Configuration Process

Synchronous replication replicates servers from one AZ to another in real time with zero RPO. By leveraging synchronous replication techniques at the storage layer, it allows for cross-AZ disaster recovery and keeps crash consistency for your data. If production site services fail to recover within a short period of time due to force majeure (fire and earthquake) or device faults (software and hardware damage), you can quickly recover services at the disaster recovery site with some simple configurations.

Figure 1 shows the cross-AZ DR configuration process.

When you create a protected instance, the system creates a replication pair for the disks of the servers at the production and DR site by default.

Figure 1 Cross-AZ DR configuration process