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Message exchange on base of a blockchain-based layered architecture

IT-INFORMATION TECHNOLOGY 2018年第5-6期60卷 253-261页

作者： Roth, Uwe Djoua, Theophane Ngne LIST ITIS Dept Secur & Privacy Grp 5 Ave Hauts Fourneaux L-4362 Esch Sur Alzette Luxembourg T Syst Int GmbH Cyberdef Opereat Ctr Bonn Germany

In this article, we propose an architecture that allows to exchange messages or data via a blockchain solution, while keeping the business process independent from the concrete blockchain. The project is the consequence of a need to have fast development of a blockchain based proof of concept that shows the feasibility of a business process, while knowing that in a future step the underlying blockchain solution has to be replaced for reasons of licensing or maximal data throughput. This is done by providing an architecture on base of layers, similar to the OSI-model, and encapsulates the used blockchain within a wrapper layer that covers all blockchain specific properties and only provides a transparent view on the reading or writing from and to the blockchain. The higher layers reimplement point-to-point communication and introduce confidentiality by the use of encryption techniques. The architecture has been tested and proven by implementing two different blockchain solutions that are shielded by specific wrapper layer implementations. This wrapper layer is responsible for the fragmentation of the sent data and their encapsulation into the concrete blockchain solution. The reconstruction of the data takes care of the data fragments being sent potentially out of order or being incomplete. A payload layer is introduced to provide pointto-point communication and to embed the main message inside a message structure. In collaboration with underlying layer it identifies for which message one is not the addressee and allow the underling layer to stop collecting unnecessary data. A crypto-layer finally provides ways of encrypting messages for one or many recipients. Having fixed layers not only allows to replace the underlying blockchain solution but also to extend or replace the other layers in case new security features or optimized protocols need to embedded. The proposed solution does not allow to use specific features like smart contracts and only provides undeniable

关键词： Blockchain OSI-model layered network architecture distributed database message exchange

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Research on distributed Storage and Query Optimization of Multi-source Heterogeneous Meteorological Data 18

Research on Distributed Storage and Query Optimization of Mu...

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International Conference on Cloud Computing and Internet of Things (CCIOT)

作者： Hu, Xiaodong Xu, Huanli Jia, Jinfang Wang, Xiaoying Qinghai Univ Dept Comp Technol & Applicat Xining 810016 Qinghai Peoples R China

ISBN: (纸本)9781450365765

The growth of massive data makes the real-time data service of meteorological forecast and climate analysis facing severe challenge. distributed database is a good solution to meet the needs for massive multi-source heterogeneous meteorological data storage. Since the current mainstream HBase database fails to support the non-Rowkey query, the poor performance of the real-time query of meteorological data is unsatisfactory. To address this issue, three kinds of distributed data query optimization strategies are proposed in this paper, including query optimization based on secondary index, secondary index query optimization based on hotscore, and query optimization based on the Redis hot data caching strategy. The corresponding experimental results indicate that the search scheme based on the Redis hot data caching strategy has the best performance among the three schemes, not only can meet the needs of meteorological service query, but also can achieve 3-8 times efficiency enhancement than standard HBase.

关键词： distributed database Multi-source heterogeneous meteorological data Non-Rowkey query Redis cache Hot data

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A Hybrid database Approach Using Graph and Relational database 3

A Hybrid Database Approach Using Graph and Relational Databa...

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3rd IEEE International Conference on Research in Intelligent and Computing in Engineering (RICE)

作者： Vyawahare, H. R. Karde, P. P. Thakare, V. M. Sipna COET Dept CSE Amravati India Govt Polytech Dept Informat Technol Amravati India SGBAU Dept MCA Amravati India

ISBN: (纸本)9781538625996

database industry is recently facing a major challenge in gaining scalability and handling multiple databases in one application. Relational database is clearly a well known standard for storing, managing and querying information. It is used in variety of contexts including analytical querying and business intelligence. However, due to enormous growth in distributed databases and massive use of social networks, new requirements have emerged and graph-structured data is becoming more and more important. Graph database can store graph data more naturally. Relational databases and graph databases both have strengths and weaknesses depending on the characteristics of data and the types of queries to be evaluated. However benefits can be taken from mix of both by moderating some of the constraints. Thus propose a design of hybrid model such that the two models are integrated in one system to eliminate the limitations of individual systems. The hybrid system unifies the strengths of relational databases and graph databases by analyzing their strengths and weaknesses. This paper attempts to provide an overview of past investigation on the hybrid database model.

关键词： distributed database graph database hybrid database relational database

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Lessons Learned with Laser Scanning Point Cloud Management in Hadoop HBase 25th

Lessons Learned with Laser Scanning Point Cloud Management i...

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25th Workshop of the European-Group-for-Intelligent-Computing-in-Engineering (EG-ICE)

作者： Anh-Vu Vo Konda, Nikita Chauhan, Neel Aljumaily, Harith Laefer, Debra F. NYU Brooklyn NY 11201 USA Univ Buffalo Buffalo NY 11260 USA Carlos III Univ Madrid Madrid Spain

ISBN: (纸本)9783319916354;9783319916347

While big data technologies are growing rapidly and benefit a wide range of science and engineering domains, many barriers remain for the remote sensing community to fully exploit the benefits provided by these powerful and rapidly developing technologies. To overcome existing barriers, this paper presents the in-depth experience gained when adopting a distributed computing framework - Hadoop HBase - for storage, indexing, and integration of large scale, high resolution laser scanning point cloud data. Four data models were conceptualized, implemented, and rigorously investigated to explore the advantageous features of distributed, key-value database systems. In addition, the comparison of the four models facilitated the reassessment of several well-known point cloud management techniques founded in traditional computing environments in the new context of a distributed, key-value database. The four models were derived from two row-key designs and two columns structures, thereby demonstrating various considerations during the development of a data solution for high-resolution, city-scale aerial laser scan for a portion of Dublin, Ireland. This paper presents lessons learned from the data model design and its implementation for spatial data management in a distributed computing framework. The study is a step towards full exploitation of powerful emerging computing assets for dense spatio-temporal data.

关键词： LiDAR Point cloud Big Data Spatial data management Hadoop HBase distributed database

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A Comprehensive Survey on distributed Transactions based Data Partitioning 4

A Comprehensive Survey on Distributed Transactions based Dat...

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4th International Conference on Computing Communication Control and Automation (ICCUBEA)

作者： Bharati, R. D. Attar, V. Z. Coll Engn Comp Engn & IT Dept Pune Maharashtra India

ISBN: (纸本)9781538652572

distributed Transactional systems need to be fast and scalable to increase the performance of the system. Many distributed databases achieve high throughput and scalability through data partitioning. The paper presents comprehensive survey of different techniques and parameters related to distributed transactions used in the distributed databases. It specifies different ways of partitioning algorithms. The purpose of this review is to study the techniques of horizontal partitioning like range partitioning, schema level partitioning, graph level partitioning etc. giving the high performance and availability of data. The vital aim of these techniques is to reduce distributed transaction and increase scalability of distributed databases.

关键词： distributed database Data Partitioning distributed Transactions

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RESEARCH ON THE CONSTRUCTION OF DATA MANAGEMENT SYSTEM OF MASSIVE SATELLITE IMAGES

RESEARCH ON THE CONSTRUCTION OF DATA MANAGEMENT SYSTEM OF MA...

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International Workshop on Big Geospatial Data and Data Science (BGDDS)

作者： Wang, Huibing Tang, Xinming Shi, Shaoyu Ye, Fanghong Natl Adm Surveying Mapping & Geoinformat Satellite Surveying & Mapping Applicat Ctr Beijing Peoples R China Jiangsu Ctr Collaborat Innovat Geog Informat Res Nanjing Jiangsu Peoples R China Wuhan Univ Sch Resource & Environm Sci Wuhan Hubei Peoples R China

ISBN: (纸本)9781538614372

With the rapid development of aerospace remote sensing technologies, enormous challenges have been brought to the storage organization and high-effective management of the massive satellite images. By analyzing the big-data characteristics of the satellite images, this paper introduced and constructed the distributed database based on cluster storage system with regard to the selection of storage system types, the design of database models and the development of the management system. Focusing on solving the problems, such as the low-speed of imagery big data archiving, inadequate performance of query service and the inefficiency of statistics and analysis, this paper conducted the research on the multi-processor parallel archiving, relation queries on JSON and fast statistics analysis method of grid imagery coverage, and achieved the massive satellite image management with the daily data increment of terabytes and the annual increment of petabytes of data.

关键词： Satellite image cluster storage system distributed database parallel computation NoSQL

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The Analysis and Design of Ship Monitoring System Based on Hybrid Replication Technology

The Analysis and Design of Ship Monitoring System Based on H...

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作者： Jiang Ying Zhang Na Fang Ying Dalian Neusoft University of Information

As the core of informatization,data has a huge significance to the development of information-based *** replication technology is an important approach to solve the problem of enterprise data sharing based on distributed database *** plays a crucial role in promoting business integration of enterprises and institutions,improving data quality,enhancing data sharing and improving the application level of back-end big data analysis [1].It is necessary to do research for making a good data management of the distributed database application system,synchronizing the data to the data,preventing data conflicting and being able to synchronize or asynchronous *** with the database design model of the ship monitoring and control system,this paper mainly described how to complete the construction of distributed database system using Oracle,based on advanced replication technology named as the combination of multi-agent replication and materialized views hybrid replication technology.

关键词： distributed database advanced replication materialized view data conflict

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Implementation of distributed XA Transactions in MyCat Based on Table Broadcasting Mechanism 5

Implementation of Distributed XA Transactions in MyCat Based...

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11th IEEE/ACM International Conference on Utility and Cloud Computing (UCC-Companion) / 5th IEEE/ACM International Conference on Big Data Computing, Applications and Technologies (BDCAT)

作者： Wu, Yingying Liang, Zhenghe Hohai Univ Coll Comp & Informat Nanjing Jiangsu Peoples R China

ISBN: (纸本)9781538655023

With the wide popularity of Internet application, the storage and access of massive data has become one of the problems of system design. Through Mycat, the whole model is mapped to the MySQL instance on each data node and implements transaction processing. However, when using DML to access the global table, a node disconnects if an abnormal situation is encountered. This paper proposes a solution of table broadcasting mechanism for this weak distributed transaction problem in MyCat.

关键词： Table broadcasting mechanism MyCat database middleware distributed database

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Get-a-Doc: A Doctor Recommender System 7

Get-a-Doc: A Doctor Recommender System

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7th International Conference on Reliability, Infocom Technologies and Optimization - Trends and Future Directions (ICRITO)

作者： Singh, Abhinav Kaur, Isha Goyal Parmeet Dabas, Chetna Jaypee Inst Informat Technol Noida India

ISBN: (纸本)9781538646922

A number of web and mobile based applications exist for finding and booking a doctor's appointment through the application. However, these applications list multiple specialists instead of providing the perfect match of doctor according to user preferences. Though the present apps provide filters to shortlist the selection, yet a user needs to browse through the entire list of doctors. Moreover, only a single filter can be applied at once, in general. The current work presents a web-based application, Get-a-doc, which provides a user with the best match out of available doctors according to his preferences. A distributed approach to information retrieval has been employed, whereby the database of doctors' data has been stored on a NoSQL based data store, MongoDb. This database has been sharded, into 3 divisions for scalability of the application. Results demonstrate the efficiency of the proposed approach. Our main motivation for building the project was to reduce the effort and hassle that the user needs to go through when he has to go through a list of doctors, to find a suitable match accoding to his/her needs.

关键词： MongoDB NoSQL K-means Sharding distributed database

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The Semi-join Query Optimization in distributed database System

The Semi-join Query Optimization in Distributed Database Sys...

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2012 National Conference on Information Technology and Computer Science

作者： Lin Zhou Transportation Management College Dalian Maritime University Dalian,China Yan Chen Transportation Management College Dalian Maritime University Dalian,ChinaTaoying Li Transportation Management College Dalian Maritime University Dalian,China Yingying Yu Transportation Management College Dalian Maritime University Dalian,China

In distributed database system,the distributed deposition and redundancy data brought convenient to fault recovery,but they make distributed query processing more complicated at the same *** optimization and processing is one of the key technologies in distributed database *** generally uses semi-join operation to improve the time response performance of query and reduce communication *** paper briefly described the corresponding concepts and characteristics of distributed database system,summarized the goals of distributed database query optimization,and analyzed the query optimization process based on semi-join operation combined with the practical *** addition,it introduced a classical algorithm which is used for multiple connection and query optimization based on the semi-join query optimization,the SDD-1 algorithm.

关键词： distributed database semi-join operation query optimization

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