Moving Beyond the Synchronous vs. Asynchronous Database Replication Binary
The Old Paradigm: Asynchronous vs. Synchronous Database Replication
When disaster strikes, the ideal disaster recovery scenario is zero data loss and near-zero recovery time; in technical terms, that means is near-zero. Although asynchronous database replication and synchronous database replication have long been the “go-to” solutions for disaster recovery and business continuity, neither of these solutions alone can guarantee these objectives will be met.
Data loss. With asynchronous database replication, an inherent lag exists between the data in the primary site and the data in the disaster recovery site. Without this lag is usually unprotected, potentially leading to the loss of transaction data if disaster strikes. Synchronous replication topologies are also vulnerable. Because synchronous replication requires the primary site and disaster recovery site to be geographically close to one another, regional disasters or rolling outages can interrupt synchronous replication, resulting in the loss of valuable data.
Recovery time. When transaction data is lost, data consistency across databases and applications may also be lost. In this case, disaster recovery entails a laborious, time-consuming process of determining what data has been lost and reconstructing application consistency. The longer that recovery and the return to normal operations is delayed—that is, the longer the downtime—the greater the impact to the organization.
The New Paradigm: Zero Data Loss Regardless of Database Replication Topology
Given these challenges, business continuity planning has often involved ongoing compromises related to data loss and recovery time, as well as significant investments in database replication topologies that afford the best balance between cost and risk.
Many organizations simply consider some amount of data loss to be inevitable during a disaster. With Axxana Phoenix, organizations no longer have to tolerate a single byte of data loss. Axxana Phoenix uses the disaster-proof Black Box and an intelligent operating system to protect data lag (not-yet-replicated data) during a disaster and safely transfer the data during recovery. This innovative technology complements your existing disaster recovery topology to ensure zero data loss and rapid recovery time.
Click here for examples of how you can use Axxana Phoenix to solve disaster recovery challenges within your own organization.