Refer to the Exhibit
Scenario : A multi-cluster architecture, with two geographically separated clusters (WAN-1 and
WAN-2), is being created. It will provide cross-cluster WAN HTTP session failover. The WAN-1
cluster is located in London and the WAN-2 cluster is located in New York and is connected via a
slow interconnect. The client request passes through a Global load balancer which load balances
the request to local load balancers
which eventually pass the load to WebLogic Server instances in the cluster. Four WebLogic
Server instances will be running on each cluster distributed on two physical machines, two
WebLogic instances per physical machine. A database is configured on each cluster for HTTP
Session state failover between the clusters.
What would be the characteristics of the above WAN Cluster for optimal performance and
scalability?
A.
High network latency, asynchronous persistent replication between WAN-1 and WAN-2,
synchronous intra-cluster replication and cross-cluster replication via in-memory, JDBC or file
persistence.
B.
Fast network, synchronous persistent replication between WAN-1 and WAN-2, asynchronous
replication intra-cluster and cross-cluster replication via file persistence.
C.
High network latency, asynchronous persistent replication between WAN-1 and WAN-2,
synchronous intra-cluster replication and cross-cluster replication via JDBC
D.
Low network latency, asynchronous persistent replication between WAN-1 and WAN-2, no
intra-cluster replication and cross-cluster replication via JDBC
E.
Fast network, synchronous persistent replication between WAN-1 and WAN-2, asynchronous
intra-cluster replication and cross-cluster replication via cookie persistence.