During a requirements gathering workshop, the customer provides the following requirement that is pertinent to the design of a new vSphere environment:
✑ The Maximum Tolerable Downtime (MTD) for all Tier 1 applications is one hour.
Which requirement classification is being gathered for the design documentation?
The requirement regarding Maximum Tolerable Downtime (MTD) falls under the classification of recoverability. MTD is specifically a measure used to determine the maximum amount of time an organization can tolerate the downtime of a system or application before significant negative impact occurs. It is closely related to recovery objectives such as Recovery Time Objective (RTO) and Recovery Point Objective (RPO), which are all part of recoverability. Therefore, the classification being gathered for the design documentation is recoverability.
D - Recoverability
Question to everybody saying D - How is "availability" defined? It's defined via the maximum downtime of something - no matter if it needs to be recovered or ist simply taken offline for maintenance. An availability of 99,9% means a maximum downtime of 0,1%.
MTD, RTO & RPO are Recoverability measurement
Based on the official book MTD is non functional requirement for Recoverability
Recoverability | Easy to restore after an outage | MTD, RTO, RPO (from official course documentation page 31)
It's D -Recoverability, MTD – Maximum Tolerable Downtime: Sum of the RTO and WRT, which is the total time required to recover from a disaster and start serving the business again. https://vcdx133.com/2015/01/28/vcdx-availability-explained/
Answer is D - Recoverability. MTD is part of Recoverability.
D. Recoverability They measure the Recoverability in MTD. Key item to note there. Availability is measured vai Redundancy (N+1) or SLA (Class of Nines)
D - Recoverability 100% sure
I say C is correct. Nothing in the question states that the service has to be recovered. It simply states that it can't be down for more than an hour. Think Maintenance windows. Can't be down for more than 1 hour for patching, upgrades, etc...
Curious if MTD is actually availability or recoverability.
ignore this. It's recoverability.
The MTD (also know as MAD), is linked to recovery, not availability. Interesting articles that details that with examples : https://tandem.app/blog/what-is-the-difference-between-rpo-rto-mtd
D - it is NFR-Recoverability = anytime it mentions MTD, RTO or RPO
C. Availability
its C The Maximum Tolerable Downtime (MTD) specifies the maximum duration that a system or application can be unavailable or inoperable without causing significant negative impact. here, the requirement states that the MTD for all Tier 1 applications is one hour, so its C. Availability
D - Recoverability Easy to restore after an outage Measures: MTD, RTO, RPO
As per page 31 on design book it s recoverability