Appranix maps the Availability Zones of the primary region to the recovery region’s two Availability Zones during the recovery process. 


Protected resources in the cloud assembly that are spread across multiple zones in the primary region are mapped to the two zones in the recovery region. Appranix uses a round-robin algorithm for the recovery zone mapping.


For example, Say, us-east-1 is the primary region and has resources spread across six availability zones. Resources in the primary region’s six availability zones are mapped to the two availability zones in the recovery region us-west-1 by Appranix. The available zone selection is based on the round-robin method, as described in the table below



us-east-1a

us-west-1a

us-east-1b

us-west-1b

us-east-1c

us-west-1a

us-east-1d

us-west-1b

us-east-1e

us-west-1a

us-east-1f

us-west-1b



NOTE: 

In the case of the Application Load Balancer and the RDS subnet group, the subnet has to be associated with at least two different zones. If the above round-robin implementation does not meet the requisite during recovery, Appranix will auto-correct the configuration to address the issue case by case.