NDLI: Distributed storage with communication costs

Content Provider	IEEE Xplore Digital Library
Author	Armstrong, C. Vardy, A.
Copyright Year	2011
Description	Author affiliation: University of California, San Diego La Jolla, California 92093-0401, USA (Armstrong, C.; Vardy, A.)
Abstract	Distributed storage systems provide reliable storage of data by dispersing redundancy across multiple nodes. As the individual nodes are unreliable this protects the integrity of the data against failures. In order to maintain this reliability, new nodes must be introduced into the system whenever nodes are lost which restore the redundancy. This process involves having a new node download information from remaining nodes and is known as the repair problem. In this paper, we consider networks with communication costs associated to each link and explore means to minimize the cost of performing these repairs. We do this by considering a generalized method of repair wherein the amount of information downloaded to a new node varies amongst the other nodes in the network. We find that when nodes store the minimum amount of data that the minimum cost can be achieved by quasi-uniform repair, where the same amount of data is downloaded from each node with which communication takes place. We also consider systems with the additional freedom that the amount of storage is allowed to vary from node to node and look at repair cost minimization there as well.
Starting Page	1358
Ending Page	1365
File Size	526274
Page Count	8
File Format	PDF
ISBN	9781457718175
e-ISBN	9781457718182
DOI	10.1109/Allerton.2011.6120325
Language	English
Publisher	Institute of Electrical and Electronics Engineers, Inc. (IEEE)
Publisher Date	2011-09-28
Publisher Place	USA
Access Restriction	Subscribed
Rights Holder	Institute of Electrical and Electronics Engineers, Inc. (IEEE)
Subject Keyword	Peer to peer computing Redundancy Bandwidth Maintenance engineering Minimization Cost function
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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