What is the best way to upload large files with many users?

I have a website that I rent a private Server for it. It's a registration website in which users have to upload their photos or documents in order to register.

The problem is that in the same time 100 users are uploading 10MB photos on it and it causes some issues and finally none of them can upload their photo and register. I doubt that its depends on the server bandwidths and think that there should be another reason and a solution for this.

Now I limit the upload size to 4MB开发者_如何学Go (in web.config) and it seems to work without any problem while in the near future I have to unlimit the size because my website is going to pass Beta to final.

What's the best solution for this?

Update : Actually the website provided for a festival where photographers have to upload their Original photos (which taken with DSLRs and most of them have 10MB photos)

Also as I told I don't think that this is related to server because I don't have new users, but my current users ( or few new ones) are uploading their photos in ordr to submit their photos to festival

Web farm would be last option for me

Have a look at this nice article to understand the limitations with default asp.net file uploader.

Changing the maxRequestLength might not be sufficient but it may be required to increase the executionTimeout as well. Try those options.

If you still fail, you might want to use a third party fileupload component .

Telerik has a nice component - http://www.telerik.com/products/aspnet-ajax/upload.aspx

File uploader ( i've used sometime back and it was pretty good in the multi user enviornements) - http://www.mediachase.com/fuploader/overview.aspx

Both the above are commercial versions and here is a free one from codeplex. (havent tried this though) - http://neatupload.codeplex.com/