Replication and failover in clusters

recommended readings:

http://e-docs.bea.com/wls/docs81/cluster/failover.html

http://e-docs.bea.com/wls/docs81/cluster/load_balancing.html

http://e-docs.bea.com/platform/docs81/deploy/loadbal.html

http://edocs.bea.com/wls/docs100/cluster/setup.html
( http://e-docs.bea.com/wls/docs81/cluster/setup.html )

http://e-docs.bea.com/wls/docs81/cluster/planning.html

http://e-docs.bea.com/wls/docs81/webapp/sessions.html