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Author: University of Wisconsin--Madison. Computer Sciences Dept Publisher: ISBN: Category : Parallel processing (Electronic computers) Languages : en Pages : 20
Book Description
Abstract: "Aggregates are rife in real life SQL queries. However, in the parallel query processing literature aggregate processing has received surprisingly little attention; furthermore, the way current parallel database systems do aggregate processing is far from optimal in many scenarios. We describe two hashing based algorithms for parallel evaluation of aggregates. A performance analysis via an analytical model and an implementation on the Intel Paragon multi-computer shows that each works well for some aggregation selectivities but poorly for the remaining. Fortunately, where one does poorly the other does well and vice-versa. Thus, the two together cover all possible selectivities. We show how, using sampling, an optimizer can decide which of the two algorithms to use for a particular query. Finally, we investigate the impact of data skew on the performance of these algorithms."
Author: University of Wisconsin--Madison. Computer Sciences Dept Publisher: ISBN: Category : Parallel processing (Electronic computers) Languages : en Pages : 20
Book Description
Abstract: "Aggregates are rife in real life SQL queries. However, in the parallel query processing literature aggregate processing has received surprisingly little attention; furthermore, the way current parallel database systems do aggregate processing is far from optimal in many scenarios. We describe two hashing based algorithms for parallel evaluation of aggregates. A performance analysis via an analytical model and an implementation on the Intel Paragon multi-computer shows that each works well for some aggregation selectivities but poorly for the remaining. Fortunately, where one does poorly the other does well and vice-versa. Thus, the two together cover all possible selectivities. We show how, using sampling, an optimizer can decide which of the two algorithms to use for a particular query. Finally, we investigate the impact of data skew on the performance of these algorithms."
Author: David Taniar Publisher: John Wiley & Sons ISBN: 0470391359 Category : Computers Languages : en Pages : 575
Book Description
The latest techniques and principles of parallel and grid database processing The growth in grid databases, coupled with the utility of parallel query processing, presents an important opportunity to understand and utilize high-performance parallel database processing within a major database management system (DBMS). This important new book provides readers with a fundamental understanding of parallelism in data-intensive applications, and demonstrates how to develop faster capabilities to support them. It presents a balanced treatment of the theoretical and practical aspects of high-performance databases to demonstrate how parallel query is executed in a DBMS, including concepts, algorithms, analytical models, and grid transactions. High-Performance Parallel Database Processing and Grid Databases serves as a valuable resource for researchers working in parallel databases and for practitioners interested in building a high-performance database. It is also a much-needed, self-contained textbook for database courses at the advanced undergraduate and graduate levels.
Book Description
Euro-Par 2005 was the eleventh conference in the Euro-Par series. It was organized by the Centre for Informatics and Information Technology (CITI) and the Department of Informatics of the Faculty of Science and Technology of Universidade Nova de Lisboa, at the Campus of Monte de Caparica.
Author: Michael Jaedicke Publisher: Springer ISBN: 3540455078 Category : Computers Languages : en Pages : 163
Book Description
During the last few years, parallel object-relational database management systems have emerged as the leading data management technology on the market. These systems are extensible by user-defined data types and user-defined functionality for the data. This work focuses on the efficient parallel execution of user-defined functionality. The main contributions describe techniques to support data parallelism for user-defined scalar and aggregate functions and intra-function parallelism for the execution of a scalar function on a large object, and a new technology to provide extensibility with regard to new set-oriented database operations that can efficiently implement user-defined functionality in parallel object-relational database management systems.
Author: Prith Banerjee Publisher: Springer Science & Business Media ISBN: 3540669078 Category : Computers Languages : en Pages : 419
Book Description
This book constitutes the refereed proceedings of the 6th International Conference on High Performance Computing, HiPC'99, held in Calcutta, India in December 1999. The 20 revised full papers and 40 short papers presented were carefully reviewed and selected from 112 submissions. The papers are organized in sections on architecture/compilers, cluster computing, compilers and tools, scheduling, parallel algorithms, mobile computing, parallel applications, and interconnection networks.
Author: Barbara Catania Publisher: Springer Science & Business Media ISBN: 3642283233 Category : Technology & Engineering Languages : en Pages : 355
Book Description
This research book presents key developments, directions, and challenges concerning advanced query processing for both traditional and non-traditional data. A special emphasis is devoted to approximation and adaptivity issues as well as to the integration of heterogeneous data sources. The book will prove useful as a reference book for senior undergraduate or graduate courses on advanced data management issues, which have a special focus on query processing and data integration. It is aimed for technologists, managers, and developers who want to know more about emerging trends in advanced query processing.
Author: Hongjun Lu Publisher: Institute of Electrical & Electronics Engineers(IEEE) ISBN: Category : Computers Languages : en Pages : 400
Book Description
Provides readers with a background knowledge of parallel database query processing and optimization and covers recent developments in the field. Subjects include design approaches, architecture of parallel database systems, parallel sorting, parallel processing of join, data skew and load balancing,
Author: Bob Hertzberger Publisher: Springer ISBN: 3540482288 Category : Computers Languages : en Pages : 733
Book Description
This book constitutes the refereed proceedings of the 9th International Conference on High-Performance Computing and Networking, HPCN Europe 2001, held in Amsterdam, The Netherlands in June 2001. The 67 revised papers and 15 posters presented were carefully reviewed and selected from a total of almost 200 submissions. Among the areas covered are Web/grid applications of HPCN, end user applications, computational science, computer science, and Java in HPCN.
Author: Joseph M. Hellerstein Publisher: MIT Press ISBN: 9780262693141 Category : Computers Languages : en Pages : 884
Book Description
The latest edition of a popular text and reference on database research, with substantial new material and revision; covers classical literature and recent hot topics. Lessons from database research have been applied in academic fields ranging from bioinformatics to next-generation Internet architecture and in industrial uses including Web-based e-commerce and search engines. The core ideas in the field have become increasingly influential. This text provides both students and professionals with a grounding in database research and a technical context for understanding recent innovations in the field. The readings included treat the most important issues in the database area--the basic material for any DBMS professional. This fourth edition has been substantially updated and revised, with 21 of the 48 papers new to the edition, four of them published for the first time. Many of the sections have been newly organized, and each section includes a new or substantially revised introduction that discusses the context, motivation, and controversies in a particular area, placing it in the broader perspective of database research. Two introductory articles, never before published, provide an organized, current introduction to basic knowledge of the field; one discusses the history of data models and query languages and the other offers an architectural overview of a database system. The remaining articles range from the classical literature on database research to treatments of current hot topics, including a paper on search engine architecture and a paper on application servers, both written expressly for this edition. The result is a collection of papers that are seminal and also accessible to a reader who has a basic familiarity with database systems.
Author: University of Wisconsin--Madison. Computer Sciences Dept
Author: University of Wisconsin--Madison. Computer Sciences Dept
Author: David Taniar
Author: José C. Cunha
Author: Michael Jaedicke
Author: A. R. Hurson
Author: Prith Banerjee
Author: Barbara Catania
Author: Hongjun Lu
Author: Bob Hertzberger
Author: Joseph M. Hellerstein