On the efficacy of fine-grained traffic splitting protocolsin data center networks
| Autor: | Pawan Prakash, Ramana Rao Kompella, Advait Dixit |
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| Rok vydání: | 2011 |
| Předmět: |
Traverse
Network packet business.industry Computer science Computer Networks and Communications Distributed computing ComputerSystemsOrganization_COMPUTER-COMMUNICATIONNETWORKS Context (language use) Throughput Network topology Tree (data structure) Routing (electronic design automation) business Queue Multipath propagation Software Computer network |
| Zdroj: | SIGCOMM |
| ISSN: | 0146-4833 |
| DOI: | 10.1145/2043164.2018504 |
| Popis: | Multi-rooted tree topologies are commonly used to construct high-bandwidth data center network fabrics. In these networks, switches typically rely on equal-cost multipath (ECMP) routing techniques to split traffic across multiple paths, such that packets within a flow traverse the same end-to-end path. Unfortunately, since ECMP splits traffic based on flow-granularity, it can cause load imbalance across paths resulting in poor utilization of network resources. More fine-grained traffic splitting techniques are typically not preferred because they can cause packet reordering that can, according to conventional wisdom, lead to severe TCP throughput degradation. In this work, we revisit this fact in the context of regular data center topologies such as fat-tree architectures. We argue that packet-level traffic splitting, where packets of a flow are sprayed through all available paths, would lead to a better load-balanced network, which in turn leads to significantly more balanced queues and much higher throughput compared to ECMP. |
| Databáze: | OpenAIRE |
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