The traditional cycle of industrial products has been linear since its inception. Raw resources are acquired, processed, distributed, used and ultimately disposed of. This linearity has led to a dangerously low efficiency degree in resource use, and has brought forth serious concerns for the viability of our natural ecosystem. Circular economy is introducing a circular workflow for the lifetime of products. It generalizes the disposal phase, reconnecting it to manufacturing, distribution and end-use, thus limiting true deposition to the environment. This process has not been extended so far to software. Nonetheless, the development of software follows the same phases, and also entails the use-and waste-of considerable resources. This include human effort, as well as human and infrastructure sustenance products such as food, traveling and energy. This paper introduces circular economy principles to the software development, and particularly to network management logic and security. It employs a recently proposed concept-the Socket Store-which is an online store distributing end-user network logic in modular form. The Store modules act as mediators between the end-user network logic and the network resources. It is shown that the Socket Store can implement all circular economy principles to the software life-cycle, with considerable gains in resource waste.
In 1998, proposed the REMOS unified network query interface, which allowed applications to request network topology and congestion information, in order to tune their behavior accordingly @cite_17 . PerfSONAR is a more recent approach towards this direction @cite_9 , employing a more standardized metadata format for describing network characteristics @cite_28 . The Unified Network Information Service @cite_33 , offered an alternative solution with scalability, security and performance benefits. Application domain-specific network querying solutions exist as well, such as MonALISA for distributed systems @cite_5 , and the Network Weather Service for meta-computing @cite_32 . These approaches also employ standardized formats for representing the network status and configuration @cite_12 . In Socket Store terminology, these works are means of exposing the network infrastructure capabilities, allowing researchers to build Socket modules on top of them.
@cite_33 @cite_28 @cite_9 @cite_32 @cite_5 @cite_12 @cite_17
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Development of portable network-aware applications demands an interface to the network that allows an application to obtain information about its execution environment. The paper motivates and describes the design of Remos, an API that allows network-aware applications to obtain relevant information. The major challenges in defining a uniform interface are network heterogeneity, diversity in traffic requirements, variability of the information, and resource sharing in the network. Remos addresses these issues with two abstraction levels, explicit management of resource sharing, and statistical measurements. The flows abstraction captures the communication between nodes, and the topologies abstraction provides a logical view of network connectivity. Remos measurements are made at network level, and therefore information to manage sharing of resources is available. Remos is designed to deliver best effort information to applications, and it explicitly adds statistical reliability and variability measures to the core information. The paper also presents preliminary results and experience with a prototype Remos implementation for a high speed IP based network testbed. A holistic view of the network is key to the successful operation of many distributed, cloud-based, and service-oriented computing architectures. Supporting network-aware applications and application-driven networks requires a detailed representation of network resources, including multi-layer topologies, associated measurement data, and in-the-network service location and availability information. The rapid development of increasingly configurable and dynamic networks has increased the demand for information services that can accurately and efficiently store and expose the state of the network. This work introduces our Unified Network Information Service (UNIS), designed to represent physical and virtual networks and services. We describe the UNIS network data model and its RESTful interface, which provide a common interface to topology, service, and measurement resources. In addition, we describe the security mechanisms built into the UNIS framework. Our analysis of the UNIS implementation shows significant performance and scalability gains over an existing and widely-deployed topology, service registration, and lookup information service architecture. Reliable storage of data with concurrent read write accesses (or query update) is an ever recurring issue in distributed settings. In mobile ad hoc networks, the problem becomes even more challenging due to highly dynamic and unpredictable topology changes. It is precisely this unpredictability that makes probabilistic protocols very appealing for such environments. Inspired by the principles of probabilistic quorum systems, we present a Probabilistic quorum system for ad hoc networks Pan), a collection of protocols for the reliable storage of data in mobile ad hoc networks. Our system behaves in a predictable way due to the gossip-based diffusion mechanism applied for quorum accesses, and the protocol overhead is reduced by adopting an asymmetric quorum construction. We present an analysis of our Pan system, in terms of both reliability and overhead, which can be used to fine tune protocol parameters to obtain the desired tradeoff between efficiency and fault tolerance. We confirm the predictability and tunability of Pan through simulations with ns-2. This paper presents an innovative approach for the publication and discovery of Web services. The proposal is based on two previous works: DIRE (DIstributed REgistry), for the user-centered distributed replication of service-related information, and URBE (UDDI Registry By Example), for the semantic-aware match making between requests and available services. The integrated view also exploits USQL (Unified Service Query Language) to provide users with a higher level and homogeneous means to interact with the different registries. The proposal improves background technology in different ways: we integrate USQL as high-level language to state service requests, widen user notifications based on URBE semantic matching, and apply URBE match making to all the facets with which services can be described in DIRE. All these new concepts are demonstrated on a simple scenario.