C-Chord: Hierarchical peer-to-peer protocol over a fully decentralized IaaS Cloud

Abstract

Web Services publication and discovery are commonly implemented over a centralized client-server approach. Therefore, at high requests' rate server nodes are bottlenecked and the system scale is unable to follow the increasing load. To address this issue, we consider the Cloud computing concept where huge amount of resources such as, storage, processing and bandwidth capacities are available on demand. In this paper, we propose a decentralized cloud system, which aims to improve the system performances, such as requests latency and reliability, in compare with the classical centralized cloud architecture. Our solution, called C-Chord, is based on peer-to-peer hierarchical Chord network operating over a fully decentralized Infrastructure as a Service (IaaS) cloud system. In order to enhance the reliability of Web services, C-Chord relies on virtual peers that support diversification of Web Services class. It also introduces a multi-keys Web service query instead of one single key.