Download via ASP.NET can impact IIS performance?

I doing a upload system for my blog engine and thinking if is a good idea to store my files at database/app_data. Or I should store at开发者_如何学Go a normal folder with write permission.

My concern is about downloading large files through ASP.NET. ASP.NET will hold a thread until client ends the download?

when there is a limitation of requests per second of IIS, so if download a large file, IIS will spent more time to maintence the connection between client and server.

Obvoiusly download a large file will impact IIS performance