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session replication

ranjan samal
Greenhorn

Joined: Apr 10, 2009
Posts: 1
i have some question regarding session replication in a clustered environment..

i am doing a poc on session replication in a clustered environment

1.how session replication happens ?
2.in a two server cluster server 1 and server2
when server 1 is down all its session is replicated to server 2 which is active..
is the replicated session comes back when the server 1 is active again?
3.is there any way we can find out which server currently serves the request for information purpose?

thnks
samal
Hareesh Ram Chanchali
Ranch Hand

Joined: Jan 31, 2005
Posts: 110
Hi Samal,

Using in-memory replication, WebLogic Server copies a session state from one server instance to another. The primary server creates a primary session state on the server to which the client first connects, and a secondary replica on another WebLogic Server instance in the cluster. The replica is kept up-to-date so that it may be used if the server that hosts the servlet fails.

(from docs) read more at


http://download.oracle.com/docs/cd/E11035_01/wls100/cluster/failover.html#wp1022034


ALso the flow chart at the end gives you good idea of Failover with proxy plug-in


http://download.oracle.com/docs/cd/E11035_01/wls100/plugins/nsapi.html


Hareesh Ram Chanchali
SCJP 5.0, IBM Certified Solution Designer
 
With a little knowledge, a cast iron skillet is non-stick and lasts a lifetime.
 
subject: session replication