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Mission critical applications need a database that is always on. While intra-cluster replication helps with server failures giving you high availability, your system still remains at risk from catastrophic failures. You may also need a way to improve the response time for users when they are globally distributed by replicating information closer to them.
Couchbase Server supports cross data center replication (XDCR), providing an easy way to replicate data from one cluster to another for disaster recovery as well as better data locality (getting data closer to the users).
In this paper, we will take a look at how XDCR works in Couchbase and what considerations are important for developers building applications that work with multiple Couchbase Server Clusters connected with XDCR technology.