Dynamic Reconfiguration of Object-Middleware-based Distributed Systems
نویسندگان
چکیده
Distributed systems with high availability requirements have to support some form of dynamic reconfiguration. This means that they must provide the ability to be maintained or upgraded without being taken off-line. This thesis addresses the dynamic reconfiguration of distributed applications that run on top of an object-middleware infrastructure. In this context, a system configuration is defined as a structure of software entities at application-level. Dynamic reconfiguration entails operations for the replacement, migration, creation and removal of these entities at run-time. This thesis proposes an approach to dynamic reconfiguration for applications built using object-middleware and realizes this approach with an architecture and design of middleware support for reconfiguring CORBA-based distributed systems at run-time.
منابع مشابه
Access control in ultra-large-scale systems using a data-centric middleware
The primary characteristic of an Ultra-Large-Scale (ULS) system is ultra-large size on any related dimension. A ULS system is generally considered as a system-of-systems with heterogeneous nodes and autonomous domains. As the size of a system-of-systems grows, and interoperability demand between sub-systems is increased, achieving more scalable and dynamic access control system becomes an im...
متن کاملAn approach to dynamic reconfiguration of distributed systems based on object-middleware
There is an increasing demand for long running and highly available systems. This holds particularly for distributed systems based on object-middleware, which are becoming increasingly popular nowadays. Dynamic reconfiguration consists of modifying the configuration of a system during runtime, contributing to the availability of the system. This paper introduces a novel approach to dynamic reco...
متن کاملDynamic Reconfiguration for Middleware-Based Applications
Distributed systems with high availability requirements have to allow reconfiguration of the system without being taken off-line. Examples of reconfigurations are the replacement of a component with a newer version, or the migration of a component to another node. A key issue for reconfiguration is maintaining the correctness of the system, which can be very complex due to the number of compone...
متن کاملTransparent Dynamic Reconfiguration for CORBA
Distributed systems with high availability requirements have to support some form of dynamic reconfiguration. This means that they must provide the ability to be maintained or upgraded without being taken off-line. Building a distributed system that allows dynamic reconfiguration is very intrusive to the overall design of the system, and generally requires special skills from both the client an...
متن کاملA Consistency Framework for Dynamic Reconfiguration in AO-Middleware Architectures
Aspect-oriented (AO) middleware is a promising technology for the realisation of dynamic reconfiguration in distributed systems. Similar to other dynamic reconfiguration approaches, AO-middleware based reconfiguration requires that the consistency of the system is maintained across reconfigurations. AO middleware based reconfiguration is an ongoing research topic and several consistency approac...
متن کامل