4.2 Replication in DynaCache
Highly available, load-balanced, WebSphere-based production environments will have several application servers joined together in a cluster. With appropriate HTTP session replication configurations in place, any arriving HTTP client request is serviced by any member of the cluster.
DynaCache also supports data replication. Certain cache entries are highly reusable across users, and shared between servers in a cluster. Configure cache replication to accomplish this. Cache replication is also necessary to ensure that invalidation messages are shared between the servers in a cluster.
Figure 4-7 Workload balancing between multiple servers
Sharing cache content creates some network traffic. To minimize the impact, only replicate valuable content. Controlling what is replicated in the sharing policy section is discussed next.