• Computer Science > Networking and Internet Architecture [Submitted on 16 Jul 2025 (v1), last revised 24 Feb 2026 (this version, v2)] Title:FastReChain: A Novel Bidirectional Model-Based Algorithm for Topology Engineering of OCS-Based Clusters View PDF HTML (experimental)Abstract:Optical Circuit Switching (OCS) technology is increasingly being adopted in data centers due to its advantages of low power consumption and low technology refresh costs. • Unlike electrical packet switches, OCS provides programmable bandwidth for directly connected devices by configuring the mapping relationships of internal ports. • Thus, how to calculate these internal port mapping relationships, i.e., Topology Engineering (ToE), is one of the key designs of OCS-based clusters. • Current deployments usually design ToE algorithms by solving Integer Linear Programming (ILP) models, with the aim of minimizing modifications to links occupied by running tasks as much as possible. • However, ILP-based ToE algorithms may incur excessive runtime overhead in large-scale clusters. • Some existing ToE algorithms convert the ILP model into a Minimum-Cost Flow model through greedy construction, yet such greedy strategies may increase the number of affected links during the OCS reconfiguration process.

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  • Computer Science > Networking and Internet Architecture [Submitted on 16 Jul 2025 (v1), last revised 24 Feb 2026 (this version, v2)] Title:FastReChain: A Novel Bidirectional Model-Based Algorithm for Topology Engineering of OCS-Based Clusters View PDF HTML (experimental)Abstract:Optical Circuit Switching (OCS) technology is increasingly being adopted in data centers due to its advantages of low power consumption and low technology refresh costs. Unlike electrical packet switches, OCS provides programmable bandwidth for directly connected devices by configuring the mapping relationships of inte

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