Random Approach to Optimization of Overlay Public-Resource Computing Systems

The growing need for computationally demanding systems triggers the development of various network-oriented computing systems organized in a distributed manner. In this work we concentrate on one kind of such systems, i.e. public-resource computing systems. The considered system works on the top of an overlay network and uses personal computers and other relatively simple electronic equipment instead of supercomputers. We assume that two kinds of network flows are used to distribute the data in the public-resource computing systems: unicast and peer-to-peer. We formulate an optimization model of the system. After that we propose random algorithms that optimize jointly the allocation of computational tasks and the distribution of the output data. To evaluate the algorithms we run numerical experiments and present results showing the comparison of the random approach against optimal solutions provided by the CPLEX solver

FERRAMENTA DE BACKUP TRANSPARENTE BASEADA EM P2P

Com o avanço da tecnologia houve um aumento significativo na quantidade de arquivos armazenados em formatos digitais, como fotos, áudio ou mesmo documentos de importância comercial. A falta de uma rotina de backup pode gerar sérios problemas para os donos destes arquivos. Este artigo apresenta uma ferramenta de backup transparente ao usuário utilizando a tecnologia de rede P2P que, aproveitando a conectividade existente entre computadores, simplifique os trabalhos de backup

Yabi: An online research environment for grid, high performance and cloud computing

Background There is a significant demand for creating pipelines or workflows in the life science discipline that chain a number of discrete compute and data intensive analysis tasks into sophisticated analysis procedures. This need has led to the development of general as well as domain-specific workflow environments that are either complex desktop applications or Internet-based applications. Complexities can arise when configuring these applications in heterogeneous compute and storage environments if the execution and data access models are not designed appropriately. These complexities manifest themselves through limited access to available HPC resources, significant overhead required to configure tools and inability for users to simply manage files across heterogenous HPC storage infrastructure. Results In this paper, we describe the architecture of a software system that is adaptable to a range of both pluggable execution and data backends in an open source implementation called Yabi. Enabling seamless and transparent access to heterogenous HPC environments at its core, Yabi then provides an analysis workflow environment that can create and reuse workflows as well as manage large amounts of both raw and processed data in a secure and flexible way across geographically distributed compute resources. Yabi can be used via a web-based environment to drag-and-drop tools to create sophisticated workflows. Yabi can also be accessed through the Yabi command line which is designed for users that are more comfortable with writing scripts or for enabling external workflow environments to leverage the features in Yabi. Configuring tools can be a significant overhead in workflow environments. Yabi greatly simplifies this task by enabling system administrators to configure as well as manage running tools via a web-based environment and without the need to write or edit software programs or scripts. In this paper, we highlight Yabi's capabilities through a range of bioinformatics use cases that arise from large-scale biomedical data analysis. Conclusion The Yabi system encapsulates considered design of both execution and data models, while abstracting technical details away from users who are not skilled in HPC and providing an intuitive drag-and-drop scalable web-based workflow environment where the same tools can also be accessed via a command line. Yabi is currently in use and deployed at multiple institutions and is available at http://ccg.murdoch.edu.au/yabi

Deployment of Flower-CDN

Flower-CDN is a Peer-to-Peer Content Distribution Network (P2P CDN) that enables any under-provisionned website to distribute its content by relying on the community interested in its content. Therefore the deployment of Flower-CDN is supported by the clients that are willing to contribute in behalf of the website of their interest. This report provides the first guidelines to make Flower-CDN available for public use. We propose to implement Flower-CDN functionality as an extension for the user's web browser. As such, the user enjoys a transparent, flexible and highly configurable experience with Flower-CDN. Furthermore, we design an implementation architecture that covers security and privacy issues in a simple and practical manner

ARQUITECTURA EN CAPAS PARA EL DESARROLLO DE UNA APLICACIÓN BASADA EN REDES PEER-TO-PEER

RESUMEN Hoy en día las redes Peer-To-Peer están cobrando gran importancia no sólo por su capacidad para compartir recursos entre varios nodos de una red, sino también por sus capacidades sobre la comunicación instantánea y la computación distribuida. Una aplicación basada en una red Peer-To-Peer debe tener características especiales que le permitan manejar el comportamiento de la red en general, así como controlar las comunicaciones entre los nodos y servicios que se prestan entre éstos nodos. Para alcanzar los resultados esperados en el desarrollo de cualquier solución software es fundamental disponer de una arquitectura que facilite el desarrollo, elimine al máximo los puntos de error evitando la redundancia de código, y esté acorde con el problema. Este artículo propone una arquitectura software en capas para aplicaciones basadas en redes Peer-to-Peer que permita alcanzar las metas de diseño y funcionalidad de una manera eficiente, de fácil entendimiento y que sobretodo, pueda ser una solución escalable para que el desarrollo de otras funcionalidades sobre ésta arquitectura sea posible. Dentro de la arquitectura propuesta en este artículo se toma como base el Framework JXTA basado en J2SE de Sun Microsystems para el desarrollo de un software que utiliza una red P2P.  PALABRAS CLAVE: Redes P2P, Arquitectura de aplicación, Framework JXTA, Swing Application Framework.  ABSTRACT Today networks Peer-To-Peer are gaining great importance not only for his ability to share resources among multiple nodes of a network, but also by their abilities on instant communication and distributed computing. An application based on a network Peer-To-Peer must have special features that enable it to handle behavior of the network in general, as well as monitor communications between nodes and services provided between these nodes. We know that to achieve the expected results in the development of any software solution is essential to have an architecture that facilitates development, remove the most points of error avoiding redundancy code, and is commensurate with the problem. This article proposes a layered software architecture for network-based applications Peer-to- Peer to achieve the goals of design and functionality of an efficient, easy understanding and above all, can be a scalable solution for the development of other features on this architecture possible. Within the architecture proposed in this paper is taken as the basis Framework JXTA based on J2SE Sun Microsystems to develop software that uses a P2P network.  KEY WORDS: P2P Networks, architecture application,Framewok JXTA, Swing Application Framework

ARQUITECTURA EN CAPAS PARA EL DESARROLLO DE UNA APLICACIÓN BASADA EN REDES PEER-TO-PEER

RESUMEN Hoy en día las redes Peer-To-Peer están cobrando gran importancia no sólo por su capacidad para compartir recursos entre varios nodos de una red, sino también por sus capacidades sobre la comunicación instantánea y la computación distribuida. Una aplicación basada en una red Peer-To-Peer debe tener características especiales que le permitan manejar el comportamiento de la red en general, así como controlar las comunicaciones entre los nodos y servicios que se prestan entre éstos nodos. Para alcanzar los resultados esperados en el desarrollo de cualquier solución software es fundamental disponer de una arquitectura que facilite el desarrollo, elimine al máximo los puntos de error evitando la redundancia de código, y esté acorde con el problema. Este artículo propone una arquitectura software en capas para aplicaciones basadas en redes Peer-to-Peer que permita alcanzar las metas de diseño y funcionalidad de una manera eficiente, de fácil entendimiento y que sobretodo, pueda ser una solución escalable para que el desarrollo de otras funcionalidades sobre ésta arquitectura sea posible. Dentro de la arquitectura propuesta en este artículo se toma como base el Framework JXTA basado en J2SE de Sun Microsystems para el desarrollo de un software que utiliza una red P2P.  PALABRAS CLAVE: Redes P2P, Arquitectura de aplicación, Framework JXTA, Swing Application Framework.  ABSTRACT Today networks Peer-To-Peer are gaining great importance not only for his ability to share resources among multiple nodes of a network, but also by their abilities on instant communication and distributed computing. An application based on a network Peer-To-Peer must have special features that enable it to handle behavior of the network in general, as well as monitor communications between nodes and services provided between these nodes. We know that to achieve the expected results in the development of any software solution is essential to have an architecture that facilitates development, remove the most points of error avoiding redundancy code, and is commensurate with the problem. This article proposes a layered software architecture for network-based applications Peer-to- Peer to achieve the goals of design and functionality of an efficient, easy understanding and above all, can be a scalable solution for the development of other features on this architecture possible. Within the architecture proposed in this paper is taken as the basis Framework JXTA based on J2SE Sun Microsystems to develop software that uses a P2P network.  KEY WORDS: P2P Networks, architecture application,Framewok JXTA, Swing Application Framework