Question 500
During a GPU datacenter maintenance window, an engineer discovers: HPL burn-in succeeds on a 32-node sample and the project accepts the full 512-node pod without assessing shared power or cooling distribution under larger demand. Which repeatable operational safeguard best prevents recurrence of this failure?
Explanation
Correct Answer
This preventive practice addresses the underlying failure (Hardware load and shared facility dependencies behave differently at scale than in a small representative subset.) and supports continued assurance through: The intended cluster scale maintains within-spec power and inlet temperatures and every scheduled host finishes the run.
Incorrect Answers
This prevention control targets another operational risk: A long HPL run fails on the same host every morning, but the report contains no correlated BMC alerts or memory metrics to explain the pattern. The currently reported mechanism remains: Hardware load and shared facility dependencies behave differently at scale than in a small representative subset.
This prevention control targets another operational risk: A data center validates HPL only for a single peak-score run, although the customer requires continuous model training over long maintenance intervals. The currently reported mechanism remains: Hardware load and shared facility dependencies behave differently at scale than in a small representative subset.
This prevention control targets another operational risk: A multi-node cluster passes a ten-second NCCL test but fails after hours of collective communications as one optical link accumulates CRC and FEC errors. The currently reported mechanism remains: Hardware load and shared facility dependencies behave differently at scale than in a small representative subset.