Im trying to build a web-link to a busy social networking website using intraweb.
Intraweb creates temporary folders for each session to store temporary files, which auto-delete when the session expires.
If hosted on Win 32, the limit is 65,536 folders - which means only 65k concurrent sessions are possible.
Is there a way to turn off the temp file creation or allow for more concurrent sessions in intraweb?
I am pretty sure you'll run out of system resources before you get close to 65,000 users on one box. To handle that load you'll need a load-balanced cluster, and then the 65K limit won't be an issue. I would not focus on this limitation.
IntraWeb is just not designed for handling such session amounts. IntraWeb is designed for Web applications and not for Web sites. Eventhough a plain IntraWeb session takes only a few kbytes, IntraWeb's session handling model is more a "fat" model. It is perfectly suited for creating complex stateful applications that can handle a few hundred concurrent sessions.
For Web sites with thousands of users per day - where many users just open one page and go away again - you /could/ certainly use Webbroker - but that basically means that you have to build up everything from scratch.
If you are a Delphi guy then I would recommend looking into Delphi Prism plus ASP.NET. There are tons of ASP.NET controls that simplify building your Web site in a rapid way. ASP.NET controls from DevExpress.com, Telerik.com and others work perfectly fine in Delphi Prism.