SqlCacheDependency via Service Broker Notification in a WebEdition of SqlServer 2008 R2

Question

I would appreciate Your help:

We are planing to buy SQL Server 2008 R2 Web Edition (we must this version), however we would also like to use a functionality of Service Broker for SqlCacheDependency - Notification Mode ( NOT polling mode).

http://msdn.microsoft.com/en-us/library/cc645993%28v=sql.105%29.aspx is said that Web Edition support for Service Broker (messaging) is : "Client only" - so some kind of short version.

Our server-environment is:

• one Http server with two web-application
• one DataBase server with single instance of SQL Server 2008 R2 Web Edition.

The idea is that: when new record is added to database table, sql server should notify both web-apllications and reset their caches (so we will have two integral caches). We are not planing to create a distributed cache (MemCache or sth)

Is there any way to combine these two demands ( SqlCacheDependency via Service Broker Notification in a WebEdition of SqlServer 2008 R2 ) ? Buy a module, or some server architecture tricks. Any ides ?

Thanks in advance.

Answer 1

The "client only" is kind of a misnomer. It means that two Service Broker services that exchange services must route the message through at least a higher edition version. An Express Edition cannot exchange messages with another Express Edition unless a Standard (or higher) edition server routes the messages between them.

While this is educational, is also completely irrelevant for you since Query Notifications ( the feature behind the SqlCaheDependency modus operandi ), never has to send a message remotely to another SQL Server instance . Is all local, so the 'client-only' restriction never applies. To be 100% accurate I should add that the way SqlCacheDependency uses Query Notifications never requires remote messaging, but this is splitting hairs.

I recommend you read the article linked, your post shows quite a few misunderstanding on how this technology works.