NDLI: Trajectory engine: a backend for trajectory sampling

Content Provider	IEEE Xplore Digital Library
Author	Duffield, N.G. Gerber, A. Grossglauser, M.
Copyright Year	2002
Description	Author affiliation: AT&T Labs - Research, Florham Park, NJ, USA (Duffield, N.G.; Gerber, A.; Grossglauser, M.)
Abstract	The management of communication networks increasingly requires detailed knowledge of network usage, acquired by direct measurement. We report on the design and implementation of a backend system for trajectory sampling, a method for consistent sampling of packets across a network domain. This trajectory engine collects trajectory samples and stores them after appropriate preprocessing. It provides a querying and visualization tool to aid in traffic engineering and troubleshooting. We describe the entire system, and in particular the design choices that we took in order to balance the scale of the system (due to large volumes of measured data) with resource usage while providing useful functionality for users. In the preprocessing stage, we focus on reassembly of trajectories from individual samples. We describe the design of the database for efficient storage of trajectories, and its relationship with the query and visualization interface. We test the system using a synthetic stream of trajectory samples derived from configuration and usage data from the network of a major service provider. We walk through several examples that illustrate how a network operator might take advantage of trajectory sampling through such a tool.
Starting Page	437
Ending Page	450
File Size	1140772
Page Count	14
File Format	PDF
ISBN	0780373820
DOI	10.1109/NOMS.2002.1015600
Language	English
Publisher	Institute of Electrical and Electronics Engineers, Inc. (IEEE)
Publisher Date	2002-04-19
Publisher Place	Italy
Access Restriction	Subscribed
Rights Holder	Institute of Electrical and Electronics Engineers, Inc. (IEEE)
Subject Keyword	Engines Sampling methods Data visualization Knowledge management Communication networks Telecommunication traffic Volume measurement Particle measurements Visual databases System testing
Content Type	Text
Resource Type	Article

Sl.	Authority	Responsibilities	Communication Details
1	Ministry of Education (GoI), Department of Higher Education	Sanctioning Authority	https://www.education.gov.in/ict-initiatives
2	Indian Institute of Technology Kharagpur	Host Institute of the Project: The host institute of the project is responsible for providing infrastructure support and hosting the project	https://www.iitkgp.ac.in
3	National Digital Library of India Office, Indian Institute of Technology Kharagpur	The administrative and infrastructural headquarters of the project	Dr. B. Sutradhar bsutra@ndl.gov.in
4	Project PI / Joint PI	Principal Investigator and Joint Principal Investigators of the project	Dr. B. Sutradhar bsutra@ndl.gov.in Prof. Saswat Chakrabarti will be added soon
5	Website/Portal (Helpdesk)	Queries regarding NDLI and its services	support@ndl.gov.in
6	Contents and Copyright Issues	Queries related to content curation and copyright issues	content@ndl.gov.in
7	National Digital Library of India Club (NDLI Club)	Queries related to NDLI Club formation, support, user awareness program, seminar/symposium, collaboration, social media, promotion, and outreach	clubsupport@ndl.gov.in
8	Digital Preservation Centre (DPC)	Assistance with digitizing and archiving copyright-free printed books	dpc@ndl.gov.in
9	IDR Setup or Support	Queries related to establishment and support of Institutional Digital Repository (IDR) and IDR workshops	idr@ndl.gov.in

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