Advances, Systems and Applications
Table 2 Metrics for HA evaluation from [8]
From: High availability in clouds: systematic review and research challenges
Metric | Definition |
|---|---|
Reaction time | Delay between the occurrence of the failure and the first reaction of the availability management solution. |
Repair time | Duration from the first reaction until the faulty entity is repaired. |
Recovery time | Duration from the first reaction until the service is provided again |
Outage time | Time between the failure happening and the service recovery. In other words, outage time is the amount of time the service is not provided and it is the sum of the reaction and recovery times. |