Abstract: A method for simulating a computer system includes defining a set of building blocks including models of components of the computer system. The set of building blocks is interconnected to produce a topological model of the computer system. A client transaction model is derived based on historical data, for generating simulated client requests to be processed by the topological model. A resource requirement model is produced based on the topological model and on the historical data, the resource requirement model simulating a resource utilization of the components of the computer system responsively to the generated client requests. A performance metric of the computer system is estimated by simulating the computer system using the simulated client requests and the resource requirement model.

Abstract: A method for simulating a computer system includes defining a set of building blocks including models of components of the computer system. The set of building blocks is interconnected to produce a topological model of the computer system. A client transaction model is derived based on historical data, for generating simulated client requests to be processed by the topological model. A resource requirement model is produced based on the topological model and on the historical data, the resource requirement model simulating a resource utilization of the components of the computer system responsively to the generated client requests. A performance metric of the computer system is estimated by simulating the computer system using the simulated client requests and the resource requirement model.

Abstract: A computer implemented method and system for optimizing performance of a business IT infrastructure, wherein business objectives are obtained as input and the IT business infrastructure and/or business level components associated therewith are optimized according to the business objectives. In one embodiment, an objectives definition is created that defines business objectives and business rules determining how IT level metrics affect the business objectives and, optionally, service level agreements or other contract definitions based on the objectives definition. A runtime performance of the business objectives is determined during runtime of the business IT infrastructure by monitoring the business IT infrastructure, its compliance with the contract definitions, and the business objectives achieved by the business IT infrastructure.

Abstract: A method for simulating a computer system includes defining a set of building blocks including models of components of the computer system. The set of building blocks is interconnected to produce a topological model of the computer system. A client transaction model is derived based on historical data, for generating simulated client requests to be processed by the topological model. A resource requirement model is produced based on the topological model and on the historical data, the resource requirement model simulating a resource utilization of the components of the computer system responsively to the generated client requests. A performance metric of the computer system is estimated by simulating the computer system using the simulated client requests and the resource requirement model.

Abstract: A computer implemented method and system for optimizing performance of a business IT infrastructure, wherein business objectives are obtained as input and the IT business infrastructure and/or business level components associated therewith are optimized according to the business objectives. In one embodiment, an objectives definition is created that defines business objectives and business rules determining how IT level metrics affect the business objectives and, optionally, service level agreements or other contract definitions based on the objectives definition. A runtime performance of the business objectives is determined during runtime of the business IT infrastructure by monitoring the business IT infrastructure, its compliance with the contract definitions, and the business objectives achieved by the business IT infrastructure.