OpenSearch® cross-cluster replication Limited availability
Cross-cluster replication (CCR) in Aiven for OpenSearch allows you to replicate an entire cluster, including all indexes, mappings, and metadata, from one service to another across different regions and cloud providers.
This is an active-passive model, where the follower service pulls all data and
indexes from the leader service. Once you have a
cross-cluster replication setup, the leader cluster automatically
replicates data to all follower clusters. Follower clusters can be set up in various
regions and on different cloud providers, ensuring that all index creation, deletion,
new data entries, metadata, and configurations are replicated automatically.
Benefits
- Data locality/proximity: Replicating data to a cluster closer to the user's geographical location helps reduce latency and response time.
- Horizontal scalability: Splits a query-heavy workload across multiple replica clusters to improve application availability.
Limitations
- Cross cluster replication is not available for Hobbyist and Startup plans.
- During creation, the follower cluster service must have the same service plan as the leader cluster service. This ensures the follower cluster service has as much memory as the leader cluster. Service plans can be changed later as needed.
- To delete the cross-cluster replication integration, delete the follower cluster service.
- Maintenance upgrade and major version upgrades must be performed manually on leader and follower services.
- During a node recycle event, replication will pause until the service is operational again.