Administration Guide › How CA Directory Works › The Backbone Concept in DXmanager › How DXmanager Uses the Topology to Configure the Backbone › Regions and Replication

Regions and Replication

DXmanager automatically configures multiwrite replication between DSAs that serve the same namespace partition, by putting them in the same multiwrite group.

• Replication within a region

  This occurs synchronously. When a DSA receives an update request, it replicates it synchronously to all other DSAs in the same region.

• Replication between regions

  This occurs asynchronously. When a DSA receives an update request, it replicates it asynchronously to one DSA in each other region. The receiving DSAs then forward the request to other DSAs in the same region.

  This 'send and forward' model reduces the network traffic between refgions.

  For the application that sent the update request, this means that it waits only until the DSAs in the same region have applied the update.

  Note: DSAs in different regions might be briefly inconsistent with each other.