Question 750
At the Whitford medical imaging research center, after moving the service into a shared cluster, a distributed GPU job completes bulk downloads quickly but suffers long synchronization pauses across its inter-node fabric. What is the primary reason this approach is unreliable?
Explanation
Correct Answer
The issue is not simply a failed task; high peak throughput alone does not guarantee low collective-communication latency. That is why the practical change is to evaluate latency and congestion characteristics for small frequent collective messages alongside bulk bandwidth. This directly addresses the reported issue at the Whitford medical imaging research center.
Incorrect Answers
That statement concerns east-west traffic separation; here the reported facts point to a different issue: high peak throughput alone does not guarantee low collective-communication latency. For the Whitford medical imaging research center, the priority is to evaluate latency and congestion characteristics for small frequent collective messages alongside bulk bandwidth.
Longer larger jobs increase exposure to node faults and require operational recovery design. This can occur in other projects, but it is not the primary explanation at the Whitford medical imaging research center.
This explanation belongs to storage fabric versus compute fabric. The immediate weakness in the question is that high peak throughput alone does not guarantee low collective-communication latency. For the Whitford medical imaging research center, the priority is to evaluate latency and congestion characteristics for small frequent collective messages alongside bulk bandwidth.