NDLI: Improving Resource Utilization, Scalability, and Availability in Replication Systems Using Object Ownership Distribution

Content Provider	Springer Nature Link
Author	Mostafa, Almetwally M. Youssef, Ahmed E.
Copyright Year	2014
Abstract	In Primary Backup Replication (PBR) systems, the primary node exclusively performs the task of maintaining object consistency for the whole object store; this causes imbalanced load distribution (i.e., poor resource utilization) and limits scalability. In addition, system’s availability and data accessibility are completely lost in case of primary failure. This paper proposes a novel approach that disjoints the exclusive role of the primary node by allowing all nodes (replicas) of the system share the load of maintaining object consistency. We define “object ownership” as the exclusive right of a replica to permit object update. The replica that has this right is called the “owner” of this object. The main idea in the proposed approach is to distribute the ownership of the objects among replicas in the sense that each replica owns the objects that are initially created at it (i.e., created by the clients connected to this replica). Hence, the local object store at each replica can be viewed as if it is logically partitioned into different disjoint sets of objects. Each set is owned by a different replica which controls the update requests of the objects in this set. The proposed Object Ownership Distribution (OOD) approach improves load balancing and resource utilization since all nodes share the load of maintaining object store consistency. Furthermore, it improves scalability since any new replica added to the system will eventually share the load with the existing replicas. In addition, system’s availability is improved since an owner failure only renders its own objects unavailable while objects owned by other owners are not affected.
Starting Page	8731
Ending Page	8741
Page Count	11
File Format	PDF
ISSN	13198025
Journal	Arabian Journal for Science and Engineering
Volume Number	39
Issue Number	12
e-ISSN	21914281
Language	English
Publisher	Springer Berlin Heidelberg
Publisher Date	2014-10-31
Publisher Place	Berlin, Heidelberg
Access Restriction	One Nation One Subscription (ONOS)
Subject Keyword	backup replication Data partitioning Scalability Availability Load balancing Resource utilization Engineering Science
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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