Dynamic Data Dissemination Using Multi-Query Optimization in Distributed Databases
نویسندگان
چکیده
01 Chapter 1: Introduction 02 Chapter 2: An Overview of Query Processing 04 Chapter 3: DDAG 08 Chapter 4: Distributed Query Optimization 10 Chapter 5: View Materialization using DDAG 11 Chapter 6: View Replacement 16 Chapter 7: Results 17 Chapter 8: Conclusion and Future Work 19 References 20
منابع مشابه
Relational Databases Query Optimization using Hybrid Evolutionary Algorithm
Optimizing the database queries is one of hard research problems. Exhaustive search techniques like dynamic programming is suitable for queries with a few relations, but by increasing the number of relations in query, much use of memory and processing is needed, and the use of these methods is not suitable, so we have to use random and evolutionary methods. The use of evolutionary methods, beca...
متن کاملOptimization of majority protocol for controlling transactions concurrency in distributed databases by multi-agent systems
In this paper, we propose a new concurrency control algorithm based on multi-agent systems which is an extension of majority protocol. Then, we suggest a clustering approach to get better results in reliability, decreasing message passing and algorithm’s runtime. Here, we consider n different transactions working on non-conflict data items. Considering execution efficiency of some different...
متن کاملA Methodology for Query Processing over Distributed XML Databases
The constant increase in the volume of data stored as native XML documents makes fragmentation techniques an important alternative to the performance issues in query processing over these data. Fragmented databases are feasible only if there is a transparent way to query the distributed database, without the need of knowing the fragmentation details and where each fragment is located. This pape...
متن کاملRedesign Based Optimization for Distributed Databases
The execution process of the queries in distributed databases require accurate estimations and predictions for performance characteristics. The problems of data allocation and query optimization done by means of mobile agents and evolutionary algorithms are considered. These problems still present a challenge because of the dynamic changes in number of components and architectural complexity of...
متن کاملScalable multi-query optimization for exploratory queries over federated scientific databases
The diversity and large volumes of data processed in the Natural Sciences today has led to a proliferation of highlyspecialized and autonomous scientific databases with inherent and often intricate relationships. As a user-friendly method for querying this complex, ever-expanding network of sources for correlations, we propose exploratory queries. Exploratory queries are loosely-structured, hen...
متن کامل