maximum concurent user allowed

What is the maximum connection able to support in ASP.NET application? Can it support up to 25,000 concurrent user? I have an experience where aspnet_wp cannot hold too many recources and need to be reset.

ASP.NET will support as many as you give it. However, you need to be on Windows Server 2000 or 2003, which has no limit on the number of concurrent requests unless you specify it to. However, with that many concurrent requests, a load balancer or web garden might not be a bad idea. Otherwise, the worker process might get overwhelmed.

Thanks Kevin.

Do you have any recommendation on the hardware and software in order to achieve that?

thanks

It would all depend on your application I would think and your milage could vary.

If you are interested in how many concurrent users an ASP.NET site can handle on a per server basis realize that MySpace.com is a .NET application running on like 125 servers. See the Mix 06 Keynote for some details on it.http://sessions.visitmix.com/

Alsowww.plentyoffish.com runs off 4 servers, 1 web, 1 image, 1 mail and 1 database server.http://media.webmasterradio.fm/episodes/audio/2006/NI062706.mp3 is a podcast where he talks about the site and mentions the architecture.