Minimal Rewiring: Efficient Live Expansion for Clos Data Center Networks
summary
Claims a practical, live expansion method for Clos datacenters that avoids packet loss by adding a patch-panel layer and sequencing rewires so controllers steer traffic around changes. Uses integer linear programming with block aggregation (and a faster min-cost-flow decomposition) to minimize jumper moves; evaluates 2,250 synthetic expansions (actually 2,250 per scenario totaling 4,500), solves 99% of cases, changes under 25% of links, and cuts average stages to 1.29 from four.
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chapters (7)
- 0:00Introduction to Clos topology
- 1:31Expansion challenges
- 3:49Proposed patch panel architecture
- 5:56Live expansion pipeline
- 8:48Optimization algorithm
- 11:51Performance evaluation
- 19:08Conclusion and Q&A
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