External Configuration Store

Moving the configuration information out of the application deployment package to a centralized location. 

When to use this pattern?  

• Configuration Settings that are shared between multiple applications, application instances.  

• Standard configuration system that doesn’t support required settings (image, complex data types)  

• Complementary store for some of the settings for applications, while allowing applications to override some of the centrally stored settings.  

• Simplify administration of multiple applications 

Local Cache could be an XML file stored in the storage account.

Considerations  

• Performance, availability  

• Schema  

• Complexity  

• Scope, inheritance  

• Formats  

• Errors  

• Access Control  

• Testing  

• Caching Expiration Policy