NDLI: Improved data layouts for fault tolerant multimedia systems

Content Provider	IEEE Xplore Digital Library
Author	Escobar-Molano, M.L. Lanfeng Hao Barrett, D.A.
Copyright Year	2000
Description	Author affiliation: Univ. of South Florida, St. Petersburg, FL, USA (Escobar-Molano, M.L.)
Abstract	Multimedia servers typically rely on multiple disks for the storage of multimedia data, so they are more vulnerable to disk failures. To guarantee continuous service during disk failure, parity data is stored on-disk and then used to reconstruct missing data. Data pages are clustered into groups and for each group a parity page is computed by applying bitwise exclusive-or over the data pages in the group. The data and parity pages in a group are stored on different disks. If a disk fails then the system can reconstruct a page on the faulty disk by applying bitwise exclusive-or to the other data pages in the group and the parity page. However, retrieving the parity and data pages imposes additional demands on the operational disks. We propose two grouping techniques that aim to minimize the overhead of retrieving the other pages in the parity group. These techniques cluster pages that are likely to be retrieved simultaneously into one parity group. By integrating our grouping techniques with BIBD-based data placement, we produce fault-tolerant layouts for multimedia data. These layouts were evaluated and compared with the declustered parity scheme using a simulation study. Our results show that one of our techniques reduces the average retrieval overhead by a factor of 1.3 to 15.
Starting Page	1429
Ending Page	1432
File Size	451527
Page Count	4
File Format	PDF
ISBN	0780365364
DOI	10.1109/ICME.2000.871035
Language	English
Publisher	Institute of Electrical and Electronics Engineers, Inc. (IEEE)
Publisher Date	2000-07-30
Publisher Place	USA
Access Restriction	Subscribed
Rights Holder	Institute of Electrical and Electronics Engineers, Inc. (IEEE)
Subject Keyword	Fault tolerant systems Multimedia systems Fault tolerance Displays Information retrieval Image reconstruction Image storage Dinosaurs Encoding Medical simulation
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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