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Wail Omar, ISCW’04, China, Date: , Slide 1
An Open Standard Description Language for Semantic Grid Services Assembly for Autonomic Computing
Overlay
Wail M. OmarFaculty of Applied Sciences
Sohar University Sohar, P.C. 311
Sultanate of [email protected]
A. Taleb-BendiabLiverpool John Moores
UniversityByrom Street
Liverpool, L3 3AF, [email protected]
M. YuLiverpool John Moores UniversityByrom StreetLiverpool, L3 AF, [email protected]
Wail Omar, ISCW’04, China, Date: , Slide 2
Scope
• Vision of Global Computing– Requirements– State-of-the-art/Problem
• Assembly Services and Infrastructure Description Language (ASIDL)– ASIDL schema in details– A description through an illustrative example
• Further Works and Evaluation
Wail Omar, ISCW’04, China, Date: , Slide 3
Vision of Global Computing• Global Computing Overlay
– Web services standards and model are further developed to support the vision of global computing,
• which can be characterised as an overlay abstraction upon existing global infrastructures (grid) providing end-users programming, interaction and control models to develop, deploy and manage their required applications for the modern virtual organization business model.
– Thus achieving high-availability whilst reducing cost of ownership of computing assets including data and physical resources.
• To achieve this vision much research work is underway investigating new theories, computational paradigms, languages and implementation techniques for the designing, building, deployment and management of future global computational environments and infrastructures
Wail Omar, ISCW’04, China, Date: , Slide 4
Autonomic Computing
• Autonomic computing is envisaged as model to underpin self-managing global computing. – Pre-requisite for AC is availability and access to a
range of models;• Services and infrastructures, etc.
– Such information include service’s methods, – operations, – required infrastructure, – contract information, – and description language version.
Wail Omar, ISCW’04, China, Date: , Slide 5
State-of-the-art• UDDI standard is widely used and supported by most
middleware technologies such as; – Jini, CORBA, .Net, Globus
• UDDI standard model provides – some business (Name of the author and Contract ID) – basic services information (Access Point, Service Description, and
Interface definitions (WSDL))• WSDL provides specific service model
– By Invoking the WSDL– Disadvantages of Invoking WSDL To Get Information are:
• Waste of time• Costly in the mean of time• Load on the network and communication resources taking in the
consideration million of requesting and transferring files• Some of the WSDL files are too long, and it is difficult to get complete
information from it
Wail Omar, ISCW’04, China, Date: , Slide 6
Assembly Services and Infrastructure Description Language (ASIDL)
• There is a need for yet another description language – that gives significant information at deployment
process which help the consumer and the system in discovering and managing processes.
• Assembly Services and Infrastructure Description Language (ASIDL) was designed to complement WSDL and provide – users – Autonomic Middleware
• Assembled services meta models• infrastructures on deployment process, such information is
needed by software application or other service providers to decided which one of the available services is more suitable and the way to access or invoke it.
Wail Omar, ISCW’04, China, Date: , Slide 7
Assembly Services and Infrastructure Description Language (ASIDL)
Assembly InformationServices AggregationInfrastructure Aggregation
Assembly InformationIDNameCommentVersion
Meta-Services Meta-Infrastructure
Assembly Services
Contract Inform.IDNameLease
Wail Omar, ISCW’04, China, Date: , Slide 8
ASIDL: Services-Meta Model
Meta-Services
Services Inform
User Interface inform
Method Information
Required Infrastructures
Contract Info
Services InformationIDNameDescriptionDescriptionLanguageTypeCategoryTypeContainer LocationAuthorizedDependencyBe Infrastructure
User-Interface IDNameLocation
Method Inform.IDNameInput parameterInput typeOutput parameterOutput type
Required InfrastructureIDNameLocation
Wail Omar, ISCW’04, China, Date: , Slide 9
ASIDL: Infrastructure-Meta Model
Meta-Infrastructure
Infrastructure Information
Infrastructure requirement
Contract Information
Infrastructure Inform.IDNameDescriptionCategoryPlatformMiddleware HostServer
Infrastructure RequirementProcessorMemoryStorage
Wail Omar, ISCW’04, China, Date: , Slide 10
Assembly Services XML Schema
Wail Omar, ISCW’04, China, Date: , Slide 11
Services-Meta Model XML Schema
Wail Omar, ISCW’04, China, Date: , Slide 12
Infrastructure-Meta Model XML Schema
Wail Omar, ISCW’04, China, Date: , Slide 13
Evaluation
• ASIDL has been tested on LAN-based settings, – to design a self-managing middleware for software
services. – Tested in a number of case-studies including
• Intelligent Connected Homes• E-Health Based Grid System
– So far results are promising • For software and infrastructure services discovery
– response time – Accuracy depending on search parameters and the
accuracy of deploying service and infrastructure information.
Wail Omar, ISCW’04, China, Date: , Slide 14
Further Works• Further tests
–WAN-based test with large number of services.
• Integration with other developed models for
–QoP and QoS through sensor and actuator model
•Use by our Machine Learning autonomic middleware service
–Based on Self-Organizing Map• Applications/infrastructure services usage
model characterisation and prediction
