Bi-directional replication with Elasticsearch cross-cluster replication (CCR)
Elasticsearch cross-cluster replication (CCR) was released as a beta feature in Elasticsearch 6.5, and as a Generally Available (GA) feature in Elasticsearch 6.7. CCR allows multiple indices to be replicated to one or more Elasticsearch clusters. Replicating indices to additional Elasticsearch clusters solves several use cases, including high availability (HA) across datacenters, disaster recovery (DR), and CDN-like architectures to co-locate data closer to application servers (and users).