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Advancements in Optimization Services: An Integrated Framework for Server and Library Architecture

This paper presents an innovative framework for optimization services, elaborating on key components such as OS libraries, servers, and their synergistic interaction. It discusses the motivation behind this research, the structure of the OS framework, and the functionalities of various OS libraries. Additionally, it highlights the significance of distributed optimization systems and the role of service registries for developers and users. The conclusion focuses on user experience, emphasizing the ease of use, variety of solver options, and the promotion of collaborative, scalable research in optimization.

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Advancements in Optimization Services: An Integrated Framework for Server and Library Architecture

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  1. Optimization Services OS Server and OS Libraries Robert Fourer Jun Ma Northwestern University Kipp Martin University of Chicago Jun Ma maj@northwestern.edu Industrial Engineering and Management Sciences, Northwestern University 11/15/2005

  2. Outline • Motivation • OS Framework • OS Library • OS Server • Conclusion/User Experience

  3. MotivationFuture of Computing

  4. CGI browser Web page socket http/html Web address html form OS Server OS Server Google Web Server Database/ App Service OS FrameworkOptimization Services System location OSP/ OSxL Parse to OSiL

  5. OS Library • OSCommon • representationParser • OSiL Reader/Writer • OSrL result • OSoL option • Etc. • util • data structure • io • xml • etc • communicationInterface • OShL (hook up to solvers/analyzers: solve, send, retrieve) • OScL (call to simulations) • OSdL (discover in registries) • localInterface • OSInstance • etc. • nonlinear: defines all the nonlinear operator/operands/functions OSiLReader reader = new OSiLReader(); reader.read(example.osil); reader.getLinearConstraintCoefficients(); reader.calculateNonlinearFunction(5, x); //x is double[]

  6. OS Library OSSolverAgent agent = new OSSolverAgent(); agent.solverAddress = “http://1.2.3.6/impactSolverService”; String osrlResult = agent.solve(osilInstance, osolOption); • OSAgent • Solver agent • Simulation agent • Solver agent • OSSolver • Utility and implementation of os-compatible solvers • OSSimulation • Utility and implementation of os-compatible simulation. • OSRegistry • Allows os developers to register their services • Lets os users discover os services • Let os users/developers validate instances • OSAnalyzer • Utility and implementation of os-compatible analyzers. • OSScheduler • Schedules optimization jobs over the distributed system • Takes care of all the non-optimization related chores.

  7. GET /xt/services/ColorRequest HTTP/1.0 Content Length: 442 Host: localhost Content-type: text/xml; charset=utf-8 SOAPAction: "/getColor" <soap:Envelope> <soap:Body> <soap:Body> </soap:Envelope> OSP – specifies soap content Communication Interface Representation e.g. hook (“<OSiL> … </OSiL>”) OS FrameworkOptimization Services Protocol (OSP) OSP Application Application SOAP HTTP Presentation Presentation Session Session TCP Transport Transport Network Network IP Link Link Ethernet Physical Physical The 4-layer Internet model The 7-layer OSI Model

  8. OS Server • Networking Protocols: HTTP, SOAP, OSP (OS server: Tomcat, Axis, OS library) OSServer = impactSolverService osp handler soap parser http parser

  9. Conclusion/User Experience • Open Environment • Convenience just like Using Utility Services • No High Computing Power Needed • No Knowledge in Optimization Algorithms and Software (solvers, options, etc.) • Better and More Choices of Modeling Languages • More Solver Choices • Solve More Types of Problems • Automatic Optimization Services Discovery • Decentralized Optimization Services Development and Registration • More Types of Optimization Services Components Integrated (Analyzers/Preprocessors, Problem Providers, Bench Markers) • Smooth Flow and Coordination of Various Optimization Services Components. • A Universal, Scalable and Standard Infrastructure that promotes Collaboration and Other Related Researches • Concentration on Good Modeling

  10. Interested? • MC43 – Standards for Optimization Problem Representation • OSiL (Fourer, Ma, Martin) • OSiL stochastic extension (Gassmann, Fourer, Ma, Martin) • Panel on standards • etc • TC44 – Optimization Tools and Modeling Languages • OSmL (Ma, Martin) • Impact Solver Services (Huanyuan Sheng, Ma, Mehrotra) • etc. • TD43 – Distributed Optimization Systems • Optimization Services Framework (Fourer, Ma, Martin) • etc.

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