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The Storage Capacity Design Dilemma an ITIL Approach KT v01.14 EDUCATION The Storage Capacity Design Dilemma an ITIL approach LeRoy Budnik Knowledge Transfer KT v01.14 SNIA Legal Notice EDUCATION • The material contained in this tutorial is copyrighted by the SNIA and portions are subject to other copyrights1. • Member companies and individuals may use this material in presentations and literature under the following conditions: – Any slide or slides used must be reproduced without modification – The SNIA must be acknowledged as source of any material used in the body of any document containing material from these presentations. – This specific legal notice shall not be removed. • This presentation is a project of the SNIA Education Committee. The Storage Capacity Design Dilemma © 2007 Storage Networking Industry Association. All Rights Reserved. 1 © 1997-2007 Knowledge Transfer 2 KT v01.14 Abstract EDUCATION The Storage Capacity Design Dilemma As architects, we must continually discover capability limits, constraints, and patterns and match requirements, capabilities and cost to provide an effective design. When we add the business requirements, it becomes the core mantra of ILM. Yet translating these requirements into hardware and software is not easy. In the process, we must continuously choose between complex alternatives, some of which seem equally unacceptable, and hence the dilemma. In this session, we will introduce fundamentals of storage infrastructure design from the perspective of ILM requirements. We will introduce key formulas, the science of storage capacity planning and follow a case study to demonstrate application in host, fabric and array design, to meet the requirements. The dilemmas of design decisions clear up once you know the formulas. It will change your thinking. The Storage Capacity Design Dilemma © 2007 Storage Networking Industry Association. All Rights Reserved. 3 KT v01.14 Objectives EDUCATION In this session, we have a dual focus on the science and consultative process of developing a mature discipline of storage capacity assessment, planning and design. The IT Information Library (ITIL) is the foundation of the methodology. Essential formulas come from a variety of sources. Objectives: • Know basic storage capacity and performance formulas • Design for capacity and scalability in hosts, SAN, storage arrays and backup • Understand how to break out of the most common storage design dilemmas The Storage Capacity Design Dilemma © 2007 Storage Networking Industry Association. All Rights Reserved. 4 KT v01.14 TLS Inc. EDUCATION The Storage Capacity Design Dilemma © 2007 Storage Networking Industry Association. All Rights Reserved. 1 © 2000-2007 Knowledge Transfer 5 KT v01.14 Capacity Management EDUCATION GoalScopeNoWhy? text ToBusinessCapacity understand ManagementStrategy the andfuture Plan,ensures business IT Strategythat IT requirements,andprocess Plan and including storage the organization’s all capacity applications, provisioning operations andhardware,match IT evolvinginfrastructure O/S, businessnetworking, to ensure demand peripherals that in all a cost and currenthumaneffective resourcesand and future timely capacity manner and performance aspects of the business requirements are provided cost effectively. The Storage Capacity Design Dilemma © 2007 Storage Networking Industry Association. All Rights Reserved. 1 © Crown Copyright with value added status 6 KT v01.14 Process EDUCATION OutputsServiceResourceNoBusinessInputs text Capacity CapacityCapacity Management ManagementManagement • Technology • Deployment and • CapacityMonitor,Trend, forecast, Plan analyze, mode, tunerun and andprototype,• reportProactivedevelopment report on onsize changes the plansand and and • CapacitystorageutilizationSLAs,document SLRs Databaseservice of ofand storagefuture Service performance (CDB) business components serviceprograms requirements improvements and Catalog • BaselinesEstablishtheir impact and baselines onprofiles storage and services •profiles• RevisedExpected, of operational use scheduled of the • Business plans and schedulechanges • Capacitystorage reportsservicescomponents (regular, strategy • Incidents and problems ad hoc and exception) • Effectiveness reviews • ManageIT plans and demand strategy for storage• Service services Reviews • SLA and SLR • Audit reports • SLA breaches • recommendationsBusiness requirements and transaction volumes • Financial plans • Costing and charging • Budgets • recommendationsOperational schedules The Storage Capacity Design Dilemma © 2007 Storage Networking Industry Association. All Rights Reserved. 1 © Crown Copyright with value added status 7 KT v01.14 Iterative Capacity Management Activities EDUCATION The Storage Capacity Design Dilemma © 2007 Storage Networking Industry Association. All Rights Reserved. 1 © Crown Copyright with value added status 8 KT v01.14 CDB EDUCATION The Storage Capacity Design Dilemma © 2007 Storage Networking Industry Association. All Rights Reserved. 1 © Crown Copyright with value added status 9 KT v01.14 Workload Management EDUCATION NoTechnicalCategorize text Metrics ProcessClassify Metrics • UtilizationBusiness • MTTPOpen • I/OsFunctional • MTTIClosed • BlockOperational Size • MTTM • Transfer Rates • MTBF/MTTR • Cost The Storage Capacity Design Dilemma © 2007 Storage Networking Industry Association. All Rights Reserved. 1 © Crown Copyright with value added status 10 KT v01.14 Producing a Capacity Plan EDUCATION NoCapacity text Plan Structure • Introduction • Scope • Methods • Assumptions • Management Summary • Business Scenarios • Storage Service Summary • Storage Resource summary • Options for Storage Service Improvement • Storage Cost Model • Recommendations The Storage Capacity Design Dilemma © 2007 Storage Networking Industry Association. All Rights Reserved. 1 © Crown Copyright with value added status 11 KT v01.14 Costs, benefits, problems EDUCATION CostsBenefitsPossibleNo text Problems • Hardware,IncreasedCustomer expectations efficiencysoftware andand exceed toolscost savings technical capacity • ProjectOver– Deferred expectation management expenditure of tuning benefits – Economic provisioning • StaffUnrealistic and unachievable performance targets – Planned purchasing • Over optimistic vendor estimates • ReducedAccommodation risk • Lack of Information • Confident forecasts No text • Reliance on Linear Prediction • Proven value to application lifecycle The Storage Capacity Design Dilemma © 2007 Storage Networking Industry Association. All Rights Reserved. 12 KT v01.14 Planning and Implementation EDUCATION • Capacity Management – DefineReview monitoring what exists points as a planned event! – Locate the Capacity data • Plan the process – Integrate into other planning processes – TrainSeek thebusiness staff • Synchronize with the – confidenceEstablish timeline levels and – Establish monitoring and budget cycle place components – integratedIdentify infrastructure data collection for delivering the volatility (probability) • Implement the process – CapacityExpand to Plan include: – Business Capacity – Service Capacity – Resource Capacity The Storage Capacity Design Dilemma © 2007 Storage Networking Industry Association. All Rights Reserved. 13 KT v01.14 Process Review EDUCATION ReviewValidateCriticalKeyNo text Performance SuccessGoals Metrics Factors Indicators • IsAccurateCalculationsResource required business forecastsoutput and formulas available forecasts at the required times for • KnowledgeComponenttheTechnology appropriate ofutilization IT audience strategy and plans, and that the • Acceptable data collection • IsplansCost-effectiveness it’s activitiesare accurate cost effective? • UnderstandingAccuracy of tuning of current predictions and future technologies • Measurement of accuracy of match between • withinAre potential the capacity and actual management breaches team predicted and IT Storage Capacity and Business Need. • Abilityassociated to demonstrate with full notification? cost effectiveness • Are imposed constraints within acceptable client limits? • Interaction with other Service Management processes • Is reporting regular and on time? • Storage capacity matches business need • Is the capacity plan produced on time? • Are recommendations clear and accurate? The Storage Capacity Design Dilemma © 2007 Storage Networking Industry Association. All Rights Reserved. 14 KT v01.14 Capacity Process Interfaces EDUCATION The Storage Capacity Design Dilemma © 2007 Storage Networking Industry Association. All Rights Reserved. 15 KT v01.14 Roles and Responsibilities EDUCATION ResponsibilitiesCapacityStorage Team:Manager:Capacity include focus (1)(2) areas:: •• ProduceTestOftenMatchesProduce performance split storagestorageand into maintain performance capacitycapacity of new storage storage plansand monitoring demand capacity systems byand plan •• ProduceRecommendcapacityincreasingMonitor storageplanningstorage or managing servicemanagement availablelevels reports •• SizestorageRecommend– Tuning new capacity storageand storagedesign systems improvementstuning •• AssessEnsuringManage– Resolution new storagethat technology toexisting performance demand storage problems capacity is used optimally •• ImplementRecommend– Use of demand service storage managementlevel capacity reporting of capacity • PredictStudiesenhancements demandas required for storage services •• DetermineAccount for that workload storage changes service levels are maintainedin storage serviceand cost level justified targets The Storage Capacity Design Dilemma © 2007 Storage Networking Industry Association.
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