Topology Notes

Topology dictates congestion behavior. Record how your fabric is wired.

Example topology factors

• Fat-tree vs. dragonfly
• Shared rails or multi-rail routing
• Rack-level oversubscription ratios

Diagnostic hints

• Compare intra-rack vs. inter-rack latency deltas.
• Check whether collective performance aligns with topology expectations.
• Note any hop-count or routing asymmetry.