A Disaster Recovery (DR) plan defines the following:
AWS account: The account in AWS that acts as a secondary site for Phoenix DRaaS. The account maintains the DR copies for the virtual machines. At the time of disaster, you can launch EC2 instances from these DR copies, in-turn spinning up to production in minutes.
AWS region: The storage region where you want to create DR copies for the virtual machines. The region of the DR plan and region of the storage to which the virtual machine is backing the data to must be same.
Replication frequency: The frequency at which Phoenix updates the DR copy. Based on the defined frequency, on each schedule, the existing DR copy, if present, is replaced with a DR copy based on the latest restore point available for the virtual machine.
Note: If you have deployed the Phoenix AWS Proxy with version 4.7.6 or earlier, the replication frequency defines the frequency at which Phoenix updates the AMI. Based on the defined frequency, on each schedule, the existing AMI, if present, is replaced with an AMI based on the latest restore point available for the virtual machine.
In other words, the DR plan encompasses the virtual machines configured for disaster recovery, the AWS account used for disaster recovery, the replication frequency, and the network, security and instance-related failover settings such as VPC, subnet, IP addresses, security group, and instance type. Preconfiguration of these settings in the DR plan allows for a single-click failover in the event of a disaster. On failover, based on the latest DR copy and failover settings, an EC2 instance is launched in the AWS account.