Measuring load-balanced paths in the internet
Proceedings of the 7th ACM SIGCOMM conference on Internet measurement
VL2: a scalable and flexible data center network
Proceedings of the ACM SIGCOMM 2009 conference on Data communication
Measurement lab: overview and an invitation to the research community
ACM SIGCOMM Computer Communication Review
SPAIN: COTS data-center Ethernet for multipathing over arbitrary topologies
NSDI'10 Proceedings of the 7th USENIX conference on Networked systems design and implementation
Quantifying violations of destination-based forwarding on the internet
Proceedings of the 2012 ACM conference on Internet measurement conference
Revisiting flow-based load balancing: Stateless path selection in data center networks
Computer Networks: The International Journal of Computer and Telecommunications Networking
Mapping the expansion of Google's serving infrastructure
Proceedings of the 2013 conference on Internet measurement conference
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Monitoring Internet performance and measuring user quality of experience are drawing increased attention from both research and industry. To match this interest, large-scale measurement infrastructures have been constructed. We believe that this effort must be combined with a critical review and calibrarion of the tools being used to measure performance. In this paper, we analyze the suitability of ping for delay measurement. By performing several experiments on different source and destination pairs, we found cases in which ping gave very poor estimates of delay and jitter as they might be experienced by an application. In those cases, delay was heavily dependent on the flow identifier, even if only one IP path was used. For accurate delay measurement we propose to replace the ping tool with an adaptation of paris-traceroute which supports delay and jitter estimation, without being biased by per-flow network load balancing.