Unidirectional mode replicates data in one direction only, from Master to Replica, and is used for active-passive deployments such as disaster recovery.Unidirectional mode replicates data in one direction only, from Master to Replica, and is used for active-passive deployments such as disaster recovery.Bidirectional mode replicates data in two directions, from Master to Replica and from Replica to Master, and is used for active-active deployments where updates from more than one region should be incorporated into the Master cache's authoritative data set. Please review the section
Bidirectional WAN Replication for an understanding of limitations.Unidirectional Replication | Bidirectional Replication |
Active-Passive deployment | Active-Active deployment |
The Master cache replicates cache element modifications to the Replica caches | Both Master and Replica caches replicate cache element modifications |
Replica caches operate locally but do not replicate cache element modifications | The Master cache receives replications from the Replica caches |
The Master cache maintains the authoritative data set but no element tracking is necessary | The Master cache tracks each cache element and maintains the authoritative data set |
No conflict resolution necessary | Conflict resolution (localized updates strongly recommended) |
Example use case: disaster recovery | Example use case: regional operations |