> We *MUST* be using CF Enterprise if we are on clustered > servers?
No, you can use CF Professional on clustered servers. CF 5 Enterprise Edition comes with ClusterCATS, which is software that you can use to cluster your servers and manage that cluster, but if you're using another clustering solution, you don't necessarily need ClusterCATS also. > What happens if we are on Professional and one server dies? The same thing that happens if you're on Enterprise and one server dies, assuming you've got your own clustering solution instead of ClusterCATS. > Session vars will be lost? Yes. This is true for CF 5 Enterprise Edition, also. Typically, one might use Client variables instead of Session variables for applications that will be deployed on a cluster, so that you don't have to worry about this problem. A shared datasource could then be used as the repository for these variables. Even if one server doesn't fail, there will be an issue with using Session variables. To use them, you'd need to configure your cluster to use "sticky" sessions, in which a user is initially directed to the least busy server, but is subsequently redirected to the same server for their entire session, no matter how busy that server may be later. This largely negates the value of load balancing, as well as failover. > Users who are in the middle of a web based 'app' would > have to start over? Yes, if you're using Session variables for state management. > Is that the only problem (not that it's a small problem... > but i'm trying to find out all of the angles so I can make > a report to da boss)? No, it's not the only problem. Content replication might be a problem, also. I imagine there are other things that don't come to mind right now, that might also be problems. > Also, *if* it is feasible to use CF Pro in a clustered > environment, would we be responsible for having licenses > for each server (this, of course, would be a moot point > if clustered servers MUST be on CF Enterprise). Yes. Each cluster member must have a licensed copy of whatever software you put on it, for "responsibility" purposes. This is true for CF Professional or CF Enterprise. Dave Watts, CTO, Fig Leaf Software http://www.figleaf.com/ voice: (202) 797-5496 fax: (202) 797-5444 ::::::::::::: dream :: design :: develop ::::::::::::: MXDC 02 :: Join us at this all day conference for designers & developers to learn tips, tricks, best practices and more for the entire Macromedia MX suite. September 28, 2002 :: http://www.mxdc02.com/ (Register today, seats are limited!) :::::::::::::::::::::::::::::::::::::::::::::::::::::: ______________________________________________________________________ Your ad could be here. Monies from ads go to support these lists and provide more resources for the community. http://www.fusionauthority.com/ads.cfm FAQ: http://www.thenetprofits.co.uk/coldfusion/faq Archives: http://www.mail-archive.com/[email protected]/ Unsubscribe: http://www.houseoffusion.com/index.cfm?sidebar=lists
