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Dive into the Windows Azure Platform DEMO: Migrating an existing on-premise
application to Azure .NET development differences with the
Windows Azure Platform
Windows Azure
Applications
AppFabric
SQL Azure
Applications
Others Mobile Desktop Server
Fabric
Storage
Config
Compute
Application
AppFabric
Windows Azure
Applications
Applications
SQL Azure
Others Mobile
Desktop
Server
IIS7
Web Hosting Web Services
Storage Services
Public Internet
Web Role
Load Balancer
Self hosted
“Windows Services”
Infinite Loop
Storage Service
Public Internet
Worker Role
Load Balancer
Open - REST interface
HTTP or HTTPS
Authenticated using secret keys Can access from outside Azure All data replicated at least 3 times
Table Storage Blob Storage Queue Drive
Provide access rights to containers and blobs
Start
Expiry
Permission (r, w, d, l)
Resource (c, b)
No limits on number of Queues Message:
Max size 8kb
Operations:
▪ Enqueue
▪ Dequeue
▪ RemoveMessage
Queues guarantee a message will be processed at least once.
Allows recovery in the event of errors
Message come back to life if not Removed
Approximates First In First Out queue
Partition Key for Scale Row Key for performance
Non-RowKey queries result in a partition scan
Row Key and Partition Key as strings Data sorted by Row Key within a Partition
Denormalise the data for performance These aren’t SQL tables
PartitionKey (Category)
RowKey (Title)
Timestamp ReleaseDate
Action Fast & Furious … 2009
Action The Bourne Ultimatum
… 2007
… … … …
Animation Open Season 2 … 2009
Animation The Ant Bully … 2006
… … … …
Comedy Office Space … 1999
… … … …
SciFi X-Men Origins: Wolverine
… 2009
… … … …
War Defiance … 2008
Fast query by Partition Key and Row Key
PartitionKey (Category)
RowKey (Title)
ReleaseDate
Action Fast & Furious 2009
Action The Bourne Ultimatum
2007
… … …
Animation Open Season 2 2009
Animation The Ant Bully 2006
… … …
Comedy Office Space 1999
… … …
SciFi X-Men Origins: Wolverine
2009
PartitionKey (ReleaseDate)
RowKey (Title)
Category
2009 Fast & Furious Action
2007 The Bourne Ultimatum
Action
… … …
2009 Open Season 2 Animation
2006 The Ant Bully Animation
… … …
1999 Office Space Comedy
… … …
2009 X-Men Origins: Wolverine
SciFi
Film_ByCategory Film_ByReleaseDate
Example
PartitionKey
RowKey Title Date Approve Cost Centre
Description Amount
123 Client meeting
1/6/10 Y 123
123 1 Travel £15.00
123 2 Lunch £10.00
123 3 Drinks £25.00
456 Training course
5/8/10 N 123
.... .... .... .... .... .... .... ....
Motivation: Ensure that modifications to a master record and its
item records are performed in a transactional way.
Implementation : Multiple entity types stored in single table with the
same partition key can utilise the Windows Azure Table entity group transaction feature that provides batch transactions on entities.
Uses: When a transactional operation is required.
Retry when connections fail Expect network latency (e.g. SQL Azure) Be stateless Design for failure
Don’t rely on local storage
Allow for restart in inconsistent state
Be aware of the emerging patterns for Azure
http://bit.ly/9Wsrk
Choose you Table partition key carefully
Development Fabric Differences from development and live Test early and often
Limited registry and disk access Logging and Diagnostics Configuration
app and web config for runtime static configuration Azure configuration for simple strings Roll your own for more complex configuration
Deployment Only core .NET assemblies are pre-deployed in Azure. You
need to deploy any custom libraries yourself.
Transact-SQL Features Supported Transact-SQL Features Unsupported
Constants
Constraints
Cursors
Index management and rebuilding
indexes
Local temporary tables
Reserved keywords
Stored procedures
Statistics management
Transactions
Triggers
Tables, joins, and table variables
User-defined functions
Views, including sys.synonyms view
Spatial data and indexes (June 2010)
Common Language Runtime (CLR)
Database file placement
Database mirroring
Distributed queries
Distributed transactions
Filegroup management
Global temporary tables
SQL Server configuration options
SQL Server Service Broker
System tables
Trace Flags
Further reading http://www.azure.com/ http://blog.smarx.com/
Signup for Azure http://www.microsoft.com/windowsazure/offers/
(Credit card required) Ensure that you complete delete a deployment –
otherwise you will be charged! Join your local user group
UK (http://ukazurenet.com) Buy a book
http://tinyurl.com/azurebook
“Thinking of... Delivering Solutions on the Windows Azure Platform?”
ISBN: 0956155634
