ScaleOut Software has a product to manage sessions on a web farm. I have tried this product and have had nothing but issues. I did actually end up getting it working once, but it turns out, even when it does work correctly, it gives your network problems
It seems that the fix for any issue is “You arent running the latest version” – which might be true, but many times, we would be running version 1.3.2 for example that we downloaded two days ago, and then they release 1.3.2.1 the day after we downloaded 1.3.2 – this is a cop out in saying that its on our end, when in reality it is just buggy software that has releases every other day to fix bugs. I dont know if there is any other competing product in the market right now though, so they kind of have it locked. You can use Microsoft’s ASP.Net Session provider, but that is limited when in a farm scenario. Using MSSQL for your sessions has performance issues. I have heard that ex-microsofties tell people to just roll their own, but that seems too much, especially in a small shop. Hopefully ScaleOut gets more stable, because it could be a good product, if it just didn’t cause issues 🙂