NDLI: Demand-based document dissemination to reduce traffic and balance load in distributed information systems

Content Provider	IEEE Xplore Digital Library
Author	Bestavros, A.
Copyright Year	1995
Description	Author affiliation: Dept. of Comput. Sci., Boston Univ., MA, USA (Bestavros, A.)
Abstract	Research on replication techniques to reduce traffic and minimize the latency of information retrieval in a distributed system has concentrated on client-based caching, whereby recently/frequently accessed information is cached at a client (or at a proxy thereof) in anticipation of future accesses. We believe that such myopic solutions-focussing exclusively on a particular client or set of clients-are likely to have a limited impact. Instead, we offer a solution that allows the replication of information to be done on a global supply/demand basis. We propose a hierarchical demand-based replication strategy that optimally disseminates information from its producer to servers that are closer to its consumers. The level of dissemination depends on the relative popularity of documents, and on the expected reduction in traffic that results from such dissemination. We used extensive HTTP logs to validate an analytical model of server popularity and file access profiles. Using that model we show that by disseminating the most popular documents on servers closer to clients, network traffic could be reduced considerably, while servers are load-balanced. We argue that this process could be generalized to provide for an automated server-based information dissemination protocol that will be more effective in reducing both network bandwidth and document retrieval times than client-based caching protocols.
Starting Page	338
Ending Page	345
File Size	804975
Page Count	8
File Format	PDF
ISBN	0818671955
ISSN	10636374
DOI	10.1109/SPDP.1995.530703
Language	English
Publisher	Institute of Electrical and Electronics Engineers, Inc. (IEEE)
Publisher Date	1995-10-25
Access Restriction	Subscribed
Rights Holder	Institute of Electrical and Electronics Engineers, Inc. (IEEE)
Subject Keyword	Web server Network servers Information retrieval Telecommunication traffic Traffic control Delay Analytical models File servers Access protocols Bandwidth
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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