NDLI: Access cost estimation for unified grid storage systems

Content Provider	IEEE Xplore Digital Library
Author	Stockinger, K. Stockinger, H. Dutka, L. Slota, R. Nikolow, D. Kitowski, J.
Copyright Year	2003
Description	Author affiliation: Eur. Organ. for Nucl. Res., CERN, Geneva, Switzerland (Stockinger, K.; Stockinger, H.)
Abstract	In typical data grids large amounts of replicated data are stored all over the globe in different storage systems with access latencies ranging from seconds to hours. The task of a replica management system is not only to keep track of the replicas but also to select those replicas that can be accessed by an application program with a minimal response or transfer time. Most wide-area replication research focuses on network-based replica selection. However, our past experience with data grids has shown that often hierarchical storage systems are the main bottleneck rather than network links. This is due to the fact that access latencies of hierarchical storage systems can be of the order of seconds up to hours in case the data resides on a tape that is not mounted yet. We give an overview of our replica management framework called Reptor and a storage system cost estimator that is used. Furthermore, we give details on access estimation of file replicas that reside on hierarchical storage systems. The results show that the access estimates provide a good basis for a replica management system to perform efficient replica selection.
Sponsorship	IEEE Comput. Soc. IEEE Task Force on Cluster Comput
Starting Page	149
Ending Page	156
File Size	323119
Page Count	8
File Format	PDF
ISBN	076952026X
DOI	10.1109/GRID.2003.1261710
Language	English
Publisher	Institute of Electrical and Electronics Engineers, Inc. (IEEE)
Publisher Date	2003-11-17
Publisher Place	USA
Access Restriction	Subscribed
Rights Holder	Institute of Electrical and Electronics Engineers, Inc. (IEEE)
Subject Keyword	Costs Delay Project management Computer science Time factors Performance evaluation Physics Earth Data analysis Performance analysis
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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