Service Level Agreements for Cloud Computing PDF
Preview Service Level Agreements for Cloud Computing
Service Level Agreements for Cloud Computing Philipp Wieder • Joe M. Butler Wolfgang Theilmann • Ramin Yahyapour Editors Service Level Agreements for Cloud Computing Foreword by Jessica McCarthy Editors Philipp Wieder Joe M. Butler IT & Media Center Intel Ireland Limited Service Computing Group Leixlip, Kildare TU Dortmund University Ireland Dortmund Germany [email protected] Wolfgang Theilmann Ramin Yahyapour SAP Research IT & Media Center Karlsruhe Service Computing Group Germany TU Dortmund University Dortmund Germany ISBN 978-1-4614-1613-5 e-ISBN 978-1-4614-1614-2 DOI 10.1007/978-1-4614-1614-2 Springer New York Dordrecht Heidelberg London Library of Congress Control Number: 2011939783 © Springer Science+Business Media, LLC 2011 All rights reserved. This work may not be translated or copied in whole or in part without the written permission of the publisher (Springer Science+Business Media, LLC, 233 Spring Street, New York, NY 10013, USA), except for brief excerpts in connection with reviews or scholarly analysis. Use in connection with any form of information storage and retrieval, electronic adaptation, computer software, or by similar or dissimilar methodology now known or hereafter developed is forbidden. The use in this publication of trade names, trademarks, service marks, and similar terms, even if they are not identified as such, is not to be taken as an expression of opinion as to whether or not they are subject to proprietary rights. Printed on acid-free paper Springer is part of Springer Science+Business Media (www.springer.com) TheSLA@SOIprojectisdedicatedtoprovide abusiness-readyservice-oriented infrastructureempoweringtheservice economyinaflexibleanddependableway. Foreword SLA@SOI is one of the most significant projects funded under the European Union’s Seventh Framework Programme. With a budget of over 15 million Eu- rosandaconsortiumoftwelvepartners,SLA@SOIisacomprehensiveintegrated project of broad scope, touching market segments in areas including management of service level agreements (SLAs), service-oriented infrastructures (SOIs), cloud computing,enterpriseservicebusesandXaaSprovisioning(includingPlatformasa Service,SoftwareasaService,InfrastructureasaService,etc).Relevantinitiatives includeglobal-scalecommercialofferings,well-supportedopensourceprojects,and large,strategicpublicly-fundedresearchinitiatives. SLA@SOIoperateswithinhighlydynamicandfast-movingdomains,andmany world-classplayersareveryactiveinareasinwhichSLA@SOIcanmakemostim- pact,namelycloudcomputingandservice-orientedarchitectures.WeinSLA@SOI believethatSLAsareakeytechnologyfortransformingserviceandcloudofferings intotradeablegoods.Theprojecthasinvestedthreeyearsofin-depthresearchand analysisintotheSLAdomain,developingacomprehensivearchitectureandrefer- enceimplementationforSLAmanagement,thenevaluatingandincorporatingthese resultsinfourdistinctandcomplementaryindustrialusecases. Specifically,theSLA@SOIprojectaimstoenableautomaticnegotiationofper- sonalisedSLAsacrossmultipleproviders,suchthatindividualSLAsforthousands ofcustomerscanbeautomaticallymanagedandoptimised.Mostindustrialservice providershavenotyetcometotermswiththisnotionofprovidingautomatedSLAs withtheirserviceofferings,whichisverypromisingfromSLA@SOI’sperspective. Currently, market leaders still rely on highly manual processes for making claims onSLAviolations. Machine-readableSLAs,ontheotherhand,willallowconsumersandproviders of online services to precisely specify the services and service levels they require, confirmthatSLAsarebeingmet,andautomaticallydealwithanySLAviolations. SLA@SOIprovidesaframeworkunderwhichautomaticSLAnegotiationandSLA- awareoptimisationbecomefeasible.Machine-readableSLAsallowservicelevelsto bepersonalised,automaticallynegotiated,aggregated,andcontinuouslyassured. vii viii Foreword ThebookpresentsauniqueinsightintotheSLA@SOIproject,withafocuson reference architectures, open reference case examples, SLA models, service con- struction meta-models, and approaches to infrastructure monitoring and runtime prediction. The book also recounts the results of four SLA@SOI use cases—in e- government,Telcoserviceaggregation,ERPhosting,andenterpriseIT—analysing outcomesfromabusinessandtechnicalresearchperspective. As exploitation manager for SLA@SOI, I have observed firsthand the interest this research project has generated from both industry and academia. The project is differentiated from other commercial and research offerings in that it has an SLA-drivenapproachthatconsidersarangeofstakeholders(e.g.serviceproviders, softwareproviders,infrastructureprovidersandservicecustomers)whileexplicitly tackling challenges at the business, software and infrastructure levels. SLA@SOI aims to provide an automated and holistic awareness of personalised SLAs along- sideabusiness-readySOIthatempowerstheserviceeconomyandFutureInternet inaflexibleanddependableway. By defining a cohesive research agenda for Europe going forward, the Future Internet initiative will provide important medium- and long-term opportunities for exploitationofSLA@SOI. Dublin,June2011 JessicaMcCarthy Preface IT-supportedserviceprovisioningisofmajorrelevanceforalmostallindustriesand IT domains. And with the evolution of ecosystems where everything can become a service and the actual IT provisioning is virtualized, the importance of service- related infrastructures will further increase. The so-called clouds already have the buyinfromindustry,resultingintermslikeeverything-as-a-service,scaleout,multi tenancy, and pay-as-you-go become increasingly popular to describe this new ap- proach,showingontheonehandthebusinessmodelbehindthecloudofferingsand on the other hand underlining its commercial character. From a research perspec- tive,thissomehowyoungdisciplineoffersalargevarietyoftopicsandnoveltopics willcertainlyemerge. The research project SLA@SOI (funded under the Seventh Framework Pro- grammewithgrantnumberFP7-216556)providesamajormilestoneforthefurther evolutiontowardsaservice-orientedeconomy,whereIT-basedservicescanbeflex- ibly traded as economic good, i.e. under well-defined and dependable conditions andwithclearlyassociatedcosts.Eventually,thiswillallowfordynamicvaluenet- worksthatcanbeflexiblyinstantiatedthusdrivinginnovationandcompetitiveness. SLA@SOIcreatedaholisticviewforthemanagementofservicelevelagreements (SLAs)andprovidesanSLAmanagementframeworkthatcanbeeasilyintegrated intoaservice-orientedinfrastructure. Europe has set high goals in becoming the most active and productive service economy in the world. Especially IT supported services evolved into a common utility which is offered and consumed by many stakeholders. Cloud computing gainedsignificantattentionandcommercialuptakeinmanybusinessscenarios.This rapidly growing service oriented economy has highlighted key challenges and op- portunitiesinIT-supportedserviceprovisioning.Withmorecompaniesincorporat- ing cloud-based IT services as part of their own value chain, reliability and de- pendabilitybecomeacrucialfactorinmanagingbusiness.Servicelevelagreements arethecommonmeanstoprovidethenecessarytransparencybetweenservicecon- sumersandproviders. SLA@SOIasamajorEuropeanprojectaddressestheissuessurroundingtheim- plementationofautomatedSLAmanagementsolutionsforserviceorientedinfras- ix
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