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

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

Whoam I?
Maarten Balliauw
Antwerp, Belgium
www.realdolmen.com
Focus on web
ASP.NET, ASP.NET MVC, PHP, Azure, VSTS, …
MVP ASP.NET
http://blog.maartenballiauw.be
http://twitter.com/maartenballiauw

Agenda
Windows Azure?
An existing application…
Migration paths
Considerations
Q&A

What’s in the cloud?
Windows Azure

The Windows Azure Platform
Windows Azure
SQL Azure
Windows Azure platform AppFabric
Developer tools
Microsoft Codename “Dallas”

Windows Azure
Flexible application hosting
Lights-out service management
Provide code & service model, hit ENTER
Storage at massive scale
Compute
Storage
Management

SQL Azure
Relational database as a service
Highly available, automatically maintained
Extension of the SQL Server Data Platform
Business Analytics
Reporting
Data Sync
Database

SQL Azure
Relational database, provided as a service
Highly symmetrical development and tooling experience (use TDS protocol and T-SQL)
Highly scaled out, on commodity hardware
Built on the SQL Server technology foundation
Beyond “hosted database”
High availability, DB provisioning, and DB management are provided by the service
Pay for what you use

Windows Azure AppFabric
Secure connections between services
Across organizational boundaries
Claims-based access control
ServiceBus
AccessControl

Windows Azure AppFabric - Service Bus
Securely connect applications
Over the internet
Across any network topology
Across organizational boundaries
Primary application patterns
Eventing:
Notify applications and/or devices
Service Remoting:
Securely project on-premises services out to the cloud
Tunneling:
App-to-app communication with NAT/Firewall traversal

Windows Azure AppFabric - Access Control
Provides outsourcing of claims-based access control for REST web services
Key capabilities:
Usable from any platform
Low friction way to onboard new clients
Integrates with AD FS v2
Supports WRAP / SWT
Enables simple delegation
Used today by Service Bus and “Dallas”

Microsoft Codename “Dallas”
Content brokerage and discovery platform
Available as a CTP at commercial launch
Microsoft 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 providers
Process & analyze data
Empowers developers of all sizes
Built on Windows Azure and SQL Azure

Windows Azure

Blob
Container
Entities
Account
Table
http://<account>.blob.core.windows.net/<container>
http://<account>.table.core.windows.net/<table>
Messages
Queue
Windows Azure Storage Concepts
http://<account>.queue.core.windows.net/<queue>

Blob Storage
Store sets of binary data
Text files, images, …
Highly Available
Automatically scales to multiple servers and locations
Durable
Data is replicated at least 3 times

Table Storage
Store sets of structured data
Not bound to schema!
Billions of entities (rows) and TBs of data
Automatically scales to thousands of servers as traffic grows
Highly Available
Can always access your data
Durable
Data is replicated at least 3 times

Table Storage Capabilities
What tables don’t do
What tables can do












Not relational
No Referential Integrity
No Joins
Limited Queries
No Group by
No Aggregations
Transactions (limited)
Very Scalable
Flexible
Durable
Store LOTS of stuff 
Cheap
If these are important to you, use SQL Azure

Queue Service
Store a queue of messages
FIFO
Can be used by multiple worker roles

Windows Azure Summary
Many is better than one
Let Microsoft worry about this
Loose coupling
Web Role and Worker Role
Storage choice
Azure Storage: Simple stores scale
Table, Blob, Queue
SQL Azure: Full RDBMS
Stored Procedures, Schema, Transactions, Views etc

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

Existing ASP.NET application
ASP.NET Webforms
“Repository pattern”
Entity framework
Database
File storage on server
Built with no need for scale

An existing application
DEMO

The shortest way to the cloud
Migration paths

First things first…
Tools:
Windows Azure SDK
Windows Azure Visual Studio Tools
www.microsoft.com/web
New solution:
Blank “cloud service”
Add existing projects
Promote to “web role”

Migration paths: hosting & file storage
Windows Azure Web Role
Hosting the web application
Windows Azure Blob Storage
Hosting “user uploaded content”
Option 1: HttpHandler
+ Abstraction and migration freedom
- Traffic & related costs
Option 2: public blob container + Azure CDN
+ Traffic & related costs+ Pretty download URL
+ Fast! Nearby!
- Abstraction and migration freedom

Migration paths: data
Option 1: SQL Azure
Easiest migration path for data
More powerful RDBMS
Sync Framework Power Pack: http://bit.ly/5hTtSY
SQL Azure Migration Wizard: http://sqlazuremw.codeplex.com/
Option 2: Table storage
Will be cheaper in operating costs for small applications
Will probably require some rework

Migrating the application
DEMO

Think before you go cloudy…
Considerations

Hosting
Migration
Will be an easy migration
Remember to use the providers from the SDK
Keep the “multiple roles” idea in mind!
Considerations to make
Store all content in the application?
Requires a re-deployment quite often…
Better: store more dynamic content on blob storage
Background processing
Try moving heavy CPU tasks to worker role where appropriate
One web role?
Will be cheaper…
But will have your application down during upgrade…
Better: always > 1 web role (at least 2)

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

Architecture
Quote: “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 roles
But not for unlimited web roles…
Think in “multiple roles”
Web roles
Backedbyworkerroleswhereneeded
Architecture will be one of the challenges

Typical Architecture
Service Unavailable
VIP
Worker Role
Web Role
Windows Azure Storage
(Blob, Table, Queue)

Web + Worker Role Service Model
Worker Role
Service Still Available
Worker Role
Web Role
VIP
Worker Role
Web Role
Worker Role
Worker Role
Windows Azure Storage
(Blob, Table, Queue)

Windows Azure - Coming soon…
Programming model
Administrator privileges in the VM
Deployment of pre-configured VM images
Still obtain the benefits of the WA service model
Storage
User-selectable geo-locations for replicas
Secondary indices on tables
Service management
Remote terminal server access to VMs

Resources
Windows Azurehttp://www.azure.com
Steve Marxhttp://blog.smarx.com/
Clemens Vastershttp://vasters.com/clemensv/
Simon Guesthttp://simonguest.com/blogs/smguest
PDChttp://microsoftpdc.com
My bloghttp://blog.maartenballiauw.be/category/Azure.aspx
RealDolmen blogs is running on Azure!http://www.realdolmenblogs.com

AZUG.BE – Azure User Group Belgium
Focus on the Azure Services Platform
Community-driven
Focus on architecture
And development
And the business value of Azure
www.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.

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

by Maarten Balliauw on Nov 24, 2009

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