Yes. You add one or more instances to one or more servers. Then you define a cluster, add the instances to it, and choose a load balancing algorithm. You then associate that cluster with your IIS site (or apache virtual server etc)
In my experience, clusters can be a little cranky if you are making changes to them, but once they are up they work pretty well. The main gotcha's for clustering IMO are: * Features that require subsequent HTTP requests to target the same initial server (cfchart, cfimage) * Data that is specific to a users and stored in a persistent scope like session or Application does not automatically follow users from once instance to another. Session replication can solve the latter, but still has some problems I think, and not many people seem to use it. Sticky sessions eliminates both problems for the most part, and seems to be the most common way to handle clusters. Of course, the failure of an instance won't be helped by sticky sessions since that only sticks a users to an instance as long as it is still up. ~Brad ----- Original Message ----- From: "Richard Steele" <[EMAIL PROTECTED]> To: "CF-Talk" <cf-talk@houseoffusion.com> Sent: Friday, August 29, 2008 9:54 PM Subject: Re: cf8 enterprise failover > Ah, ok. So one defines a cluster for an application within the cf8 > enterprise server and then if an instance within the cluster hangs, then > traffic is redirected? Am I understanding that right? And that works well? > Thanks. > >>New instances are not spawned. Traffic is simply redirected to other >>instances in the cluster. >>Depending on how you define "hang"-- yes, once an instance stops >>responding >>the Webserver connectors no longer send traffic to it until it comes back >>up. >> >>Please be aware that JRun clustering is not necessarily application aware. >>You can weigh an instance, but you cannot control the balancing based off >>server load, users, etc. >> >>~Brad >> >>> Does cf8 enterprise failover work well? IOW, if an instance hangs does >>> it >>> spawn a new instance seamlessly? >>> Thank in advance. >>> >>> > > ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~| Adobe® ColdFusion® 8 software 8 is the most important and dramatic release to date Get the Free Trial http://ad.doubleclick.net/clk;203748912;27390454;j Archive: http://www.houseoffusion.com/groups/CF-Talk/message.cfm/messageid:311825 Subscription: http://www.houseoffusion.com/groups/CF-Talk/subscribe.cfm Unsubscribe: http://www.houseoffusion.com/cf_lists/unsubscribe.cfm?user=89.70.4
