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Supporting three of the four main user communities of the Large Hadron Collider (LHC) at CERN, RO-07-NIPNE is the most complex grid site of the Romanian Tier-2 Federation (RO-LCG, http://lcg.nipne.ro). Here we present an overview of the recent hardware, software and network implementations at the grid site, in view of the computational support for the second run of the LHC. Special emphasis is placed...
Cloud computing is being used in every domain like business, industries, corporate sectors. Through cloud computing one can access hardware and software promptly through internet. Application of cloud computing in libraries is a relatively new area as compared to its applications in business and corporate sector. Libraries all over the world are moving towards cloud computing implementation to use...
The long-dreamed vision of “computing as a utility” has finally taken shape in the form of cloud computing. This paradigm shift is the biggest buzz in today's computer world. It can be thought of an evolution of existing technologies rather than a revolution. The basic requirements of cloud are to meet the various needs of enterprise organizations such as scalability, adaptability, extensibility and...
The demand in computing and Internet has been increasing since the day of invention. The continuous increase in needs of computerised infrastructure and internet framework has led to big demands for computer experts. In the present day there is a big implementation of hardware along with software. Although has been a significant improvement in reducing the size of hardware and increasing the capacity...
In a multi-organization environment like the GRID, each institute might want to apply some boundaries on how its resources are being utlized by other institutes. A disagreement between the multi-Virtual Organizations (VOs) might happen in the security aspect for the policy framework. Mobile Grid Services has given the ability to move jobs, data and application software from nodes to nodes during jobs...
Services and Infrastructures monitoring is a crucial issue in a distributed computing environment that involves all the Grid architecture layers, from the network to the single application service. In this paper we propose a multi layer model that aims to integrate monitoring applications of different subsystems and to offer management and resource presentation services to the end-user and to system...
To backup the remote education service, the software architecture of IPTV Set-Top device embedding Grid-CDN (Content Delivery Network) based on mesh-pull P2P (Peer-to-Peer) technology has been identified. In this paper, we proposed a method supporting a remote education service such as 1:1 or 1:N between subscribers over IPTV service networks, and implemented on a IPTV Set-Top device. In addition,...
Energy consumption of data centers has been in-creasing continuously during the last years due to rising demands of computational power especially in current Grid- and Cloud-Computing systems. One promising approach of reducing this energy consumption is the consolidation of servers by virtualization. Many low loaded computer systems are virtualized and run on few physical servers for reducing the...
Energy consumption is an increasingly important consideration in computing. High-performance computing environments consume substantial amounts of energy, at an increasing financial and environmental cost. We explore the possibility of reducing the energy consumption of a grid of heterogeneous computers through appropriate resource allocation strategies. We examine a number of possible grid workload...
The paper presents a technical solution to issue proxy certificate for grid end users using hardware and software token in grid systems. These tokens consist of user identity certificate and keys associated with the certificate. The discussion is initiated with the adoption of current solution; MyProxy as a generator of proxy certificate and credential repository for grid systems. Ongoing efforts...
Data distribution, storage and access are essential to CPU-intensive and data-intensive high performance Grid computing. A newly emerged file system, Hadoop distributed file system (HDFS), is deployed and tested within the Open Science Grid (OSG) middleware stack. Efforts have been taken to integrate HDFS with other Grid tools to build a complete service framework for the Storage Element (SE). Scalability...
The field of modeling and simulation was long-time seen as a viable alternative to develop new algorithms and technologies and to enable the development of large-scale distributed systems, where analytical validations are prohibited by the nature of the encountered problems. The use of discrete-event simulators in the design and development of large scale distributed systems is appealing due to their...
To simplify computer management, several system administrators are adopting advanced techniques to manage software configuration on grids, but the tight coupling between hardware and software makes every PC an individual managed entity, lowering the scalability and increasing the costs to manage hundreds or thousands of PCs. This paper discusses the feasibility of a distributed virtual machine environment,...
In order to test the proposed distributed intrusion detection system there is a need for sufficient hardware and software in place as to provide a reasonable approximation of the actual conditions that such a system would expect to encounter if deployed in a live environment. These hardware and software requirements are compounded when attempting to test a distributed grid computing system because...
We describe a general purpose master-worker parallel computation Python module called PyMW. PyMW is intended to support rapid development, testing and deployment of large scale master-worker style computations on a desktop grid or volunteer computing environment. This module targets non-expert computer users by hiding complicated task submission and result retrieval procedures behind a simple interface...
Cloud Computing has taken commercial computing by storm. However, adoption of cloud computing platforms and services by the scientific community is in its infancy as the performance and monetary cost-benefits for scientific applications are not perfectly clear. This is especially true for desktop grids (aka volunteer computing) applications. We compare and contrast the performance and monetary cost-benefits...
Cloud services that provide virtualized computational clusters present a dichotomy of systems management challenges, as the virtual clusters may be owned and administered by one entity, while the underlying physical fabric may belong to a different entity. On the physical fabric, scalable tools that ldquopushrdquo configuration changes and software updates to the compute nodes are effective, since...
The increasing businesses and customers in financial industry require the stronger capability of computing and data processing. But it will result in the increase of cost on IT and aggravate enterprises' burden. The traditional enterprise information system has not met the increasing demands of the financial enterprises. It is urgent to make full use of enterprise internal resources. Grid technology...
Researches in network traffic analysis embrace a large diversity of goals and are based on a variety of methodologies and tools. To have a better insight on the real nature and on the evolution of network traffic we argue that fine-grain analysis of real traffic traces have to complement simulations studies as well as coarse grain measurement performed by classical flow measurement systems. In particular,...
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