session-replication

I've been searching (with little success) for a free/opensource session clustering and replication solution for asp.net. I've run across the usual suspects (indexus sharedcache, memcached), however, each has some limitations. Indexus - Very immature, stubbed session interface implementation. Its otherwise a great caching solution, though. Memcached - Little replication/failover support without going to a db backend. Several SF.Net projects - All aborted in the early stages... nothing that appears to have any traction, and one which seems to have gone all commercial. Microsoft Velocity - Not

I am working on a project that requires really high availability and my team is currently working on upgrading some infra-structure and software for a future release. One of the features we would like to enable is to have session replication across not only different servers, but ideally across different sites (geographically spread). Is that possible? What are the approaches? For what I have seen so far, to enable session replication, the usual vendor approaches are either one of these: Serializable session attributes < distributable /> tag in the web.xml with additional configuration in

I am evaluating the case of using sticky sessions with Session replication in tomcat. From my initial evaluation, I thought that if we enable Session replication, then session started in one tomcat node will be copied to all other tomcat nodes and thus we do not need sticky session to continue sessions and the request can be picked up by any node. But it seems that session replication is in general used with sticky sessions, otherwise the session id needs to be changed whenever the request goes to some other node. ref: http://tomcat.apache.org/tomcat-6.0-doc/cluster-howto.html#Bind_session

I'm setting up clustering/replication on Tomcat 7 on my local machine, to evaluate it for use with my environment/codebase. Setup I have two identical tomcat servers in sibling directories running on different ports. I have httpd listening on two other ports and connecting to the two tomcat instances as VirtualHosts. I can access and interact with both environments on the configured ports; everything is working as expected. The tomcat servers have clustering enabled like this, in server.xml: <Cluster className="org.apache.catalina.ha.tcp.SimpleTcpCluster" channelSendOptions="8"> <Manager