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distributed CHECKPOINTING FOR GLOBALLY CONSISTENT STATES OF databaseS

IEEE TRANSACTIONS ON SOFTWARE ENGINEERING 1989年第10期15卷 1157-1167页

作者： SON, SH AGRAWALA, AK UNIV MARYLAND DEPT COMP SCICOLLEGE PKMD 20742

The goal of checkpointing in database management systems is to save database states on a separate secure device so that the database can be recovered when errors and failures occur. Recently, the possibility of having a checkpointing mechanism which does not interfere with the transaction processing has been studied [4], [7]. Users are allowed to submit transactions while the checkpointing is in progress, and the transactions are performed in the system concurrently with the checkpointing process. This property of noninterference is highly desirable to real-time applications, where restricting transaction activity during the checkpointing operation is in many cases not feasible. In this paper, a new algorithm for checkpointing in distributed database systems is proposed and its correctness is proved. The practicality of the algorithm is discussed by analyzing the extra work- load and the robustness of it with respect to site failures. [ABSTRACT FROM AUTHOR]

关键词： Availability checkpoint consistency distributed database noninterference recovery transaction

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W-Grid: A scalable and efficient self-organizing infrastructure for multi-dimensional data management, querying and routing in wireless data-centric sensor networks

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JOURNAL OF NETWORK AND COMPUTER APPLICATIONS 2012年第4期35卷 1218-1234页

作者： Moro, Gianluca Monti, Gabriele Univ Bologna Cesena Dept Elect Comp Sci & Syst DEIS I-47521 Cesena FC Italy

Data-centric sensor networks are advanced ad hoc networks that act like a distributed database managing and indexing sensed data in order to efficiently perform advanced in-network tasks, such as routings, searches, data processing, fusion and analysis. The supplied distributed services, such as routing, content location and information sharing should be provided anywhere and at any time optimizing energy consumptions, computational resources, memory occupation and radio transmissions. Moreover, the network traffic should be equally balanced among participants in order to avoid premature discharge of some devices that may partition the network. This work describes a fully decentralized infrastructure able to self-organize nodes in ad hoc networks by exploiting local interactions and topology learning among devices. In this solution all nodes are peers and nothing prevent the approach to be used in wireless mesh networks as well. Differently from existing solutions, our proposal does not require global information or external help, such as the Global Positioning System, which works only outdoor with a precision and an efficacy both limited by weather conditions and obstacles. The infrastructure natively enables devices to perform routing and data management without using message broadcast/flooding operations. The work introduces also a feature, called full learning, that improves routing performances while balancing the traffic among devices. We report an extensive number of simulations comparing the new solution results with four existing proposals, two of which deriving from preceding versions of the infrastructure. (C) 2011 Elsevier Ltd. All rights reserved.

关键词： Sensor networks Multi-dimensional data Routing Self-organization distributed database

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AMMA information system: an efficient cross-disciplinary tool and a legacy for forthcoming projects

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ATMOSPHERIC SCIENCE LETTERS 2011年第1期12卷 149-154页

作者： Fleury, Laurence Boichard, Jean-Luc Brissebrat, Guillaume Cloche, Sophie Eymard, Laurence Mastrorillo, Laurence Moulaye, Oumarou Ramage, Karim Asencio, Nicole Coppeaux, Jean Devic, Marie-Pierre Favot, Florence Ginoux, Karine Lafore, Jean-Philippe Polcher, Jan Redelsperger, Jean-Luc Roussot, Odile Tyteca, Michel CNRS OMP Data Ctr Toulouse France Meteo France GAME URA CNRS Toulouse France IPSL IPSL Data Ctr CNRS Palaiseau France IPSL LOCEAN CNRS Paris France AGRHYMET Reg Ctr Niamey Niger IPSL CNRS LMD Paris France

In the framework of the African Monsoon Multidisciplinary Analyses (AMMA) programme, several tools have been developed in order to facilitate and speed up data and information exchange between researchers from different disciplines. The AMMA information system includes a multidisciplinary user-friendly distributed data management and distribution system, a reports and quick looks archive associated with a display website and scientific papers exchange systems. All the applications have been developed by several French institutions and fully duplicated in Niamey, Niger. Copyright (C) 2010 Royal Meteorological Society

关键词： interdisciplinarity distributed database bibliography database campaign website

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CoralDB: A Collaborative database for Data Sharing Based on Permissioned Blockchain

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IEEE TRANSACTIONS ON MOBILE COMPUTING 2024年第9期23卷 8886-8901页

作者： Li, Weimin Tian, Weihong Yan, Zhengmao Li, Zitong Gao, Jie Wu, Fan Liu, Jianxun Chen, Wenxiong Ren, Ju Hunan Univ Humanities Sci & Technol Sch Informat Loudi 417000 Peoples R China Carleton Univ Sch Informat Technol Ottawa ON K1S 5B6 Canada Cent South Univ Sch Comp Sci & Engn Changsha 410083 Peoples R China Hunan Normal Univ Coll Informat Sci & Engn Changsha 410081 Hunan Peoples R China Tsinghua Univ Dept Comp Sci & Technol Beijing 10084 Peoples R China

Systems that integrate distributed databases and existing blockchain platforms have recently emerged, which conveniently leverage their respective strengths to build efficient, secure, and usable data sharing and collaboration environments for different organizations. However, the performance of such systems can be limited by the native blockchain platforms due to the high latency of transactions. In this article, we present CoralDB, a bottom-up fully redesigned hybrid system of blockchain and database, aimed at enabling untrusted organizations to collaborate and share data efficiently and securely at the database level. The storage layer of CoralDB ensures data security and system throughput through key modules such as customized block structure, consensus mechanism, and transaction pool. On top of the storage layer, a database layer is introduced, which extends the blockchain of the storage layer by incorporating connection pools, collaborative tables, and query interfaces, to enhance the usability and efficiency of data collaboration and sharing. Extensive experimental results demonstrate that CoralDB provides security assurances at the level of blockchain and enables efficient decentralized data collaboration and sharing.

关键词： Blockchain data collaboration data sharing distributed database efficiency security Blockchain data collaboration data sharing distributed database efficiency security

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Querying distributed multimedia databases and data sources for sensor data fusion

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IEEE TRANSACTIONS ON MULTIMEDIA 2004年第5期6卷 687-702页

作者： Chang, SK Costagliola, G Jungert, E Orciuoli, F Univ Pittsburgh Dept Comp Sci Pittsburgh PA 15260 USA Univ Salerno Dipartimento Matemat & Informat I-84100 Salerno Italy FOA Swedish Def Res Inst SE-17290 Linkoping Sweden Univ Salerno Dipartimento Ingn Informaz & Matemat Applicata I-84100 Salerno Italy

Sensor data fusion imposes a number of novel requirements on query languages and query processing techniques. A spatial/temporal query language called SigmaQL has been proposed to support the retrieval and fusion of multimedia information from multiple sources and databases. In this paper we investigate fusion techniques, multimedia data transformations and SigmaQL query processing techniques for sensor data fusion. Fusion techniques including fusion by the merge operation, the detection of moving objects, and the incorporation of belief values, have been developed. An experimental prototype has been implemented and tested to demonstrate the feasibility of these techniques.

关键词： data fusion distributed database multimedia database query language query processing sensor data fusion

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An update algorithm for replicated signaling databases in wireless and advanced intelligent networks

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IEEE TRANSACTIONS ON COMPUTERS 1997年第3期46卷 362-367页

作者： Leung, KK AT and T Laboratories Holmdel NJ USA

In the Personal Communication Networks (PCN), and the Universal Personal Telecommunications (UPT) services and possibly other services offered by the Advanced Intelligent Networks (AIN), customer records for call routing and other signaling functions can be distributed and replicated at multiple sites to improve access delay and system availability. We observe that these applications can tolerate data inconsistency among replicated records for a short period of time because the main consequence of accessing obsolete data is a small probability of call misroute. By exploiting this observation, we propose the Primary-Writer Protocol (PWP) as the concurrency control and commitment protocol for updating the replicated databases. The fraction of calls misrouted under the PWP is analyzed. Our results reveal that the fraction of calls misrouted under the PWP is very small for the expected customer behavior in the PCN (wireless networks), and the UPT and other AIN services.

关键词： advanced intelligent networks concurrency control distributed database mobility management replicated database signaling database signaling networks update protocols wireless networks

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CPDE: A Methodology for the Transparent Distribution of Centralized Smart Grid Programs

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IEEE TRANSACTIONS ON PARALLEL AND distributed SYSTEMS 2021年第2期32卷 342-354页

作者： Nguyen, Thi Thanh Quynh Bobineau, Christophe Debusschere, Vincent Giap, Quang Huy Hadjsaid, Nouredine Univ Grenoble Alpes CNRS Grenoble INP Inst EngnG2Elab F-38000 Grenoble France Univ Grenoble Alpes CNRS Grenoble INP Inst EngnLIG F-38000 Grenoble France Univ Sci & Technol Univ Danang Fac Elect Engn Danang Vietnam

Control and management in smart grids are facing many challenges such as scalability, heterogeneity and technology innovation. This requires a transformation from the traditional centralised paradigm into a distributed one. In this article, a new distributed programming methodology, called Centralised Programming and distributed Execution (CPDE), is proposed. CPDE relies on (i) the abstraction of the whole system as a distributed database;(ii) the use of the Smartlog declarative and reactive rule based language for expressing data manipulation;and (iii) the automatic Smartlog rule distribution according to data distribution. It thus provides a simple and straightforward mean for distributed programming. A centralised algorithm of fair over-voltage regulation of PV systems is used as a typical smart grids study case to validate the methodology and to compare it with centralized implementations. The experiments are implemented in a real-time simulation platform with a network of Raspberry Pis. In addition to showing its correctnes and ease of use, the performance of the CPDE implementation is studied, as well as its sensitivity to the increasing number of computing units and the data distribution. Results are promising and show the clear benefits of this methodology compared to more classical implementations.

关键词： distributed programming CPDE methodology distributed database declarative language Smartlog smart grid

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A PRIORITY BASED distributed DEADLOCK DETECTION ALGORITHM

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IEEE TRANSACTIONS ON SOFTWARE ENGINEERING 1985年第1期11卷 67-80页

作者： SINHA, MK NATARAJAN, N National Centre for Software Development and Computing Techniques Tata Institute of Fundamental Research

Deadlock handling is an important part of transaction management in a database system. An algorithm is presented for detecting deadlocks in a distributed database system. It uses priorities for transactions to minimize the number of messages initiated for detecting deadlocks. It does not construct any wait-for graph but follows the edges of the graph to detect cycles (edge-chasing). It does not find any phantom deadlock (in the absence of failures), and for the resolution of deadlocks it does not need any additional calculation. The algorithm also incorporates a post-resolution computation that leaves information characterizing dependence relations of remaining transactions in the system's deadlock cycle; this will aid in detecting and resolving future deadlocks. Using the algorithm, it is possible to compute the exact number of messages generated for a given deadlock configuration. The basic algorithm is presented; then, it is extended to take into account shared and exclusive lock modes, simultaneous acquisition of multiple locks, and nested transactions.

关键词： Transaction Deadlock Deadlock Detection distributed database Nested Transaction Priority Timestamp

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MassBank: a public repository for sharing mass spectral data for life sciences

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JOURNAL OF MASS SPECTROMETRY 2010年第7期45卷 703-714页

作者： Horai, Hisayuki Arita, Masanori Kanaya, Shigehiko Nihei, Yoshito Ikeda, Tasuku Suwa, Kazuhiro Ojima, Yuya Tanaka, Kenichi Tanaka, Satoshi Aoshima, Ken Oda, Yoshiya Kakazu, Yuji Kusano, Miyako Tohge, Takayuki Matsuda, Fumio Sawada, Yuji Hirai, Masami Yokota Nakanishi, Hiroki Ikeda, Kazutaka Akimoto, Naoshige Maoka, Takashi Takahashi, Hiroki Ara, Takeshi Sakurai, Nozomu Suzuki, Hideyuki Shibata, Daisuke Neumann, Steffen Iida, Takashi Tanaka, Ken Funatsu, Kimito Matsuura, Fumito Soga, Tomoyoshi Taguchi, Ryo Saito, Kazuki Nishioka, Takaaki Keio Univ Inst Adv Biosci Yamagata 9970035 Japan Univ Tokyo Grad Sch Frontier Sci Chiba 2778561 Japan RIKEN Plant Sci Ctr Kanagawa 2300045 Japan Nara Inst Sci & Technol Grad Sch Informat Sci Nara 6300192 Japan Eisai & Co Ltd Biomarkers & Personalized Med Core Funct Unit Eisai Prod Creat Syst Tsukuba Ibaraki 3002635 Japan CREST JST Kawaguchi Saitama 3320012 Japan Univ Tokyo Grad Sch Med Tokyo 1130033 Japan Kyoto Univ Grad Sch Pharmaceut Sci Kyoto 6068501 Japan Res Inst Prod Dev Kyoto 6060805 Japan Kazusa DNA Res Inst Chiba 2920818 Japan Leibniz Inst Plant Biochem D-06120 Halle Germany Nihon Univ Coll Humanities & Sci Tokyo 1568550 Japan Toyama Univ Inst Nat Med Toyama 9300194 Japan Univ Tokyo Grad Sch Engn Tokyo 1138656 Japan Fukuyama Univ Fac Life Sci & Biotechnol Hiroshima 7290292 Japan

MassBank is the first public repository of mass spectra of small chemical compounds for life sciences (<3000 Da). The database contains 605 electron-ionization mass spectrometry(EI-MS), 137 fast atom bombardment MS and 9276 electrospray ionization (E51)-MSn data of 2337 authentic compounds of metabolites, 11 545 EI-MS and 834 other-MS data of 10 286 volatile natural and synthetic compounds, and 3045 ESI-MS2 data of 679 synthetic drugs contributed by 16 research groups (January 2010). ESI-MS2 data were analyzed under nonstandardized, independent experimental conditions. MassBank is a distributed database. Each research group provides data from its own MassBank data servers distributed on the Internet. MassBank users can access either all of the MassBank data or a subset of the data by specifying one or more experimental conditions. In a spectral search to retrieve mass spectra similar to a query mass spectrum, the similarity score is calculated by a weighted cosine correlation in which weighting exponents on peak intensity and the mass-to-charge ratio are optimized to the ESI-MS2 data. MassBank also provides a merged spectrum for each compound prepared by merging the analyzed ESI-MS2 data on an identical compound under different collision-induced dissociation conditions. Data merging has significantly improved the precision of the identification of a chemical compound by 21-23% at a similarity score of 0.6. Thus, MassBank is useful for the identification of chemical compounds and the publication of experimental data. Copyright (C) 2010 John Wiley & Sons, Ltd.

关键词： MassBank public database distributed database metabolite spectral similarity

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The methodology of knowledge acquisition and modeling for troubleshooting in automotive braking system

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ROBOTICS AND COMPUTER-INTEGRATED MANUFACTURING 2012年第1期28卷 24-34页

作者： Liang, Janus S. Yung Ta Inst Technol & Commerce Dept Vehicle Engn Linlo 909 Ping Tung Taiwan

This study introduces a methodology of knowledge acquisition and modeling for troubleshooting in automotive braking system. It is essential for constructing a knowledge base that can be maintained and shared. A knowledge base should not merely be a set of rules, but a framework of troubleshooting that can be controlled and customized by rules. For the construction of a knowledge base, identifying the types of knowledge components to be included is a prerequisite. To identify the knowledge components, this study employs a modeling methodology consisting of three sub-models: instance model, functional model and dynamic model. In addition, mechanisms for maintaining dependency relations of the troubleshooting descriptions at different locations and reasoning using the knowledge at different locations are also developed. The system is implemented using an object-oriented programming language. The proposed methodology is applied to the troubleshooting in automotive braking system. (C) 2011 Elsevier Ltd. All rights reserved.

关键词： Automotive braking system Knowledge acquisition Rule-based troubleshooting distributed database Knowledge base modeling

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