Alteon's ACEdirector switch is rich with capabilities. This article sorts through the vast variety of possible switch configurations and defines setup parameters best suited to the needs of most Macromedia enterprise server customers. It describes a basic procedure resulting in a server farm running ColdFusion or JRun behind an ACEdirector (AD3).
Frank DeRienzo, MBA, MCSE
Principal Technical Support Engineer
The AD3 will manage session traffic through a virtual server. The AD3 virtual server will associate with each Web/application server in the farm; AD3 will monitor the health of each Web/application server in the farm and distribute session load accordingly. ClusterCATS (CC) will provide probes that proactively monitor the health of any web server: NES, IIS, or Apache. It will also monitor JRun or ColdFusion. If either the Web server or application server hangs, CC will kick the server back up and send out status alerts via E-mail. The combination of CC and AD3 presents a paradigm for Web site resiliency.
Note: If you are running ColdFusion 5, instead of clustering, you may wish to use the Server Monitoring option with AD3. ColdFusion 5 Server Monitoring provides all the server level capabilities of CC without the overhead of a cluster.
Note also: If you wish to set up your server farm in distributed mode (DM) by separating your Web servers and your application servers onto different systems, go to the Macromedia Support Center and search on the key word distributed. The articles which appear will provide procedures and recommendations for configuring a distributed mode server farm. You will also find distributed mode referenced under the Designer and Developer link on the Macromedia home page.