Replication overview
The StorONE system includes a robust and flexible replication solution that can be used for high availability and disaster recovery (DR). You can configure replication at the virtual storage container (VSC) level, giving you maximum flexibility to meet your data availability and DR requirements. All VSC types, including block, file, and object store, can be replicated, in both single-node and high availability (HA) deployments.
StorONE replication supports synchronous, semi-synchronous, and asynchronous replication:
| Replication type | Description |
|---|---|
| Synchronous | Synchronous replication is a real-time data duplication method where data is immediately replicated from a source system to a target system. It ensures strong data consistency by delaying write acknowledgements to the client until data has been written to both the source and target systems. The added latency can impact performance, especially when there is significant latency between the source and target systems. Synchronous replication is typically used when the source and destination systems are on the same low-latency network segment. |
| Asynchronous | Asynchronous replication copies data from a source system to a target system with a time delay. It does not require immediate acknowledgment, allowing the source system to operate without interruptions. While it provides lower latency on the source system, there can be lag time between the source and target systems, resulting in potential data inconsistencies. Asynchronous replication is commonly used when immediate data consistency is not critical or for long-distance replication over high-latency connections. |
| Semisynchronous | Semisynchronous replication combines aspects of synchronous and asynchronous replication. It requires acknowledgment from at least one replica before considering a write operation complete, striking a balance between data consistency and performance. It provides increased data consistency compared to asynchronous replication, but with lower latency impact than fully synchronous replication. |
No Comments