title = {Decentralized performance-aware reconfiguration of complex service configurations}, author = {van Splunter, S. and van Langen, P. H. G. and Brazier, F. M. T. }, booktitle = {Proceedings of the Performance for Peer-to-Peer Systems (P4P2P) workshop}, year = {2008}, month = {May}, organization = {University of Warwick}, location = {Warwick}, abstract = {Execution of complex workflows is one of many applications of P2P networks. Sustaining complex workflows in a dynamic P2P network requires adaptation when hosts involved in the workflow lose network connectivity. Adaptation of complex workflows without centralised monitoring and control is a challenge, and is often limited to instance replacement. If requirements are given on the performance of the complex workflow as a whole, then possibilities for automated adaptation are limited even more. This paper describes how adaptation of complex web service configurations can be applied on complex workflows in P2P networks. In our approach templates are used as a structuring principle, allowing distribution of the requirements on which the complex service configuration is based. This distribution of requirements allows local adaptation, without centralised monitoring and control. Checking locally whether overall performance requirements are satisfied for a proposed adaptation is enabled by propagation functions. By deploying a template-based web service configuration over the P2P network, effectively a distributed adaptive overlay network is created.}, } |