If you want a complete, enterprise-ready solution, you will need CF Enterprise. This will give you almost no noticable problem if a server goes down.
Otherwise, you can use CF Standard on two separate servers. If you use the OS's load balancing and failover such as Windows' NLB, and use single affinity (sticky sessions) you shouldn't have a problem. The sticky sessions will keep your users from automatically switching from one CF server to the other and losing their sessions. Of course, if a server goes down hard, the users will be shunted to the other server which will require their session to be re-created. This could simply mean a slight delay while their session variables are being set, or they could be asked to log in to the application again. If we are to pursue redundancy, this would be our solution. From what I remember, Roland Collins uses this solution as well. You might search back through this list. I think it was about a year back. M!ke -----Original Message----- From: Dustin M Snell [Network Automation] [mailto:[EMAIL PROTECTED] Sent: Tuesday, August 30, 2005 2:01 PM To: CF-Talk Subject: 1 ColdFusion Failover costs 8-10x more than a standalone server! Hi, We are having major reliability problems with ColdFusion 7. These problems have been discussed here before with no real solutions. For example: JRUN will go completely haywire and take all the CPU and Virtual Memory on the system about once every 2 days, sometimes multiple times a day. We haven't been able to figure out why. For this and other reasons (such as the occasional upgrade), we have decided that a 2 server cluster would be a good idea so at least we could get some redundancy. We don't need load balancing really, just failover but it looks like you usually get both no matter what you do. Unfortunately, after calling Macromedia I have found that the only way to do this is to buy 2 licenses of ColdFusion Enterprise. So basically this will entail approximately a $10k+ investment in just Coldfusion licenses (not to mention hardware etc), which works out to about 8 times our original investment for the existing license, just to get some redundancy! So the formula is: 1 server solution = $695-$1200 (depending on upgrade or new) 1 redundant server solution (2 servers with same content) = $10,000+ Does this make sense to everyone here? For the love of God can someone tell me please: is there another way to get some redundancy? -Dustin Snell Network Automation, Inc ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~| Logware (www.logware.us): a new and convenient web-based time tracking application. Start tracking and documenting hours spent on a project or with a client with Logware today. Try it for free with a 15 day trial account. http://www.houseoffusion.com/banners/view.cfm?bannerid=67 Message: http://www.houseoffusion.com/lists.cfm/link=i:4:216868 Archives: http://www.houseoffusion.com/cf_lists/threads.cfm/4 Subscription: http://www.houseoffusion.com/lists.cfm/link=s:4 Unsubscribe: http://www.houseoffusion.com/cf_lists/unsubscribe.cfm?user=89.70.4 Donations & Support: http://www.houseoffusion.com/tiny.cfm/54
