NCP-MCI-6.10 · Question #130
In Prism Element, how many nodes can be placed into maintenance mode at one time on 12- node FT2 cluster?
The correct answer is A. 1. On a 12-node FT2 cluster in Prism Element, only 1 node can be placed into maintenance mode at a time to preserve cluster resiliency and fault tolerance headroom.
Question
In Prism Element, how many nodes can be placed into maintenance mode at one time on 12- node FT2 cluster?
Options
- A1
- B2
- C3
- D4
How the community answered
(20 responses)- A90% (18)
- B5% (1)
- D5% (1)
Why each option
On a 12-node FT2 cluster in Prism Element, only 1 node can be placed into maintenance mode at a time to preserve cluster resiliency and fault tolerance headroom.
Prism Element enforces a limit of 1 node in maintenance mode at a time on an FT2 cluster; placing more than one node in maintenance mode simultaneously would reduce available fault tolerance below the required threshold, risking data unavailability if an additional failure occurred.
Allowing 2 nodes in maintenance mode simultaneously on an FT2 cluster would exhaust the cluster's fault tolerance capacity, leaving no headroom for unexpected failures.
3 nodes in maintenance mode would exceed the FT2 tolerance limit and is not permitted by Prism Element.
4 nodes in maintenance mode is far beyond what any FT2 cluster can safely support and is not allowed.
Concept tested: FT2 cluster maintenance mode node limit in Prism Element
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