Jelastic provides session replication between instances of web-servers (TomEE 1.7, Tomcat 6/7, GlassFish 3, Jetty 6).
Session replication is a mechanism used to replicate the data stored in a session between different instances, which have to be a part of the same cluster. When session replication is enabled in a cluster environment, the entire session data is copied on a replicated instance. The session replication operation does not copy the attributes that cannot be serialized in a session and any instance specific data. Session replication provides high reliability, scalability, and perfect failover capabilities.
In Jelastic the process of replication takes place with a help of multicast. In such a way we have the next benefits:
- session exchange between the nodes through the local net;
- there is no need to use additional programmes of memcache type and that's why there are less destruction points in the system.