3V0-21.23 · Question #176
An architect is documenting the design for a new multi-site vSphere solution. The customer has informed the architect that the workloads hosted on the solution are managed by application teams, who…
The correct answer is A. Critical Workloads: 13 hours. The Maximum Tolerable Downtime (MTD) is the maximum time that an application or system can be unavailable before it negatively impacts the business. The MTD is calculated by adding the Recovery Time Objective (RTO) to the Work Recovery Time (WRT). Critical Workloads: - RTO: 1…
Question
An architect is documenting the design for a new multi-site vSphere solution. The customer has informed the architect that the workloads hosted on the solution are managed by application teams, who must perform a number of steps to return the application to service following a failover of the workloads to the secondary site. These steps are defined as the Work Recovery Time (WRT). The customer has provided the architect with the following information about the workloads:
- Critical workloads have a WRT of 12 hours
- Production workloads have a WRT of 24 hours
- Development workloads have a WRT of 24 hours
- All workloads have an RPO of 4 hours
- Critical workloads have an RTO of 1 hour
- Production workloads have an RTO of 12 hours
- Development workloads have an RTO of 24 hours
The customer has also confirmed that the Disaster Recovery solution will not begin the recovery of the development workloads until all critical and production workloads have been recovered at the secondary site. What would the architect document as the maximum tolerable downtime (MTD) for each type of workload in the design?
Options
- ACritical Workloads: 13 hours
- BCritical Workloads: 13 hours
- CCritical Workloads: 12 hours
- DCritical Workloads: 16 hours
How the community answered
(48 responses)- A71% (34)
- B17% (8)
- C8% (4)
- D4% (2)
Explanation
The Maximum Tolerable Downtime (MTD) is the maximum time that an application or system can be unavailable before it negatively impacts the business. The MTD is calculated by adding the Recovery Time Objective (RTO) to the Work Recovery Time (WRT). Critical Workloads: - RTO: 1 hour (time to restore the system to a usable state after failure). - WRT: 12 hours (the time to get the application fully back to service). - MTD = RTO + WRT = 1 hour + 12 hours = 13 hours. Production Workloads: - RTO: 12 hours (time to restore the system to a usable state after failure). - WRT: 24 hours (time to get the application fully back to service). - MTD = RTO + WRT = 12 hours + 24 hours = 36 hours. Development Workloads: - RTO: 24 hours (time to restore the system to a usable state after failure). - WRT: 24 hours (time to get the application fully back to service). - MTD = RTO + WRT = 24 hours + 24 hours = 48 hours.
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