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A design tool includes a service definition model to enable abstract description of distributed computing systems and distributed applications. The design tool also includes a schema to dictate how functional operations within the service definition model are to be specified. The functional operatio

A design tool includes a service definition model to enable abstract description of distributed computing systems and distributed applications. The design tool also includes a schema to dictate how functional operations within the service definition model are to be specified. The functional operations include design of distributed applications, deployment of distributed applications, and management of distributed applications.

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The invention claimed is: 1. A design tool comprising: a service definition model to enable abstract description of distributed computing systems and distributed applications; and a schema to dictate how functional operations within the service definition model are to be specified, wherein the func

The invention claimed is: 1. A design tool comprising: a service definition model to enable abstract description of distributed computing systems and distributed applications; and a schema to dictate how functional operations within the service definition model are to be specified, wherein the functional operations include design of distributed applications, deployment of distributed applications, and management of distributed applications. 2. A method comprising: hosting an implementation of a distributed system architected using a service definition model (SDM); exposing a set APIs for manipulating an SDM type; and tracking SDM instances for deployment and management of distributed applications. 3. The method of claim 2 further comprising tracking SDM instances for design time validation. 4. The method of claim 2 further comprising designing distributed applications on the distributed system. 5. The method of claim 2 further comprising designing distributed applications on the distributed system using the service definition model. 6. A method of facilitating design of a scale-invariant virtual data center representative of a physical data center, the method comprising: describing the physical data center according to a service definition model, wherein the service definition model includes: services associated with designing distributed applications; services associated with deploying distributed applications; and services associated with managing distributed applications. 7. The method of claim 6 wherein the virtual data center is supported by a first data center and a second data center such that an application can be deployed into either the first data center or the second data center without requiring changes in the logical model mapping between the application parts and the virtual data center parts. 8. The method of claim 6 further comprising: determining a number of instances to be created for a particular logical component of the physical data center; and determining a wiring topology to implement the physical data center. 9. The method of claim 6 further comprising automatically deploying physical resources and a distributed application. 10. The method of claim 6 further comprising managing a distributed application on the physical data center using a model-based management approach. 11. The method of claim 6 wherein the physical data center includes an operations engine for orchestrating a sequence of operations tasks in response to a triggering event. 12. The method of claim 11 wherein the triggering event is annotated with application context from the service definition model. 13. The method of claim 11 wherein the sequence of operations tasks includes deploying a new resource using a resource management system. 14. A resource manager comprising: means for allocating resources within a distributed computing system; means for discovering available hardware; means for processing resource allocation requests; means for tracking ownership of resources; means for controlling resources; and means for providing a common API for all resource management within the distributed computing system. 15. The resource manager of claim 14 wherein the means for allocating resources is configured to allocate logical resources and physical resources within the distributed computing system. 16. The resource manager of claim 14 further comprising means for managing a distributed application on the distributed computing system. 17. The resource manager of claim 14 wherein the means for controlling resources is configured to orchestrate a sequence of operations tasks in response to an event.