Osmotic management of distributed complex systems: A declarative decentralised approach

Abstract

Osmotic computing encompasses emerging Cloud‐Internet of Things (IoT) computing paradigms, by featuring the possibility for application services to adapt into different functionally equivalent flavours, depending on the contextually available resources and on specific requirements of running applications. This article proposes a fully decentralised declarative framework that enables both application and infrastructure operators to declare management policies for the service instances and the nodes they manage, respectively. Policies are composed of a simple and well‐defined set of management operations, declared in Prolog, which trigger based on locally available contextual information on application requests and infrastructure resources. A prototype implementation of the framework is showcased and assessed via simulation over a lifelike Smart Campus use case with multiple applications, at increasing infrastructure sizes and number of mobile users. Experimental results show that the proposed management framework scales to large infrastructure sizes and suits the needs of multiflavoured Osmotic applications in dynamic deployment conditions, by improving the trade‐off between their response times and suitable service usage.

Reinforcement optimization for decentralized service placement policy in IoT‐centric fog environment

“…The configurations of the devices in the simulation environment are shown in Table 3, and the experiments followed the same configuration parameters in the POP study. 45 The experiments used a tree-based network topology to manipulate the number of devices in a system. Each fog device interacted with another fog device at the next level via the shortest path to the cloud.…”

“…Different scenarios were considered to evaluate the proposed algorithm by varying the parameters of the number of applications, the number of fog devices, and the number of users/clients. The configurations of the devices in the simulation environment are shown in Table 3, and the experiments followed the same configuration parameters in the POP study 45 . The experiments used a tree‐based network topology to manipulate the number of devices in a system.…”

“…The case considered in these experiments was an online store application, as shown in Figure 7. A similar benchmarking experiment is discussed in Reference 45.…”

“…The decentralized service provisioning introduced by Guerrero 45 produced promising outcomes, such that all latencies in data transmission, decision processing, and return response were reduced, as well as achieving fair load balancing. However, this system still has a challenge due to its high running cost.…”

About the special issue on: “Distributed Complex Systems: Governance, Engineering, and Maintenance”

“…The contribution titled “ Osmotic Management of Distributed Complex Systems: A Declarative Decentralised Approach ” 3 covers emerging research topics about the Cloud‐IoT computing paradigm. The work proposes a fully decentralized framework that enables both application/infrastructure operators to declare management policies for the instances of their services/nodes.…”