Optimization of E-service solutions with the Systems of Servers library

The paper describes a modeling library for analysis and optimization of distributed service systems: enterprise computing infrastructures, E-commerce, and E-service systems. The library uses a small number of basic notions, such as service, server, cluster (of servers), clients and message, which allow describing, analyzing and optimizing various system configurations and distributions of services among servers. The service requests and responses are modeled by messages traveling in the system and using its common resources. Clients send their requests to servers, which either return responses or may issue secondary requests for other services. To find the optimal deployment of services among servers, different partition policies can be deployed including partitions based on genetic algorithms. The library is built on top of Communicating Structures Library (CSL), a modeling environment for large-scale distributed systems (V.E. Kotov, 1998). In its turn, Systems of Servers is a base for specialized libraries that target specific classes of service systems.