Indentify two requirements for in-memory session replication.
A.
Clusters must contain an even number of members.
B.
Web applications must be configured to use replication.
C.
Web applications must be deployed as an archive file.
D.
Cluster members must be started by using the Node Manager.
E.
Web applications must be accessed via a proxy that supports session cookies
Explanation:
B: When in-memory replication is enabled for a web application, WebLogic Server
copies session state from one server in the cluster (primary) to one other server in the same
cluster (secondary). The replica on the secondary server is kept up-to-date so that it may be used
if the primary server fails.E: To utilize in-memory replication for HTTP session states, you must access the WebLogic
Server cluster using either a collection of Web servers with identically configured WebLogic proxy
plug-ins, or load balancing hardware.
If you choose to use load balancing hardware instead of a proxy plug-in, it must support a
compatible passive or active cookie persistence mechanism, and SSL persistence.
Note 1: In its default configuration, WebLogic Server uses client-side cookies to keep track of the
primary and secondary server that host the client’s servlet session state. If client browsers have
disabled cookie usage, WebLogic Server can also keep track of primary and secondary servers
using URL rewriting. With URL rewriting, both locations of the client session state are embedded
into the URLs passed between the client and proxy server. To support this feature, you must
ensure that URL rewriting is enabled on the WebLogic Server cluster.
Note 2: To support automatic failover for servlet and JSP HTTP session states, WebLogic Server
replicates the session state in memory. WebLogic 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. The process of copying a session state from one server instance to another is
called in-memory replication.
Reference: eDocs Home > BEA WebLogic Server 8.1 Documentation > Using WebLogic Server
Clusters > Failover and Replication in a Cluster, Failover and Replication in a Cluster