NDLI: Dynamic re-negotiations of SLA in service composition scenarios

Content Provider	IEEE Xplore Digital Library
Author	Di Modica, G. Regalbuto, V. Tomarchio, O. Vita, L.
Copyright Year	2007
Description	Author affiliation: Univ. di Catania, Catania (Di Modica, G.; Regalbuto, V.; Tomarchio, O.; Vita, L.)
Abstract	In a SOA environment services are implemented on top of resources across different administrative domains, in which IT infrastructure and internal resources are managed according to autonomous policies. Service Providers and their customers negotiate utility based Service Level Agreements (SLAs) to determine costs and penalties based on the achieved performance levels. In B2B scenarios where several service providers are involved in the composition of a service, and each of them plays both the parts of provider and customer, several one-to-one SLAs need to be signed. In such a rigid context the global QoS of the final service can be strongly affected by any violation on each single SLA. In order to prevent such violations, SLAs need to flexible during service provision. The WS-Agreement specification, developed by the Global Grid Forum, is a Web Service protocol to establish agreements on the QoS level to be guaranteed in the provision of a service. The committed WS-Agreement can not be modified during service provision and is effective until all activities pertaining to it are finished or until one of the signing parties decides to terminate it. In this work we focus on this specification and propose to enhance the flexibility of its approach. We integrate new functionality to the protocol that enable the parties of a WS-Agreement to re-negotiate and modify its terms during the service provision, and show how a typical scenario of service composition can benefit from our proposal.
Starting Page	359
Ending Page	366
File Size	284451
Page Count	8
File Format	PDF
ISBN	9780769529776
ISSN	10896503
DOI	10.1109/EUROMICRO.2007.27
Language	English
Publisher	Institute of Electrical and Electronics Engineers, Inc. (IEEE)
Publisher Date	2007-08-28
Publisher Place	Germany
Access Restriction	Subscribed
Rights Holder	Institute of Electrical and Electronics Engineers, Inc. (IEEE)
Subject Keyword	Context-aware services Protocols Runtime Costs Web services Service oriented architecture Telecommunications Resource management Environmental management Contracts
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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