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From: Mr. Arnold on 16 Apr 2010 15:02
Simon Roust wrote:

> We are a bit worried about overloading our PDF generation server with
> requests (as we get a big peak load from students when we release the
> student results as students are naturally anxious to see how they did),
> unfortunately we don't have the option of spreading out the release of
> results gradually.
>
> So we'd like to build in a mechanism to throttle the number of
> simultaneous webservice calls we make from the website. (the exact
> number of requests will be determined when we see what sort of impact
> they have on the server when we do some volume testing). It has been
> deemed acceptable to give the user a "Sorry we are busy, please try
> again later." message when we run out of capacity.
>
> Can anybody give me some advice on how we can best manage the number of
> concurrent requests we're making to the webservice. I think I'll need
> to keep some sort of reference counting to count how many asp.net
> threads have started a call to the webservice and how many have
> completed. Or is there an easier / better option? We don't really
> want to just limit the number of webserver asp.net threads as we'd like
> to keep serving "simple pages" to other clients even when we're "busy".
>
> The website will be developed using ASP.NET 2.0 + Visual Studio 2005 (or
> perhaps VS 2008 targeting the .NET 2.0 framework).

<http://www.devproconnections.com/article/net-framework2/concurrency-and-throttling-configurations-for-wcf-services.aspx>
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