System Architecture and Reliability
Which is an example of a design based on the fail-soft concept?
- AWhen a failure is detected, the equipment is put into a safe state and stopped
- BOperating procedures and the shapes of parts are designed so that incorrect operation is impossible
- CIn a system where four servers share the processing, when one server fails the remaining three continue processing, though with reduced capacity
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Answer: C. In a system where four servers share the processing, when one server fails the remaining three continue processing, though with reduced capacity
Fail-soft is the idea that when part of a system fails, the failed part is isolated and the system as a whole keeps operating, even with reduced function or performance. Continuing processing on the remaining three servers with reduced capacity when one of four fails is an example. Stopping on the safe side when a failure occurs is fail-safe, and preventing incorrect operation is fool-proofing.
- A. This is the fail-safe concept.
- B. This is the fool-proof concept.
- C. Correct. Processing continues, though with reduced performance.
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