Hi, Currently, JRun Advanced Edition and Enterprise Edition ship with ClusterCATS. ClusterCATS provides HTTP load balancing and failover. This means it sits in front of your web servers and distributes requests across those servers. ClusterCATS receives application specific information from JRun so it makes intelligent choices about where to send traffic. ClusterCATS is suited for situations where the Web Server and Application Server reside on the same physical machine. We find many people are now using hardware devices (such as Cisco Local Director and others) for this type of clustering.
The next release of JRun, code-named Nozomi, will implement clustering (load balancing and failover) in the application server itself. This will provide a much more robust clustering solution for JRun deployments. First, clustering functionality will reside in the Web Server Connectors themselves. This provides much better support for distributed configurations because load balancing can be done across the HTTP (web) servers with the JRun servers clustered behind them. This allows configurations where there are many HTTP servers and a few JRun servers, or vice versa. We will support Load Balancing, both canned algorithms and custom algorithms, and automatic failover. Session state is maintained the same way it is in JRun 3.1. Second, every server object in the server is clustered too. By server object, I'm talking about EJB components (stateful, stateless and entity), JMS queues and topics, Server resources, JNDI trees and any custom service you build for JRun. This means that any resource your web application depends is highly available. Load balancing across these resources is also supported. I encourage everyone to download the public beta of this release that will be available early next week. I will post instructions on how to access the beta once it is available. Mark PS. Neo is built on J2EE technology. JRun will be the J2EE engine running inside Neo. JRun will continue to be available separate from Neo as Macromedia's full blown J2EE application server. -------------------------------------------- Mark Field JRun Product Management Macromedia, Inc (617) 219-7742 -----Original Message----- From: Justin MacCarthy [mailto:[EMAIL PROTECTED]] Sent: Monday, January 07, 2002 7:01 PM To: JRun-Talk Subject: newbie questions - clustering We are using CF currently, but are evaluating JRun & J2EE and possibly a mixed cf/java platform. I've read that the current version of JRun (3.1) does not support clustering. When is the next version release date, is there any info on the features that will be included in this area? Will JRun be part of the NEO ?? If you can point me towards any info, that would be excellent. Thanks ~J ______________________________________________________________________ Get the mailserver that powers this list at http://www.coolfusion.com Archives: http://www.mail-archive.com/[email protected]/ Unsubscribe: http://www.houseoffusion.com/index.cfm?sidebar=lists
