Index replication support has been added to improve high availability and manageability of indexes. XDCR helps protect against datacenter failures and also helps maintain data locality in globally distributed mission-critical applications.

Using the cross datacenter replication (XDCR) capability, you can set up replication of data between clusters. In the event of failure of a single node, this ensures that data is still available on other nodes that can provide full read and write ability to the applications. Intra-cluster replication involves replicas that are placed on another node in the same cluster. Couchbase Server provides high availability for reading and writing of data through a variety of features. Couchbase provides high availability using intra-cluster replication and index replication, and disaster recovery using cross datacenter replication (XDCR).