Cache replication
The cache replication mechanism allows data to be generated once and then be copied or replicated to other servers in the cluster, thus saving execution time and resources. Caching in a cluster has additional concerns. In particular, the same data could be required and hence be generated in multiple places. Also, the access to resources needed to generate the cached data can be restricted, preventing access to the data.
Cache replication also aids in cache consistency. If the cache entry is invalidated from one server, the invalidation is propagated to all servers.
The replication support uses a built-in high performance standard-based JMS messaging system as its underlying engine for data replication.
We continue to work with the redbook sample infrastructure, now configured for cache replication (Figure 14-22).
Figure 14-22 Redbook caching replication infrastructure
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