Abstract

Distributed computing systems require accurate network simulation tools to optimize data transfer and resource allocation across geographically distributed facilities. We extend DISTRI, a discrete-event simulator for multi-facility distributed computing, with a comprehensive Transmission Control Protocol (TCP) stack supporting multiple congestion control algorithms (CCAs) and network topologies. This unified TCP implementation enables realistic simulation of both inter-facility wide-area and intra-facility local network communications. We validate DISTRI’s TCP stack accuracy by comparing inter-facility scenarios against real-world experiments on the FABRIC testbed. Using a dumbbell topology with competing data transfers, we analyze TCP Reno’s behavior through congestion window (CWND) evolution, round-trip time (RTT), throughput, and packet loss patterns. Results demonstrate that DISTRI accurately …

Date

2026

Authors

Imtiaz Mahmud, Kesheng Wu, Alex Sim, Anirban Mandal, Ewa Deelman

Conference

2026 International Conference on Computing, Networking and Communications (ICNC)

Pages

832-837

Publisher

IEEE