Question 440
During a regulated deployment assessment at a healthcare imaging provider, engineers report the following issue: A multi-node job hangs when many workers simultaneously send model updates. The affected work supports clinical imaging and model-assisted workflows; patient data constraints and reliable model performance are important. Which TWO responses form the best remediation-and-evidence pair? (Select TWO.)
Explanation
Correct Answers
Correct corrective action. Size east-west bandwidth, latency and oversubscription for distributed GPU training based on communication patterns rather than only user-facing north-south traffic. This fits the specific reported issue: A multi-node job hangs when many workers simultaneously send model updates. The corresponding failure being reduced is: An ordinary enterprise access network can become the bottleneck for GPU collectives and synchronized training.
Correct independent evidence. Under representative concurrency, network counters and collective benchmarks show acceptable throughput, latency and congestion. This verifies the corrective approach for the affected clinical imaging and model-assisted workflows instead of treating an architecture diagram alone as success.
Incorrect Answers
Not the most direct the action-and-evidence pair for these facts. A congested multi-flow test checks RDMA throughput and loss or congestion telemetry against the required service target. This choice concerns roce congestion and loss-management considerations and may be valid in another design. But this case reports 'A multi-node job hangs when many workers simultaneously send model updates', which calls for reasoning about east-west ai data center network requirements. The targeted response is: Size east-west bandwidth, latency and oversubscription for distributed GPU training based on communication patterns rather than only user-facing north-south traffic.
Not the most direct the action-and-evidence pair for these facts. Separate out-of-band host and switch management from high-volume AI workload traffic and restrict access to authorized operators. This choice concerns management network isolation and access and may be valid in another design. But this case reports 'A multi-node job hangs when many workers simultaneously send model updates', which calls for reasoning about east-west ai data center network requirements. The targeted response is: Size east-west bandwidth, latency and oversubscription for distributed GPU training based on communication patterns rather than only user-facing north-south traffic.
Not the most direct the action-and-evidence pair for these facts. Associate a BlueField DPU with offloading selected networking, storage and security infrastructure work from host CPUs while meeting supported deployment constraints. This choice concerns bluefield dpu infrastructure offload and may be valid in another design. But this case reports 'A multi-node job hangs when many workers simultaneously send model updates', which calls for reasoning about east-west ai data center network requirements. The targeted response is: Size east-west bandwidth, latency and oversubscription for distributed GPU training based on communication patterns rather than only user-facing north-south traffic.