December, 2006

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Linux Bonding

Sample Image Bonding allows you to aggregate multiple ports into a single group, effectively combining the bandwidth into a single connection. Bonding also allows you to create multi-gigabit pipes to transport traffic through the highest traffic areas of your network. For example, you can aggregate three megabits ports into a three-megabits trunk port. That is equivalent with having one interface with three megabytes speed.
You can use it wherever you need redundant links, fault tolerance or load balancing networks. It is the best way to have a high availability network segment. A very useful way to use bonding is to use it in connection with 802.1q VLAN support (your network equipment must have 802.1q protocol implemented).

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Tomcat Cluster Session Replication

Sample ImageTomcat Cluster Session Replication how to is a document that describes how we can setup a tomcat 5.5 cluster with apache web server frontend using in-memory session replication.
Tomcat 5.5.x has significant performance improvements than tomcat 5.0, mostly because of java 5 (from performance metrics taken with jmeter –  about 50% faster in compilation of classes/jsp/servlets). In our example we will use 1 apache instance that load balance requests along 4 instances of tomcat servers in 2 different servers. 

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