As a case study, I have, in production, 4 Dell 2850 servers (running Red Hat Enterprise V4.) Apache httpd on one, using JK for load balancing. The other three are running Tomcat in a 3-way multicast cluster, multicasting with replication on a private VLAN (192.168.x) The application accesses several DB servers running Oracle and MySQL, depending on the DB requested.
Over time, this handles 2 requests per second average, with peaks at about 5-6 requests per second (Per Tomcat, so times 3). This does not begin to tax the Tomcat servers for memory or CPU. The bulk of the time is database latency. Our usage profile is extremely regular and predictable -- we service school districts and they mainly use it from 8 to 3 (local time.) This configuration has been very reliable and far-surpasses the system it replaced - based on IIS and JRun. HTH, Tim -----Original Message----- From: David O'Dell [mailto:[EMAIL PROTECTED] Sent: Monday, November 13, 2006 2:27 PM To: Tomcat Users List Subject: session replication/tomcat 5.5 Is anyone using session replication in production? Is there an alternative to using multicasting? In the doc http://tomcat.apache.org/tomcat-5.5-doc/cluster-howto.html It states "This is an algorithm that is only efficient when the clusters are small." I have 6 tomcat instances behind a load balancer, is this still considered small? --------------------------------------------------------------------- To start a new topic, e-mail: users@tomcat.apache.org To unsubscribe, e-mail: [EMAIL PROTECTED] For additional commands, e-mail: [EMAIL PROTECTED] --------------------------------------------------------------------- To start a new topic, e-mail: users@tomcat.apache.org To unsubscribe, e-mail: [EMAIL PROTECTED] For additional commands, e-mail: [EMAIL PROTECTED]