Utilization of Latency Measurements for Network-Based Applications

Utilization of Latency Measurements for Network-Based Applications

Mohammed Jubaer Arif (The University of Melbourne, Australia)
DOI: 10.4018/978-1-61350-110-8.ch004
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Distributed computing, comprised of different components of an application located on different computers connected via network, has allowed value added services to provide enhanced user experience. Offering information based on geographic location of users of a distributed system is one of the newest and most notable advancements. Internet is the biggest distributed system present today, and finding the geographical location of the user on the Internet, commonly referred to as geolocation, is one of the challenging problems currently addressed by the research community. Of the two commonly used approaches, repository-based and measurement-based, this chapter primarily focuses on geolocating Internet hosts using the measurement-based approach. A measurement-based geolocation approach is based on the latency measurements between the distributed Internet nodes. Thus, this chapter conducts a systematic analysis of latency measurements between the Internet nodes. This chapter recognizes the importance of geolocation in distributed computing. As a result, it also presents a comparative study of existing repository-based and measurement-based geolocation approaches.
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Motivation And Scope

Latency refers to the delays of any kind incurred in processing and travelling of network data between Internet hosts. A low latency network is one that generally experiences small delays in time and a high latency network generally suffers from long delays. Internet is the combination of all such small and long delay networks. Thus, utilization of latency for the benefits of distributed Internet technologies requires systematic analysis of latency measurements.

There are many usages of latency measurements for distributed Internet technologies. However, this chapter highlights the utilization of latency measurements in terms of host geolocation on the Internet. It identifies few key issues that make the study of Internet latency a challenging one. An important research problem that is addressed in this chapter is the analysis of a latency dataset that is collected from real Internet hosts. Such analysis helps to model the latency to distance relationship between Internet hosts.

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