I agree with Dave on this one: set sticky sessions on the LB, and let each web server stand independently so there are no single failure points. If you need true failover, refactor the apps to use client vars and store them in a database for clean 'session' replication across the web servers.
---------------------------------------- From: "Dave Watts" <[email protected]> Sent: Tuesday, January 25, 2011 9:11 AM To: "cf-talk" <[email protected]> Subject: Re: Clustering ColdFusion - some "black holes" > Goal: > One rock stable high performance ColdFusion cluster with session replication and quick > failover Is there a specific requirement for session replication? Because you might get generally better results if you just use sticky sessions. That buys you load balancing, but not complete failover - but it may be enough, if your failure rate is acceptably low. I've set up session replication for a couple of clients, and the whole thing just seemed a bit fragile to me. I'd prefer to use a database for session management in this case, I think - which might involve using Client variables instead of Session variables, or might involve custom code to synchronize Session variables with a database. > I've seen descriptions where the same cluster (same cluster name) is created on every > physical server, and the connector setup is run against localhost, but that doesn't make > sense either.. ? Yeah, that doesn't really make sense to me either. Dave Watts, CTO, Fig Leaf Software http://www.figleaf.com/ http://training.figleaf.com/ Fig Leaf Software is a Veteran-Owned Small Business (VOSB) on GSA Schedule, and provides the highest caliber vendor-authorized instruction at our training centers, online, or onsite. ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~| Order the Adobe Coldfusion Anthology now! http://www.amazon.com/Adobe-Coldfusion-Anthology/dp/1430272155/?tag=houseoffusion Archive: http://www.houseoffusion.com/groups/cf-talk/message.cfm/messageid:341172 Subscription: http://www.houseoffusion.com/groups/cf-talk/subscribe.cfm Unsubscribe: http://www.houseoffusion.com/groups/cf-talk/unsubscribe.cfm
