Framework for the organization of cooperative services in distributed client-server systems

Abstract A framework for the organization of services in distributed operating systems according to the client-server model is presented. Our approach is based on a clear separation of the concepts of services and servers. It is argued that clients need an interface to services rather than to individual servers. A service is a structure which provides clients with a well-defined functionality with selectable quality. Services are realized by a set of collaborating servers. The proposed framework for the service organization is based on the notion that a service layer is established between the operating system kernel and client-server objects. We demonstrate that this approach supports the development of truly transparent distributed services which hide the server topology from both clients and servers, and which encapsulate non-functional properties of services in cooperation protocols located within the service layer.

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