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检索条件"主题词=distributed Database"

共 516 条记录，以下是81-90 订阅

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SardineDB: A distributed database on the Edge of the Network 5th

SardineDB: A Distributed Database on the Edge of the Network

引用

5th Asia-Pacific Web (APWeb) and Web-Age Information Management (WAIM) International Joint Conference on Web and Big Data

作者： Dong, Min Zhong, Haozhao Sun, Boyu Bi, Sheng Cai, Yi South China Univ Technol Sch Comp Sci & Engn Guangzhou 510006 Guangdong Peoples R China Minist Educ Key Lab Big Data & Intelligent Robot Guangzhou 510006 Guangdong Peoples R China South China Univ Technol Sch Software Engn Guangzhou 510006 Guangdong Peoples R China

ISBN: (纸本)9783030858995;9783030858988

In the past few years, the number of sensors is rapidly increasing on the edge of the network. IoT(Internet of things) devices play not only data producers but also data consumers. It is valuable to deploy a distributed database on the edge of the network. However, flash memory is the mainstream storage medium on the edge, which is different from cloud environment. Flash memory can wear out through repeated writes while large amount of data are written on the edge per day. Thus, in this paper, SardineDB is presented, which is a decentralized distributed database optimized for edge. The engine of SardineDB is Sardine-Core, which is a flash-optimized key-value separation storage based on LevelDB. SardineCore has low GC (garbage collection) burden, which can be used to low the write amplification and improve the write performance on the edge. From evaluation results, the write performance and random read performance of SardineDB have great advantages compared with existing distributed databases on the edge. As a result, SardineDB is very suitable for edge because it has high write performance, low GC burden and low write amplification.

关键词： IOT Edge computing LevelDB distributed database Sensor Flash memory

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A Sampling Algorithm for Mining Association Rules in distributed database

A Sampling Algorithm for Mining Association Rules in Distrib...

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1st International Workshop on database Technology and Applications

作者： Shi Yue-mei Hu Guo-hua Xinzhou Teachers Univ Dept Comp Xztc Xinzhou Peoples R China

ISBN: (纸本)9780769536040

This paper introduces SMA, a sampling algorithm for mining association rules in distributed database. SMA adopts two-way sampling technique in every website and amalgamates those local samples into a sampling dataset. In an empirical study, SMA was able to accelerate the speed and improve the accuracy of mining association rules in distributed database.

关键词： sampling association rules distributed database

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Is distributed database Evaluation Cloud-Ready? 1

引用

21st European Conference on Advances in databases and Information Systems (ADBIS)

作者： Seybold, Daniel Domaschka, Joerg Ulm Univ Inst Informat Resource Management Ulm Germany

ISBN: (数字)9783319671628

ISBN: (纸本)9783319671628;9783319671611

The database landscape has significantly evolved over the last decade as cloud computing enables to run distributed databases on virtually unlimited cloud resources. Hence, the already non-trivial task of selecting and deploying a distributed database system becomes more challenging. database evaluation frameworks aim at easing this task by guiding the database selection and deployment decision. The evaluation of databases has evolved as well by moving the evaluation focus from performance to distribution aspects such as scalability and elasticity. This paper presents a cloud-centric analysis of distributed database evaluation frameworks based on evaluation tiers and framework requirements. It analysis eight well adopted evaluation frameworks. The results point out that the evaluation tiers performance, scalability, elasticity and consistency are well supported, in contrast to resource selection and availability. Further, the analysed frameworks do not support cloud-centric requirements but support classic evaluation requirements.

关键词： NoSQL distributed database database evaluation Cloud

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An Intelligent Microgrid Energy Management System Using distributed database and IEEE 1888 40

An Intelligent Microgrid Energy Management System Using Dist...

引用

40th Annual IEEE Computer Software and Applications Conference Symposium (COMPSAC) / Symposium on Software Engineering Technology and Applications (SETA)

作者： Zhu, Yuanbo Maurath, Dominic Zhang, Longqi Devika, Nanmagalam Koh, Leong Hai Choo, Fook Hoong Nanyang Technol Univ Energy Res Inst NTU ERI N Singapore 637141 Singapore

ISBN: (纸本)9781467388450

This paper proposes an intelligent microgrid energy management system (iEMS). It aims to develop and demonstrate an intelligent system at campus site through seamless integration of energy generation, storage and demand management facilities across the electric, thermal, and gas networks. This system will also have an enhanced information and communication technology (ICT) platform for supply and demand management as well as real-time energy market interactions. The major innovations proposed by the iEMS encompass advanced ICT tools such as forecasting, predictive modelling for harmonization of multi-energy grids and enabling real-time energy market interactions for maximizing cost savings without compromising operational effectiveness and grid stability. These innovations serve to either enhance system level energy savings or facilitate system integration by using advanced distributed database system and protocols such as IEEE 1888 for communication and control.

关键词： Energy management system distributed energy resources distributed database IEEE 1888 microgrid

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Simulation and Analysis of Performance Prediction in distributed database Design using OO Approach

Simulation and Analysis of Performance Prediction in Distrib...

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3rd IEEE International Advance Computing Conference (IACC)

作者： Jagannatha, S. Reddy, S. Vijaya Prakash Kumar, T. V. Suresh Kanth, K. Rajani MSRIT Dept Comp Applicat Bangalore Karnataka India MSRIT ISE Dept Comp Applicat Bangalore Karnataka India

ISBN: (纸本)9781467345286

distributed databases have become necessity in the organizations, as applications are require data locally rather than remote locations. It is important to place data where the applications are required to process data. Data fragmentation and placement becomes a critical performance issue in distributed database design that has to be placed at different sites based on the usage of data. The performance of the application would become assessed and improved if it is properly fragment and allocate data during early design stages. In this paper, we proposed an algorithm by performing vertical fragmentation technique for the distributed database design for assessing the performance during early design stages. We simulated the algorithm with the case study. We used the proposed algorithm, Attribute Usage Matrix, and Random Number Generation technique for generating the values of Request Query, Arrival of Request, and Query generation. The Simulation results which helps the DBA to assess the performance of the proposed distributed database Design. The tool which helps the DBA to select the optimum design.

关键词： distributed database Vertical Fragmentation database Design UML and Attribute Usage Matrix

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A causal-phase protocol to order soft real-time transactions in a distributed database

A causal-phase protocol to order soft real-time transactions...

引用

26th Annual IEEE Conference on Local Computer Networks

作者： Sadeg, B Amanton, L Saad-Bouzefrane, S Fac Sci & Tech Havre LIH F-76600 Le Havre France

ISBN: (纸本)0769513212

Real-time database applications are distributed in nature. Incorporating distributed data into a real-time database framework incurs complexity, associated with transaction concurrency control and database recovery in a distributed context. This article presents an algorithm that manages soft real-time transactions in a distributed database. It uses a specific causal-ordering protocol to ensure the precedence relationships between transactions. Our algorithm is based on a technique, which subdivides transactions into sets. Then the protocol virtually serializes the executions on distributed servers by, using causal phase ordering properties. Causal phases are created according to transactions conflicts that may occur between transactions sets. Transactions of the same phase are scheduled according to their criticality, and transactions of two successive phases are ensured to commit in a causal partial order. This strategy, permits to reduce the execution time, allowing more transactions meeting their deadlines.

关键词： causal phase soft real-time transaction serialization commit protocol distributed database virtual synchrony

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Non-Replicated Dynamic Fragment Allocation in distributed database Systems

引用

1st International Conference on Computer Science and Information Technology

作者： Mukherjee, Nilarun Bengal Inst Technol Dept CSE IT Kolkata W Bengal India

ISBN: (纸本)9783642178566

distributed databases have become the most essential technology for recent business organizations. The performance, efficiency and availability of a distributed database largely depend on the fragmentation of global relations and the allocation of those fragments at several sites of the network. In Non-Replicated fragment allocation scenario, the optimum allocation of the fragments is the only way, which can be exploited to increase the performance, efficiency, reliability and availability of the distributed database. In this paper, a new dynamic fragment allocation algorithm is proposed in Non-Replicated allocation scenario, which incorporates access threshold, time constraints of database accesses and most importantly the volume of data transmitted to dynamically reallocate fragments to sites at runtime in accordance with the changing access probabilities of nodes to fragments. It will decrease the migration of fragments and data transfer cost and will also improve the overall performance by dynamically reallocating fragments in a most intuitive manner.

关键词： distributed database Fragmentation Dynamic Fragment Allocation Local Agent Root Agent

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Construction of distributed database Prototype for Real time data Synchronization Method under Improved ABC Algorithm 2

Construction of Distributed Database Prototype for Real time...

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2nd IEEE International Conference on Integrated Circuits and Communication Systems, ICICACS 2024

作者： Xu, Huan Liang, Yingwei Chen, Bin Digital Department of China Southern Power Grid Guangzhou Guangzhou China Information Center of Guangdong Power Grid Guangzhou Guangzhou China

ISBN: (纸本)9798350317558

At present, with the rapid development of the information industry, database technology has been greatly affected, and distributed database systems have gradually emerged. This article explains in detail the implementation of the ABC (Artistic Bee Colony) algorithm, starting from the overall system diagram, and the data processing of the system is explained in detail. On this basis, this paper proposes a data warehouse model based on XML (eXtensible Markup Language), and simulates the model. This article also expounds the application of ETL (Extract Transform Load) and XML technology in data transmission, and points out that this mechanism has the characteristics of high efficiency and reliability. In a normal network, the number of failures is 3, and the average time between failures is 999 hours. The synchronization mechanism in this article can reduce the pressure on computers that use technologies such as data warehouses for synchronization. © 2024 IEEE.

关键词： Data Warehouse Model distributed database Improved ABC Algorithm Prototype Construction Real-time Data Synchronization

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Research and Implementation of Parallel CART Algorithm Based on distributed database 6

Research and Implementation of Parallel CART Algorithm Based...

引用

2023 IEEE 6th International Conference on Information Systems and Computer Aided Education, ICISCAE 2023

作者： Wang, Jie The Open University of Guangdong School of Artificial Intelligence Guangzhou China

ISBN: (纸本)9798350313444

This paper presents a parallel CART method for multivariate association query. The amount of communication information is reduced by performing two semi-joins. This method adopts a multi-node parallel method, which greatly speeds up the execution efficiency of the system. The sequence of operations generated by this algorithm has global optimization characteristics. One of its important development trends is to realize effective data query by optimizing the database. The simulation experiment proves that the method has fast processing speed, high node utilization rate and strong practicability. This method is suitable for large data processing. © 2023 IEEE.

关键词： distributed database optimization algorithm parallel CART algorithm query processing

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distributed database System Query Optimization Algorithm Research

Distributed Database System Query Optimization Algorithm Res...

引用

2010 3rd IEEE International Conference on Computer Science and Information Technology—ICCSIT 2010

作者： Fan Yuanyuan Department of Computer and Information Engineering Jiaozuo Teachers College Mi Xifeng Department of Computer and Information Engineering Jiaozuo Teachers College

Query optimization is an important part of database management *** this paper,through the research on query optimization technology,based on a number of optimization algorithms commonly used in distributed query,a new algorithm is designed,and experiments show that this algorithm can significantly reduce the amount of intermediate result data,effectively reduce the network communication cost,to improve the optimization efficiency.

关键词： distributed database query optimization optimization algorithms

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