The Cloud - be it private, public or hybrid - is kind of like Las Vegas. There's lots of interesting things you can do, it can be an amazing experience, but there are also alot of smart people making bad decisions. This session aims to help make the trip to "Cloud Vegas" an enjoyable one. The session reviews a number of the recurring themes we've seen in 60+ services engagements on Azure. Specificalyy, scenarios, misconceptions and mistakes we've seen in customers, partners and ISV engagements - and more importantly, how to avoid them.

11. Always implement retry logic in your code
Implemented in Azure Storage client
Required for success with SQL Azure
Queries can fail for various reasons –
a malformed query, network issues, etc.
Some errors are transient, the problem often
goes away by itself
It makes sense to retry the query after a short interval
If the query still fails after several retries,
you would report an error
Not just for storage operations
A best practice when calling cloud services

12. Part of Microsoft Enterprise Library 5.0 Integration Pack for
Windows Azure
Set of reusable components for adding intelligent retry logic
into applications leveraging:
SQL Azure
Windows Azure Storage
Windows Azure Service Bus
Windows Azure Caching Service
Enables the developer to select from the following retry
strategies:
Incremental
Fixed interval
Exponential back-off
Extendible strategies
Error detection
Custom retry logic

15. Volume Velocity
Variety Sensitivity
Queryability

18. • Canonical 3 tier app scales by adding and removing
nodes in front and middle tiers.
• Federations extend the model to the DB Tier
• In SQL Azure partitions have associated per db costs
• In highly elastic scenarios partitions may be needed
for just a few hours or days
• If load is predictable, partition before load
commences, de-partition after load has subsided

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