NDLI: A Ping Too Far: Real World Network Latency Measurement

Content Provider	IEEE Xplore Digital Library
Author	Jackson, G. Keleher, P. Sussman, A.
Copyright Year	2015
Description	Author affiliation: Appl. Phys. Lab., Johns Hopkins Univ., Laurel, MD, USA (Jackson, G.) \|\| Dept. of Comput. Sci., Univ. of Maryland, College Park, MD, USA (Keleher, P.; Sussman, A.)
Abstract	There is risk when doing experiments on real world systems and making real world measurements. In a theoretical system, a simulation, or a test bed, we can make assumptions about real world behaviors and gloss over potential problems. In a real world system, however, we have to solve those problems to get science done. Sometimes these are technical problems, like making sure a tool chain is consistent across many hosts. Sometimes these are policy problems, such as obtaining permission and access. The other users of a system have a reasonable expectation that their work will not be disrupted, so researchers studying those systems must be careful accommodate that expectation. Sometimes, systems researchers encounter these problems and a study must be changed or canceled, though the problem may have nothing to do with the study itself. Our goal was to make a high-quality all-to-all network latency map that captures features not present in existing latency data sets. We solved most of the technical problems needed to make the required measurements. We solved most policy problems too, often with complex technical solutions to get around a policy obstacle without creating disruptions. However, we eventually ran out of technical solutions: we ran afoul of a policy obstacle to a technical solution to a technical problem. There is no one to blame, and no one has done anything obviously wrong: the policy decision was a conservative one designed to protect the data of the regular users of the system. Although our resulting latency data set is not complete, we believe it still has value for various network applications. Our goal was to make a high-quality all-to-all network latency map that captures features not present in existing latency data sets. We solved most of the technical problems needed to make the required measurements. We solved most policy problems too, often with complex technical solutions to get around a policy obstacle without creating disruptions. However, we eventually ran out of technical solutions: we ran afoul of a policy obstacle to a technical solution to a technical problem. There is no one to blame, and no one has done anything obviously wrong: the policy decision was a conservative one designed to protect the data of the regular users of the system. Although our resulting latency data set is not complete, we believe it still has value for various network applications.
Starting Page	580
Ending Page	588
File Size	227484
Page Count	9
File Format	PDF
ISBN	9781467393256
DOI	10.1109/eScience.2015.74
Language	English
Publisher	Institute of Electrical and Electronics Engineers, Inc. (IEEE)
Publisher Date	2015-08-31
Publisher Place	Germany
Access Restriction	Subscribed
Rights Holder	Institute of Electrical and Electronics Engineers, Inc. (IEEE)
Subject Keyword	Torque ping latency Extraterrestrial measurements Time measurement Peer-to-peer computing Internet measurement latency estimation Message systems latency prediction
Content Type	Text
Resource Type	Article

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