Question 320
During a regional deployment expansion at a media technology business, engineers report the following issue: A cluster is scaled based only on total accelerator count without testing communication. The affected work supports language and visual-content AI services; different workloads compete for shared acceleration and storage. Which TWO responses form the best remediation-and-evidence pair? (Select TWO.)
Explanation
Correct Answers
Correct corrective action. Plan multiple accelerator nodes with a suitable high-bandwidth low-latency network and distributed training communications, then measure scaling efficiency. This fits the specific reported issue: A cluster is scaled based only on total accelerator count without testing communication. The corresponding failure being reduced is: Adding nodes without adequate east-west fabric and communication strategy can reduce useful training efficiency and increase step time.
Correct independent evidence. A multi-node training test records throughput and collective communication time before and after adding nodes. This verifies the corrective approach for the affected language and visual-content AI services instead of treating an architecture diagram alone as success.
Incorrect Answers
Not the most direct the action-and-evidence pair for these facts. Compare public-cloud GPU elasticity, service availability, transfer cost and operating expense with owned cluster utilization and lifecycle cost before choosing placement. This choice concerns cloud elasticity versus on-prem capacity tradeoffs and may be valid in another design. But this case reports 'A cluster is scaled based only on total accelerator count without testing communication', which calls for reasoning about scale-out cluster design and distributed communication. The targeted response is: Plan multiple accelerator nodes with a suitable high-bandwidth low-latency network and distributed training communications, then measure scaling efficiency.
Not the most direct the action-and-evidence pair for these facts. Identify NVLink and NVSwitch as high-bandwidth GPU-to-GPU connectivity choices for supported scale-up platforms and match the topology to communication-intensive jobs. This choice concerns scale-up gpu interconnects within an accelerated system and may be valid in another design. But this case reports 'A cluster is scaled based only on total accelerator count without testing communication', which calls for reasoning about scale-out cluster design and distributed communication. The targeted response is: Plan multiple accelerator nodes with a suitable high-bandwidth low-latency network and distributed training communications, then measure scaling efficiency.
Not the most direct the action-and-evidence pair for these facts. A supported RDMA path passes connectivity and performance checks and demonstrates the intended transport rather than a TCP fallback. This choice concerns rdma direct memory transport concepts and may be valid in another design. But this case reports 'A cluster is scaled based only on total accelerator count without testing communication', which calls for reasoning about scale-out cluster design and distributed communication. The targeted response is: Plan multiple accelerator nodes with a suitable high-bandwidth low-latency network and distributed training communications, then measure scaling efficiency.