP.NET MVC, PHP, Azure, VSTS, …MVP ASP.NEThttp://blog.maartenballiauw.behttp://twitter.com/maartenballiauw

AgendaWindows Azure?An existing application…Migration pathsConsiderationsQ&A

What’s in the cloud?Windows Azure

The Windows Azure PlatformWindows AzureSQL AzureWindows Azure platform AppFabricDeveloper toolsMicrosoft Codename “Dallas”

Windows AzureFlexible application hostingLights-out service managementProvide code & service model, hit ENTERStorage at massive scaleComputeStorageManagement

SQL AzureRelational database as a serviceHighly available, automatically maintainedExtension of the SQL Server Data PlatformBusiness AnalyticsReportingData SyncDatabase

SQL AzureRelational database, provided as a serviceHighly symmetrical development and tooling experience (use TDS protocol and T-SQL)Highly scaled out, on commodity hardwareBuilt on the SQL Server technology foundationBeyond “hosted database”High availability, DB provisioning, and DB management are provided by the servicePay for what you use

Windows Azure AppFabricSecure connections between servicesAcross organizational boundariesClaims-based access controlServiceBusAccessControl

Windows Azure AppFabric - Service BusSecurely connect applicationsOver the internetAcross any network topologyAcross organizational boundariesPrimary application patternsEventing: Notify applications and/or devicesService Remoting: Securely project on-premises services out to the cloudTunneling: App-to-app communication with NAT/Firewall traversal

Windows Azure AppFabric - Access ControlProvides outsourcing of claims-based access control for REST web servicesKey capabilities:Usable from any platformLow friction way to onboard new clientsIntegrates with AD FS v2Supports WRAP / SWTEnables simple delegationUsed today by Service Bus and “Dallas”

Microsoft Codename “Dallas”Content brokerage and discovery platform Available as a CTP at commercial launchMicrosoft Codename “Dallas”Information Services

Introducing “Dallas”Content Brokerage and Discovery platform Discover, Explore, and Use any type of content (blobs, structured, real-time web services)Tap into an ecosystem of global content providersProcess & analyze dataEmpowers developers of all sizesBuilt on Windows Azure and SQL Azure

MSDN - Converting an existing ASP.NET application to Windows Azure

Blob ContainerEntitiesAccountTablehttp://<account>.blob.core.windows.net/<container>http://<account>.table.core.windows.net/<table>MessagesQueueWindows Azure Storage Conceptshttp://<account>.queue.core.windows.net/<queue>

Blob StorageStore sets of binary dataText files, images, …Highly AvailableAutomatically scales to multiple servers and locationsDurableData is replicated at least 3 times

Table StorageStore sets of structured dataNot bound to schema!Billions of entities (rows) and TBs of dataAutomatically scales to thousands of servers as traffic growsHighly AvailableCan always access your dataDurableData is replicated at least 3 times

Table Storage CapabilitiesWhat tables don’t doWhat tables can doNot relationalNo Referential IntegrityNo JoinsLimited QueriesNo Group byNo AggregationsTransactions (limited)Very ScalableFlexibleDurableStore LOTS of stuff CheapIf these are important to you, use SQL Azure

Queue ServiceStore a queue of messagesFIFOCan be used by multiple worker roles

Windows Azure SummaryMany is better than oneLet Microsoft worry about thisLoose couplingWeb Role and Worker RoleStorage choiceAzure Storage: Simple stores scaleTable, Blob, QueueSQL Azure: Full RDBMSStored Procedures, Schema, Transactions, Views etc

Let’s have a look at…an existing application…

Existing ASP.NET applicationASP.NET Webforms“Repository pattern”Entity frameworkDatabaseFile storage on serverBuilt with no need for scale

The shortest way to the cloudMigration paths

First things first…Tools:Windows Azure SDKWindows Azure Visual Studio Toolswww.microsoft.com/webNew solution:Blank “cloud service”Add existing projectsPromote to “web role”

Migration paths: hosting & file storageWindows Azure Web RoleHosting the web applicationWindows Azure Blob StorageHosting “user uploaded content”Option 1: HttpHandler+ Abstraction and migration freedom- Traffic & related costsOption 2: public blob container + Azure CDN+ Traffic & related costs+ Pretty download URL+ Fast! Nearby!- Abstraction and migration freedom

Migration paths: dataOption 1: SQL AzureEasiest migration path for dataMore powerful RDBMSSync Framework Power Pack: http://bit.ly/5hTtSYSQL Azure Migration Wizard: http://sqlazuremw.codeplex.com/Option 2: Table storageWill be cheaper in operating costs for small applicationsWill probably require some rework

Think before you go cloudy…Considerations

HostingMigrationWill be an easy migrationRemember to use the providers from the SDKKeep the “multiple roles” idea in mind!Considerations to makeStore all content in the application?Requires a re-deployment quite often…Better: store more dynamic content on blob storageBackground processingTry moving heavy CPU tasks to worker role where appropriateOne web role?Will be cheaper…But will have your application down during upgrade…Better: always > 1 web role (at least 2)

DatabaseWorking with EF / NHibernate / (insert ORM here)?SQL Azure wil be easiest path, but is more expensiveTable storage…Will get you frustrated if your application design is bad!(like mine in the demo)Use simple data structures for table storageMap these to whatever you want in your application

ArchitectureQuote: “Some architectures will require rework” All of them will require rework to do it right…Current application architecture not suited for large scale!I can go for multiple web rolesBut not for unlimited web roles…Think in “multiple roles”Web rolesBackedbyworkerroleswhereneededArchitecture will be one of the challenges

Typical ArchitectureService UnavailableVIPWorker RoleWeb RoleWindows Azure Storage (Blob, Table, Queue)

Web + Worker Role Service ModelWorker RoleService Still AvailableWorker RoleWeb RoleVIPWorker RoleWeb RoleWorker RoleWorker RoleWindows Azure Storage (Blob, Table, Queue)

Windows Azure - Coming soon…Programming modelAdministrator privileges in the VMDeployment of pre-configured VM imagesStill obtain the benefits of the WA service modelStorageUser-selectable geo-locations for replicasSecondary indices on tablesService managementRemote terminal server access to VMs

ResourcesWindows Azurehttp://www.azure.comSteve Marxhttp://blog.smarx.com/Clemens Vastershttp://vasters.com/clemensv/Simon Guesthttp://simonguest.com/blogs/smguestPDChttp://microsoftpdc.comMy bloghttp://blog.maartenballiauw.be/category/Azure.aspxRealDolmen blogs is running on Azure!http://www.realdolmenblogs.com

AZUG.BE – Azure User Group BelgiumFocus on the Azure Services PlatformCommunity-drivenFocus on architectureAnd developmentAnd the business value of Azurewww.azug.be

Questions, possibly Answers…?Maarten Balliauw – RealDolmenBlog: http://blog.maartenballiauw.beTwitter: @maartenballiauw

© 2008 Microsoft Corporation. All rights reserved. Microsoft, Windows, Windows Vista and other product names are or may be registered trademarks and/or trademarks in the U.S. and/or other countries.The information herein is for informational purposes only and represents the current view of Microsoft Corporation as of the date of this presentation. Because Microsoft must respond to changing market conditions, it should not be interpreted to be a commitment on the part of Microsoft, and Microsoft cannot guarantee the accuracy of any information provided after the date of this presentation. MICROSOFT MAKES NO WARRANTIES, EXPRESS, IMPLIED OR STATUTORY, AS TO THE INFORMATION IN THIS PRESENTATION.

MSDN - Converting an existing ASP.NET application to Windows Azure

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