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The operation and maintenance of large distributed systems that are subject to high QoS conditions has led to the need of designing and developing advanced monitoring tools that facilitate the administration of the critical services required by the user communities. RASSMon is a portable, reliable, secure software platform able to collect monitoring data from multiple sources in heterogeneous environments...
The drastic increase in the commodity computer and network performance for the last generation has a resultant of faster hardware and more sophisticated software. But, the supercomputers of the current generation are still incapable of solving the current problems in the field of science, engineering, and business. This problems arises as a single machine cannot facilitate the availability of various...
The specialists know that the Servers are not equal speeds as it depends on several factors Such as processor speed, bandwidth, congestion. … etc. This means that if we use multiple Servers for the purpose of downloading some files there will be a problem that is the swift Server waits lazy one to complete its task. In this work, adoption new strategy for transformation files, called “Minimizing replica...
The necessity of making a system robust to the uncertainties of the different measures taken from the computing infrastructure is one of the Grid Computing research challenges. In particular, taking relevant information to tasks scheduling from a set of heterogeneous sources and dynamic behavior has been the focus of a significant number of studies. Considering this background, this paper aims to...
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...
Scientific data is often shared among researchers and even reorganized by colleagues or third-party users. Thus, it is essential to provide an adequate degree of access control for such shared data to preserve a desired level of security requirements. In this work, we develop an essential, lightweight access control model for secure data services in a limited distributed setting such as an HPC cluster...
The DIRAC framework (Distributed Infrastructure with Remote Agent Control, [1]) has recently been implemented within the GRIDIFIN site at IFIN-HH/DFCTI [2]. Although intended to become a single access point to heterogeneous computing resources such as grids, HPC clusters and clouds within the Romanian National Grid Infrastructure (NGI-RO, [3]), the local instance of DIRAC was firstly used for the...
During this summer, the new Operations Centre of the Romanian National Grid Infrastructure (NGI-RO) has been implemented at IFIN-HH, under the management of DFCTI and supported by the computing infrastructure of the GRIDIFIN site. The site, which was recently EGI certified, serves three research communities· the experimental groups of the Extreme Light Infrastructure — Nuclear Physics (ELI-NP) project,...
Cloud computing has materialized as a new platform in the field of Computer Science. Its focus is on providing different facilities through its flexible infrastructure. With its vast capabilities, the cloud has expanded itself into various applications. In this paper, we have surveyed 15 papers on cloud computing; analyzing its history, development and future aspects. Our paper summarizes how the...
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...
Grid computing is considered as the upcoming phase of distributed computing. Grid focuses on maximizing the resource utilization of an organization by sharing them across application. Ingrid computing, job scheduling is an important task. Load balancing and resource allocation are vital issues that must be considered in a grid computing environment. Load balancing is the technique which distributes...
Peer-to-peer model is one of the commonly used model for distributed computing. Some of the peers are having demand for certain resources some others may be having additional capacity of resources. Peers may have limitations on the number of concurrent connections (degree). In the present work allocation problem of peers having demand, capacity and degree is considered. The problem is to find an allocation...
Cloud computing is a model for enabling ubiquitous, convenient, on-demand network access to a shared pool of configurable computing resources that can be rapidly provisioned and released with minimal management effort or service provider interaction. In cloud computing, load balancing is one of the key issues. Load balancing is the process of apportioning the load among various nodes of a distributed...
In a distributed system to coordinate various jobs among processes, there is a need of a Leader Node or Coordinating Node. Selection of coordinator node in distributed environment plays an important role in the system performance. In the real world, it is not possible that the coordinator node is always available because of some failure occur sometimes it get crashed, out of service. In literature...
The paper presents application of SIP protocol in the context of bag-of-tasks grid architecture. The SIP protocol has been used in realization of the execution management service. The main idea is use of stateful SIP proxy as request broker. The paper provides description of the concept, and the prototype system that has been built, as well as calculation of estimated performance level and it's relation...
The advantages of using virtualization can be impaired if it can not deliver sufficient performance. Running applications in virtualized environment incur performance overheads regarding to the virtualization functionalities like initialization virtual machine image, the booting time of virtual machine, starting, pausing and turning off the virtual machine. Virtualization functionality has implication...
The load balancing problem is one of an open issues for the cloud computing. A good load balancing mechanism enhances the performance of network processing, optimizes the use of resources, and ensures that no overloading a single node or link case. The existing load balancing cloud computing research mainly unilateral the fairness of the transmission network or stand only for the system. Hence, this...
Nowadays, there are different types of computing infrastructures, like grids and volunteer communities, which have distinct needs and the preservation of energy or other resources is chief among them. This paper presents an attempt to incorporate pluggable scheduling into an existing open-source volunteer computing system named BOINC. Our efforts proved valid, as we managed to re-engineer BOINC to...
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...
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