Disaster recovery solutions ensure the high availability of enterprise data and services by combining disaster recovery with data backup. Disaster recovery protection levels are classified by risk and RTO/RPO.
Key technical indicators
- Recovery time objective (RTO): The period of time within which IT systems and services must be restored after an outage. RTO indicates the timeliness of service recovery, that is, the maximum recovery time for IT systems that enterprises can tolerate. A smaller RTO indicates a higher disaster recovery capability, but requires a higher enterprise investment.
- Recovery point objective (RPO): The point in time to which data is restored by the disaster recovery system after an outage. RPO indicates the amount of data loss, that is, the maximum amount of data loss that enterprises can tolerate. A smaller RPO indicates less data loss and less harm to the enterprise.
Disaster recovery protection levels
|Protection level||Data backup||Measure||Preventable risk||RTO||RPO|
|Level 1: Basic support||
||-||The service data is damaged.||Two days or more||One to seven days|
|Level 2: Secondary site support||
||Backups are called after an outage.||
||24 hours or more||One to seven days|
|Level 3: Electronic transmission and partial device support||
||Backups are provided for some data processing devices.||
||12 hours or more||Several hours to one day|
|Level 4: Electronic transmission and full device support||
||Backups are provided for all devices in the available status (cold site).||
||Several hours to two days||Several hours to one day|
|Level 5: Real-time data transmission and full device support||
||Backups are provided for all devices in the ready or running status (warm site).||
||Several minutes to two days||0 to 30 minutes|
|Level 6: Zero data loss and remote cluster support||
Key factors for disaster recovery
The core aim of a disaster recovery solution is to help enterprises balance the needs of RTO and RPO and find the optimal technologies and means of implementation. From an economic perspective, the solution helps enterprises optimize their Total Cost of Ownership (TCO) and Return on Investment (ROI).