1,057 research outputs found
Addressing the Challenges in Federating Edge Resources
This book chapter considers how Edge deployments can be brought to bear in a
global context by federating them across multiple geographic regions to create
a global Edge-based fabric that decentralizes data center computation. This is
currently impractical, not only because of technical challenges, but is also
shrouded by social, legal and geopolitical issues. In this chapter, we discuss
two key challenges - networking and management in federating Edge deployments.
Additionally, we consider resource and modeling challenges that will need to be
addressed for a federated Edge.Comment: Book Chapter accepted to the Fog and Edge Computing: Principles and
Paradigms; Editors Buyya, Sriram
A Taxonomy of Data Grids for Distributed Data Sharing, Management and Processing
Data Grids have been adopted as the platform for scientific communities that
need to share, access, transport, process and manage large data collections
distributed worldwide. They combine high-end computing technologies with
high-performance networking and wide-area storage management techniques. In
this paper, we discuss the key concepts behind Data Grids and compare them with
other data sharing and distribution paradigms such as content delivery
networks, peer-to-peer networks and distributed databases. We then provide
comprehensive taxonomies that cover various aspects of architecture, data
transportation, data replication and resource allocation and scheduling.
Finally, we map the proposed taxonomy to various Data Grid systems not only to
validate the taxonomy but also to identify areas for future exploration.
Through this taxonomy, we aim to categorise existing systems to better
understand their goals and their methodology. This would help evaluate their
applicability for solving similar problems. This taxonomy also provides a "gap
analysis" of this area through which researchers can potentially identify new
issues for investigation. Finally, we hope that the proposed taxonomy and
mapping also helps to provide an easy way for new practitioners to understand
this complex area of research.Comment: 46 pages, 16 figures, Technical Repor
Effective interprocess communication (IPC) in a real-time transputer network
The thesis describes the design and implementation of an interprocess communication (IPC)
mechanism within a real-time distributed operating system kernel (RT-DOS) which is
designed for a transputer-based network. The requirements of real-time operating systems
are examined and existing design and implementation strategies are described. Particular
attention is paid to one of the object-oriented techniques although it is concluded that these
techniques are not feasible for the chosen implementation platform. Studies of a number of
existing operating systems are reported. The choices for various aspects of operating system
design and their influence on the IPC mechanism to be used are elucidated. The actual design
choices are related to the real-time requirements and the implementation that has been
adopted is described. [Continues.
DIVE on the internet
This dissertation reports research and development of a platform for Collaborative Virtual Environments (CVEs). It has particularly focused on two major challenges: supporting the rapid development of scalable applications and easing their deployment on the Internet. This work employs a research method based on prototyping and refinement and promotes the use of this method for application development. A number of the solutions herein are in line with other CVE systems. One of the strengths of this work consists in a global approach to the issues raised by CVEs and the recognition that such complex problems are best tackled using a multi-disciplinary approach that understands both user and system requirements.
CVE application deployment is aided by an overlay network that is able to complement any IP multicast infrastructure in place. Apart from complementing a weakly deployed worldwide multicast, this infrastructure provides for a certain degree of introspection, remote controlling and visualisation. As such, it forms an important aid in assessing the scalability of running applications. This scalability is further facilitated by specialised object distribution algorithms and an open framework for the implementation of novel partitioning techniques.
CVE application development is eased by a scripting language, which enables rapid development and favours experimentation. This scripting language interfaces many aspects of the system and enables the prototyping of distribution-related components as well as user interfaces. It is the key construct of a distributed environment to which components, written in different languages, connect and onto which they operate in a network abstracted manner. The solutions proposed are exemplified and strengthened by three collaborative applications. The Dive room system is a virtual environment modelled after the room metaphor and supporting asynchronous and synchronous cooperative work. WebPath is a companion application to a Web browser that seeks to make the current history of page visits more visible and usable. Finally, the London travel demonstrator supports travellers by providing an environment where they can explore the city, utilise group collaboration facilities, rehearse particular journeys and access tourist information data
The Anatomy of the Grid - Enabling Scalable Virtual Organizations
"Grid" computing has emerged as an important new field, distinguished from
conventional distributed computing by its focus on large-scale resource
sharing, innovative applications, and, in some cases, high-performance
orientation. In this article, we define this new field. First, we review the
"Grid problem," which we define as flexible, secure, coordinated resource
sharing among dynamic collections of individuals, institutions, and
resources-what we refer to as virtual organizations. In such settings, we
encounter unique authentication, authorization, resource access, resource
discovery, and other challenges. It is this class of problem that is addressed
by Grid technologies. Next, we present an extensible and open Grid
architecture, in which protocols, services, application programming interfaces,
and software development kits are categorized according to their roles in
enabling resource sharing. We describe requirements that we believe any such
mechanisms must satisfy, and we discuss the central role played by the
intergrid protocols that enable interoperability among different Grid systems.
Finally, we discuss how Grid technologies relate to other contemporary
technologies, including enterprise integration, application service provider,
storage service provider, and peer-to-peer computing. We maintain that Grid
concepts and technologies complement and have much to contribute to these other
approaches.Comment: 24 pages, 5 figure
Analysis of current middleware used in peer-to-peer and grid implementations for enhancement by catallactic mechanisms
This deliverable describes the work done in task 3.1, Middleware analysis: Analysis of current middleware used in peer-to-peer and grid implementations for enhancement by catallactic mechanisms from work package 3, Middleware Implementation. The document is divided in four parts: The introduction with application scenarios and middleware requirements, Catnets middleware architecture, evaluation of existing middleware toolkits, and conclusions. -- Die Arbeit definiert Anforderungen an Grid und Peer-to-Peer Middleware Architekturen und analysiert diese auf ihre Eignung für die prototypische Umsetzung der Katallaxie. Eine Middleware-Architektur für die Umsetzung der Katallaxie in Application Layer Netzwerken wird vorgestellt.Grid Computing
Communication Architecture For Distributed Interactive Simulation (CADIS): Rationale Document Draft
Report on necessary communication system protocol data unit standards which must be accepted and adopted for supporting distributed interactive simulation
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