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Zooming Innovation in Consumer Technologies Conference (ZINC)

作者： Petkovic, Predrag Valeev, Timur Basicevic, Ilija RT RK Inst Comp Based Syst Novi Sad Serbia Univ Novi Sad Fac Tech Sci Novi Sad Serbia

ISBN: (纸本)9798350349153;9798350349160

This study addresses the challenges of enhancing caching efficiency for DSM-CC Data Carousel BIOP messages within the Android TV Broadcast Stack virtual file system. Digital Storage Media Command and Control (DSM-CC) protocols, crucial for managing digital storage media's bitstream, face significant efficiency issues, especially in broadcast systems where data transmission is unidirectional. The research focuses on developing innovative approaches to optimize caching mechanisms, reducing latency, and improving performance in accessing multimedia content. By proposing a strategic caching method and a dynamic approach to manage output stream capacities, the study presents a solution that significantly mitigates the problems associated with the traditional caching of large files and the reuse of cache data. Evaluation results demonstrate the effectiveness of these approaches in enhancing system performance and reliability, highlighting their potential to contribute to the advancement of digital broadcasting technologies. This work not only lays the groundwork for future research in more adaptive and efficient caching strategies but also enhances the user experience in digital broadcasting systems.

关键词： DSM-CC Android TV Broadcast Stack virtual file system Data Carousel Object Carousel BIOP Message Caching Efficiency Digital Broadcasting

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GRAVY:: Towards virtual file system for the grid

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2nd International Conference on Grid and Pervasive Computing

作者： Nguyen, Thi-Mai-Huong Magoules, Frederic Revillon, Cedric Ecole Cent Paris Grande Voie Vignes Appl Math & Syst Lab F-92295 Chatenay Malabry France United Devices Europe F-92807 Puteaux La Defense France

ISBN: (纸本)9783540723592

Today large-scale applications require access to data stored in heterogeneous storage systems located at geographically distributed virtual organizations. In such applications, users are forced to deal with different administrative policies and structures at each site, and various data access mechanisms on each storage system. This implies a lot of human interventions in order to develop dedicated programs and scripts for data transfer between theses systems. This paper presents GRid-enAbled virtual file system (GRAVY) architecture which enables the automation of data transfers between distributed file systems irrespective of their heterogeneity. This feature enables high-level schedulers integrated with GRAVY to control data placements like computational jobs. GRAVY supports multiple data access protocols and provides an easy-to-use interface for novice Grid users.

关键词： virtual file system grid-computing data management interoperability middleware

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Optimization of Small Sized file Access Efficiency in Hadoop Distributed file system by Integrating virtual file system Layer

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INTERNATIONAL JOURNAL OF ADVANCED COMPUTER SCIENCE AND APPLICATIONS 2022年第6期13卷 204-210页

作者： Alange, Neeta Mathur, Anjali Koneru Lakshmaiah Educ Fdn KL Deemed Univ Dept Comp Sci & Engn Vaddeswaram Andhra Pradesh India

Storage for large datasets, handling data in different formats and data getting generated with high speed are the major highlights of the Hadoop because of which the Hadoop got invented. Hadoop is the solution for the big data problems as discussed above. In order to give the improved solution (in terms of access efficiency and time) for small sized files, this solution is proposed. A novel approach called VFS-HDFS architecture is designed in which the focus is on optimization of small sized files access problems with significant development compared with the existing solutions i.e. HDFS sequence files, HAR, NHAR. In the proposed work a virtual file system layer has been added as a wrapper over the top of existing HDFS architecture. However, the research work is carried out without altering the existing HFDS architecture. In this paper drawbacks of existing techniques i.e. Flat file Technique and Table Chain Technique which are implemented in HDFS HAR, NHAR, sequence file is overcome by using Bucket Chain Technique. The files to merge in a single bucket are selected using ensemble classifier which is a combination of different classifiers. Combination of multiple classifiers gives the better accurate results. Using this proposed system, better results are obtained compared with the existing system in terms of access efficiency of small sized files in HDFS.

关键词： HDFS Small sizes files virtual file system bucket chain ensemble classifiers text classification

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Enhancement of cooperation between file systems and applications — VFS extensions for optimized performance

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Science China(Information Sciences) 2015年第9期58卷 46-55页

作者： WANG Li LIAO XiangKe XUE JingLing WEIL Sage WEN YunChuan YANG XueJun School of Computer Science and Technology National University of Defense Technology School of Computer Science and Engineering University of New South Wales

Modern operating systems incorporate an abstract layer called virtual file system(VFS), which is positioned between user applications and real file systems to hide the differences of various file systems and to expose generic application interfaces for requesting file system services. However, VFS sometimes does not give applications an opportunity to pass information to file systems to help them make correct optimization decisions. In this paper, we review the Linux VFS, discuss its deficiencies and propose several extensions to allow applications to cooperate with the file systems more efficiently. We introduce simple prefetching interfaces and advisory flags to allow applications to communicate application-related semantics to VFS and/or the underlying file systems. These suggestions, which neither affect the semantics of applications nor modify their programming models, not only lead to simple VFS/file systems but also guide them to make correct performance-related decisions, if required. We demonstrate that these interfaces and flags are also easy to implement and can boost application performance by up to 4.29 X.

关键词： virtual file system metadata cache dentry cache page cache page readahead

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Transparent access to Grid resources for user software

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CONCURRENCY AND COMPUTATION-PRACTICE & EXPERIENCE 2006年第7期18卷 787-801页

作者： Klous, Sander Frey, Jaime Son, Se-Chang Thain, Douglas Roy, Alain Livny, Miron van den Brand, Jo NIKHEF NL-1009 DB Amsterdam Netherlands Univ Wisconsin Dept Comp Sci Madison WI 53706 USA

Grid computing promises access to large amounts of computing power, but so far adoption of Grid computing has been limited to highly specialized experts for three reasons. First, users are used to batch systems, and interfaces to Grid software are often complex and different to those in batch systems. Second, users are used to having transparent file access, which Grid software does not conveniently provide. Third, efforts to achieve wide-spread coordination of computers while solving the first two problems is hampered when clusters are on private networks. Here we bring together a variety of software that allows users to almost transparently use Grid resources as if they were local resources while providing transparent access to files, even when private networks intervene. As a motivating example, the BaBar Monte Carlo production system is deployed on a truly distributed environment, the European DataGrid, without any modification to the application itself. Copyright (c) 2005 John Wiley & Sons, Ltd.

关键词： Grid computing high-energy physics virtual file system user interface Monte Carlo production

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New approach to global data access in computational infrastructures

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FUTURE GENERATION COMPUTER systemS-THE INTERNATIONAL JOURNAL OF ESCIENCE 2021年 125卷 575-589页

作者： Wrzeszcz, Michal Dutka, Lukasz Slota, Renata G. Kitowski, Jacek Acad Comp Ctr CYFRONET AGH Nawojki 11 PL-30950 Krakow Poland AGH Univ Sci & Technol Fac Comp Sci Elect & Telecommun Inst Comp Sci Al Mickiewicza 30 PL-30059 Krakow Poland

Data access and management on a large, global scale is currently at the center of scientific interest. This follows from the need for data access from multi- and hybrid-cloud applications. In most cases existing solutions provide sufficient functionality to scale computing resources but scaling resources in terms of efficient data access e.g. for data-intensive applications is still not comprehensively resolved. In this paper, we present a new approach to global data access that supports the execution of data-intensive applications on globally distributed heterogeneous resources provided and managed by independent providers. We identify the functionality, representation, and processing of contextual information in the form of metadata, and the organization of data, resulting in four models describing the details of the approach. An experimental evaluation of this approach is discussed. We show overheads for single- and multi-site environments, system scalability, and usage of context awareness to achieve desired behavior proving insignificant overhead introduced by the system. The results confirm usability of the approach to supporting computations in heterogeneous environments with unified access to data distributed worldwide achieved by using broad contextual information. (C) 2021 Elsevier B.V. All rights reserved.

关键词： Data-intensive computing Open data Clouds virtual file system Data access system Decentralized systems Heterogeneous storage systems

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RepoFS: file system view of Git repositories

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SOFTWAREX 2019年 9卷 288-292页

作者： Salis, Vitalis Spinellis, Diomidis Natl Tech Univ Athens Athens Greece Athens Univ Econ & Business Athens Greece

Empirical software engineering work often involves studying revision control system repositories maintained using the popular Git system. Checking out each revision one wants to study is inefficient. On the other hand the examination of directories and files of past revisions using Git's commands suffers from a usability perspective. We introduce RepoFs, a tool that exposes a Git repository as a virtual user-level file system. Commits, branches, and tags appear as separate directory trees allowing them to be efficiently processed through command-line tools and file explorers. We illustrate these points through motivating examples and discuss the advantages and drawbacks of the proposed approach. (C) 2019 The Authors. Published by Elsevier B.V.

关键词： Git virtual file system Mining software repositories Unix shell

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TOOLPACK - AN EXPERIMENTAL SOFTWARE-DEVELOPMENT ENVIRONMENT RESEARCH-PROJECT

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IEEE TRANSACTIONS ON SOFTWARE ENGINEERING 1983年第6期9卷 673-685页

作者： OSTERWEIL, LJ Dep. Comput. Sci. Univ. Colorado Boulder CO 80309 USA

This paper discusses the goals and methods of the Toolpack project and in this context discusses the architecture and design of the software system being produced as the focus of the project. Toolpack is presented as an experimental activity in which a large software tool environment is being created for the purpose of general distribution and then careful study and analysis.

关键词： virtual file system Experimentation With Prototypes Fortran Portable Software Programming Environments Software Tools

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Onedata - a Step Forward towards Globalization of Data Access for Computing Infrastructures 15

Onedata - a Step Forward towards Globalization of Data Acces...

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15th Annual International Conference on Computational Science (ICCS)

作者： Dutka, Lukasz Wrzeszcz, Michal Lichon, Tomasz Slota, Rafal Zemek, Konrad Trzepla, Krzysztof Opiola, Lukasz Slota, Renata Kitowski, Jacek AGH Univ Sci & Technol Acad Comp Ctr Cyfronet AGH Krakow Poland AGH Univ Sci & Technol Dept Comp Sci Krakow Poland

To satisfy requirements of data globalization and high performance access in particular, we introduce the originally created onedata system which virtualizes storage systems provided by storage resource providers distributed globally. onedata introduces new data organization concepts together with providers' cooperation procedures that involve use of Global Registry as a mediator. The most significant features include metadata synchronization and on-demand file transfer.

关键词： virtual file system heterogeneous storage systems Grid distributed systems

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A New Hybrid Storage system Base on Openstack

A New Hybrid Storage System Base on Openstack

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International Conference on Mechatronics Engineering and Computing Technology (ICMECT)

作者： Wu Dingwei Wu Qiang Fu XiCheng Ye Zhizhong Lin Jialun Hainan Med Univ Affiliated Hosp Haikou 570102 Hainan Peoples R China Huazhong Univ Sci & Technol Mech Engn Huazhong Wuhan 430074 Hubei Peoples R China Hainan Inst Sci & Technol Hainan 570000 Peoples R China Hainan Inst Sci & Technol Hainan 570216 Peoples R China

ISBN: (纸本)9783038351153

In recent years, hybrid storage has gradually become a hotspot in the research of data storage owing to its high-performance and low cost. An OpenStack-based hybrid storage system is presented in this paper. According to the characteristics, the data is divided into small data, big data and temporary data in this hybrid storage system;meanwhile a storage strategy, combining database storage system, the virtual file system and servers file system, is designed. In the application of iCampus project, this proposed hybrid storage system shows better performance and higher efficiency than the traditional single storage systems.

关键词： hybrid storage cloud computing OpenStack virtual file system

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