There is already a Hosters' Forum. Would that be a good place to jump in? Or do we need something else? I see that the hoster's forum gets little traffic.

I have a dedicated server via Power DNN and currently have about a dozen DNN installs on it with anywhere from 1 - 30 portals on each install. My original goal was to use DNN to host a large number of sites (100 - 1000) per DNN install and I still would like to do that for specific vertical markets.  I have recently started just putting some new customers on their own DNN install. It depends on the nature and importance of the customer. Not sure how long I will go down that path, but it does make it easier to do certain things for some high end customers that may want several sites of their own. I am also using the DotNetPanel for my control panel and it has turned out to work really nice. I use SmarterTools for mail, stats and help desk. Gene6FTP rounds out my offering.

I have been around since DNN 1 and currently have all my installs at 4.4.1. I did not upgrade any of my DNN 2 installs to DNN 3, I just recreated them from scratch. That was mainly due to the breaking changes and the fact that I had heavily built my sites around the Magic Gadget module...which was so great, but the developer just disappeared into thin air. That taught me a huge lesson early on regarding working with third-party tools and getting source if at all possible. Anyone ever figure out what happened to John LaRoche (I think that was his name)?

I would definitely be interested in working with others on determining really how scalable DNN is. I was getting a lot of memory errors and my sites were running slow in Admin mode. But I only had 1GB of memory. I upgraded to 2GB and now my SQL server is not constrained and I don't get memory errors and sites are much faster in admin mode. I still think I probably have a few issues with some modules, but not many. I would like to upgrade my server, but need to generate the $$ to justify it.

I have another group of 4 high end servers with a load balancer at PowerDNN. I will be running only 1 DNN site on that (for now) and 1 large PHP-based membership site. I have two web heads, 1 MySQL and 1 SQL server. I am just now setting up the PeerSync software to do the two-way real-time synchronization between the two webheads. Another DNN guy recommended PeerSync. At first blush it looks pretty good. So...we will see how that goes.

Count me in on any discussions and email me if you would like to swap additional contact info like Skype or Yahoo IM.

Not that I am up to speed yet on VS 2005 etc. but... Has anyone actually run the CLR profiler (and subsequent tools) against DNN installations? There is a good bit of information etc as MSDN about .NET performance tuning, memory usage as well as things such as the CLR (common language runtime) profiler.

I asked in another thread (I think) about some of this. I had read someplace or another that DNN was a memory chow hound, I assume this was more pre .NET 2.0 as MS made significant improvements in efficienncy since 1.1. But, I am curious to know DNN performance characteristics myself. Our hosting is on shared servers, good companies (DiscountASP.NET and Gate.com). In our case we're interested in how many users can an installation (one portal) deal with given pretty much the standard project/core modules. Course, there are various dependencies on such things. It would be helpful however to know that a session is nn to nn KB per session.

Perhaps someone might want take a look at the MSDN stuff and run some tests against their servers, obviously this is not something that can be credibly done by say myself against a shared server for obvious reasons. But for those of you who are running your own servers it'd be most helpful to all the DNN community to see some profiling stat's of DNN.

I'd kinda just like to know an outline of memory usage per session (average) and system CPU loading averages.

Its tough to gauge where to use DNN (and I'd guess for many people) or exactly what one can do with it without knowing what it can handle in user sessions.

With the varied CMS's I have used that are unix/linux based its not been an issue as the ability to offload work from a server is always there (albeit often not a breeze).

But we did some work (few private components) for a Joomla site and they were able to hold 5000+ users on one installation with no notable degredation in performance.