RE: WSE 3.0 SOAP Router for load balancing

Hi Steven,

Thanks for your reply, it answers my question.

It is not allways possible for us to go the hardware or windows based load
balancing way as it depends on customer infrastructure.

I had just understood that it was possible to do load balancing
functionallity based on configuration of the refferalCache, but unfortunately
this is not the case.

I was going to take a custom approch to "Route SOAP Messages Based Upon
Their Content", which you also describes in #2. Then I could store the
routing information in a database (or xml file), and maybe even do a mix of
load balancing and content based routing in the custom routing functionality.
It leaves an issue of a dynamic URI in the SoapActor attribute of the
recieving services.
*************
[SoapActor("http://SoapRouterName/RoutedService.asmx";)]
public class StockTraderService : System.Web.Services.WebService
{
//Web service implementation
}
*************
To make it all configurable, it would be great if this URI could be fetched
from the database as well, but as far as I know this is not possible because
this is compiled code - or is it?

Sincerely

Glenn M. Sørensen

"Steven Cheng[MSFT]" wrote:

Hi Glenn,

For the WSE 3 loading balance, I think you can consider the following
approaches:

1. Is it possible that you use hardware or windows operating system's
loading balance feature? Thus, you can simply let a single front server
accept the requests and let the underlying loading balance framework to
redirect requests to back end service server

2. WSE 3.0's rounter feature is mainly used for hidden the backend service
server from front end client users. If you want to use it in a loading
balance model, I think you may need to write the custom SoapRouter and do
the loading balance redirect code logic in it:

#Routing SOAP Messages with WSE
http://msdn2.microsoft.com/en-us/library/aa529328.aspx

#How to: Route SOAP Messages Based Upon Their Content
http://msdn2.microsoft.com/en-us/library/aa528755.aspx

As in the "Route SOAP Messages Based Upon Their Content" example indicate,
you can programmatically determine the target url you want to redirect a
WSE request, and for your custom loading balance router, you may need to
give the proper target servers(from all balance servers) url. How do you
think?

Sincerely,

Steven Cheng

Microsoft MSDN Online Support Lead



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--------------------


Hi,

I've read several places and in several books, that you can implement load
balancing with WSE 3.0 and the httpHandler
Microsoft.Web.Services3.Messaging.SoapHttpRouter component (WS-Referral). I
have only been able to implement the chain and content.based routing models.

Does anyone know if and how you implement the load balancing routing model?

/Glenn

.

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