Peer-to-peer discovery of computational resources for Grid applications

2005 ◽  
Author(s):  
A.S. Cheema ◽  
M. Muhammad ◽  
I. Gupta
Keyword(s):  
Peer To Peer ◽  
Grid Applications ◽  
Computational Resources

A PEER-TO-PEER COMMUNICATION INFRASTRUCTURE FOR GROUPWARE APPLICATIONS

2008 ◽  
Vol 17 (04) ◽  
pp. 523-554 ◽  
Author(s):  
PABLO GOTTHELF ◽  
ALEJANDRO ZUNINO ◽  
MARCELO CAMPO
Keyword(s):  
High Capacity ◽  
Propagation Delay ◽  
Delay Group ◽  
Peer To Peer ◽  
The Internet ◽  
Communication Infrastructure ◽  
Asynchronous Collaboration ◽  
Membership Management ◽  
Computational Resources ◽  
Home Users

Many advances have been done to allow groups of people to work together and collaborate in the Internet. Collaborative systems are characterized by the way participants interact. In many cases, equal standing members should cooperate in a non-authoritative environment, where no entity or authority is or should be in charge of regulating the group. Therefore, decentralized communication infrastructures have been hailed as promising alternatives. Recently, decentralized infrastructures based on P2P approaches have drawn the attention of the research community because of their benefits in terms of scalability, robustness, availability and potentials for leveraging computational resources distributed across the Internet. In this paper, a scalable peer-to-peer (P2P) communication Infrastructure for groupware applications is presented. It enables a large number of people to join and cooperate in a robust, decentralized and easy deployable way, without requiring high capacity servers or any other special network infrastructure. The communication infrastructure is based on a binary tree as overlay structure, which implements all groupware communication functionality, including membership management and packet forwarding, at application level, making it an inexpensive and fast deployable solution for equal standing members, such as home users with a domestic connection to the Internet. Two applications, one for synchronous groupware and the other for asynchronous collaboration, have been developed to validate the approach. Comparisons with other communication infrastructures in aspects such as end-to-end propagation delay, group latency, throughput, protocol overhead, failure recovery and link stress, show that our approach is a scalable and robust alternative.

PROGRAM DEVELOPMENT FOR COMPUTATIONAL GRIDS USING SKELETONS AND PERFORMANCE PREDICTION

2002 ◽  
Vol 12 (02) ◽  
pp. 157-174 ◽  
Author(s):  
MARTIN ALT ◽  
HOLGER BISCHOF ◽  
SERGEI GORLATCH
Keyword(s):  
Performance Prediction ◽  
Computational Grid ◽  
Computational Grids ◽  
Programming System ◽  
Challenging Problem ◽  
Predicting Performance ◽  
Grid Applications ◽  
And Performance ◽  
High Level ◽  
Computational Resources

We address the challenging problem of algorithm and program design for the Computational Grid by providing the application user with a set of high-level, parameterised components called skeletons. We descrile a Java-based Grid programming system in which algorithmns are composed of skeletons and the computational resources for executing individual skeletons are chosen using performance prediction. The advantage of our approach is that skeletons are reusable for different applications and that skeletons' implementation can be tuned to particular machines. The focus of this paper is on predicting performance for Grid applications constructed using skeletons.

scholarly journals AUTOMATIC MAPPING OF ASSIST APPLICATIONS USING PROCESS ALGEBRA

2008 ◽  
Vol 18 (01) ◽  
pp. 175-188
Author(s):  
MARCO ALDINUCCI ◽  
ANNE BENOIT
Keyword(s):  
Large Scale ◽  
Process Algebra ◽  
Dynamic Nature ◽  
Programming Environments ◽  
Automatic Mapping ◽  
Grid Applications ◽  
Grid Application ◽  
High Level ◽  
Computational Resources ◽  
Grid Resources

Grid technologies aim to harness the computational capabilities of widely distributed collections of computers. Due to the heterogeneous and dynamic nature of the set of grid resources, the programming and optimisation burden of a low level approach to grid computing is clearly unacceptable for large scale, complex applications. The development of grid applications can be simplified by using high-level programming environments. In the present work, we address the problem of the mapping of a high-level grid application onto the computational resources. In order to optimise the mapping of the application, we propose to automatically generate performance models from the application using the process algebra PEPA. We target applications written with the high-level environment ASSIST, since the use of such a structured environment allows us to automate the study of the application more effectively.

Enabling dynamic composition and coordination for autonomic Grid applications using the Rudder Agent framework

2006 ◽  
Vol 21 (3) ◽  
pp. 221-230 ◽  
Author(s):  
ZHEN LI ◽  
MANISH PARASHAR
Keyword(s):  
Experimental Evaluation ◽  
Peer To Peer ◽  
Distributed Environments ◽  
Decentralized Coordination ◽  
Dynamic Composition ◽  
Agent Interaction ◽  
Grid Applications ◽  
Agent Coordination ◽  
Negotiation Protocols

This paper introduces Rudder, a peer-to-peer agent framework for supporting autonomic applications in decentralized distributed environments. The framework provides agents to discover, select, and compose elements, and defines agent interaction and negotiation protocols to enable appropriate application behaviors to be negotiated and enacted dynamically. The implementations of these protocols as well as agent coordination and negotiation activities are supported by Comet, a scalable decentralized coordination substrate. The operation and experimental evaluation of Rudder is presented.

Practical electron tomography

1995 ◽  
Vol 53 ◽  
pp. 742-743
Author(s):  
C.L. Woodcock
Keyword(s):  
Electron Tomography ◽  
Tomographic Reconstruction ◽  
Three Dimensional ◽  
3D Shape ◽  
Computational Resources ◽  
Shape Of Particles

Despite the potential of the technique, electron tomography has yet to be widely used by biologists. This is in part related to the rather daunting list of equipment and expertise that are required. Thanks to continuing advances in theory and instrumentation, tomography is now more feasible for the non-specialist. One barrier that has essentially disappeared is the expense of computational resources. In view of this progress, it is time to give more attention to practical issues that need to be considered when embarking on a tomographic project. The following recommendations and comments are derived from experience gained during two long-term collaborative projects.Tomographic reconstruction results in a three dimensional description of an individual EM specimen, most commonly a section, and is therefore applicable to problems in which ultrastructural details within the thickness of the specimen are obscured in single micrographs. Information that can be recovered using tomography includes the 3D shape of particles, and the arrangement and dispostion of overlapping fibrous and membranous structures.

Experten aus Erfahrung

PADUA ◽  
2016 ◽  
Vol 11 (1) ◽  
pp. 65-71 ◽  
Author(s):  
Jörg Haslbeck
Keyword(s):  
Soziale Unterstützung ◽  
Peer To Peer

Zusammenfassung. In der Gesundheitsversorgung von Menschen, die mit chronischen Krankheiten leben, wird soziale Unterstützung durch «peers» immer bedeutsamer, d. h. durch Personen, die aufgrund ähnlicher Krankheits- und Alltagserfahrungen in einer vergleichbaren Lebenssituation sind. Welche Potenziale, Chancen sowie Grenzen hat «peer-to-peer healthcare» im Kontext von Selbstmanagementförderung? Der Beitrag diskutiert dies anhand von Erfahrungen mit dem Stanford Kursprogramm «Gesund und aktiv leben».

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