Xem 1-20 trên 171 kết quả Distribute database
  • In Ebook Principles of Distributed Database Systems defines the fundamental concepts and set the framework for discussing distributed databases. We start by examining distributed systems in general in order to clarify the role of database technology within distributed data processing, and then move on to topics that are more directly related to DDBS.

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  • Bài giảng Distributed Database do TS. Nguyễn Đình Thuân biên soạn giới thiệu về CSDLPT; kiến trúc cơ bản của một cơ sở dữ liệu phân tán; các đặc điểm chính của hệ phân tán; trong suốt phân tán; phương pháp thiết kế CSDL phân tán; lợi ích của CSDLPT;... Mời các bạn tham khảo.

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  • Distributed databases in general, and heterogeneous distributed databases in particular, are of increasing practical importance, as organizations attempt to integrate databases across physical and organizational boundaries. Such interconnection of databases to create a distributed or multidatabase is in fact proving crucial to competitiveness for many companies. This chapter reconsiders the issues addressed earlier in the text, such as query processing, recovery and concurrency control, from the standpoint of distributed databases.

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  • This manual describes implemention issues for an Oracle8 distributed database system. It also introduces the tools and utilities available to assist you in implementing and maintaining your distributed system. Oracle8 Distributed Database Systems contains information that describes the features and functionality of the Oracle8 and the Oracle8 Enterprise Edition products. Oracle8 and Oracle8 Enterprise Edition have the same basic features. However, several advanced features are available only with the Enterprise Edition, and some of these are optional....

    pdf214p duypha 12-08-2009 140 40   Download

  • Chapter 17 - Client-server processing, parallel database processing, and distributed databases. After this chapter, you should able to: List reasons for client-server processing, parallel database processing, and distributed data; describe two-tier, three-tier, and multiple-tier client-server database architectures; describe common architectures for parallel database processing;...

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  • Chapter 19 - Distributed databases. Chapter 19 covers distributed database systems, revisiting the issues of database design, transaction management, and query evaluation and optimization, in the context of distributed databases. The chapter also covers issues of system availability during failures, heterogeneous distributed databases, cloud-based databases, and distributed directory systems.

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  • © Springer Science+Business Media, LLC 2011 All rights reserved. This work may not be translated or copied in whole or in part without the written permission of the publisher (Springer Science+Business Media, LLC, 233 Spring Street, New York, NY 10013, USA), except for brief excerpts in connection with reviews or scholarly analysis. Use in connection with any form of...

    pdf866p codonqua1991 19-10-2012 32 5   Download

  • This chapter includes content: Distributed databases & client-server architectures, spatial and temporal database, multimedia databases, geographic information systems, XML, data warehousing, outsourcing database services, big data. Inviting you to refer lecture for more information.

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  • This book will help you in your endeavor to upgrade your Oracle OCP DBA certification to the latest level—Oracle Database 11g. It is a study guide for Oracle Database administrators who plan to take the OCP Oracle Database 10g: New Features for.The Oracle Database Application Developers Guide - Fundamentals describes basic application development features of Oracle Database 10g. Information in this guide applies to features that work the same on all supported platforms, and does not...

    pdf312p nghianguyenluong 13-04-2009 581 313   Download

  • This document contains proprietary information and is protected by copyright and other intellectual property laws. You may copy and print this document solely for your own use in an Oracle training course. The document may not be modified or altered in any way. Except where your use constitutes "fair use" under copyright law, you may not use, share, download, upload, copy, print, display, perform, reproduce, publish, license, post, transmit, or distribute this document in whole or in part without the express authorization of Oracle.......

    pdf284p nghianguyenluong 13-04-2009 775 278   Download

  • Oracle Database Application Developer’s Guide - Expression Filter provides usage and reference information about Expression Filter, a feature of Oracle Database that stores, indexes, and evaluates conditional expressions in relational tables. Application developers and DBAs can save time and labor by using Oracle Expression Filter to store and evaluate large sets of conditional expressions in the database.

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  • The information in this book is distributed on an “as is” basis, without warranty. Although every precaution has been taken in the preparation of this work, neither the author(s) nor Apress shall have any liability to any person or entity with respect to any loss or damage caused or alleged to be caused directly or indirectly by the information contained in this work.

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  • his book is a comprehensive and easy-to-understand guide for using the Oracle Data Provider (ODP) version 11g on the .NET Framework. It also outlines the core GoF (Gang of Four) design patterns and coding techniques employed to build and deploy high-impact mission-critical applications using advanced Oracle database features through the ODP.NET provider. The book details the features of the ODP.NET provider in two main sections: “Basic,” covering the basics and mechanisms for data access via ODP.

    pdf473p hoa_can 29-01-2013 34 9   Download

  • One of several current trends in distributed database system de- sign is a move away from supporting traditional ACID database transactions. Some systems, such as Amazon’s Dynamo [13],Mon- goDB [24], CouchDB [6], and Cassandra [17] provide no transac- tional support whatsoever. Others provide only limited transaction- ality, such as single-row transactional updates (e.g. Bigtable [11]) or transactions whose accesses are limited to small subsets of a database (e.g. Azure [9], Megastore [7], and the Oracle NoSQL Database [26]).

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  • This is all possible because the TKFORMAT subsystem is installed inside the DBMS. In fact, TKFORMAT supports more than just SAS formats that are defined using PROC FORMAT. SAS ships with hundreds of formats already defined. Formats supplied by SAS are deployed into the DBMS as a small set of runtime modules. Formats created by PROC FORMAT, in contrast, can export these user-written format definitions as XML. These XML streams can then be stored inside the DBMS as database objects.

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  • Several efforts have been made since 1990 to overcome the effort required to maintain curated protein family data- bases by automatically clustering the protein sequence databases using sequence similarity. The general approach is to compute all possible pairwise comparisons, and then cluster them in some fashion, shifting the effort from humans to computers. This otherwise computationally very demanding process has benefited from the introduc- tion of the rapid PSI-BLAST system(Altschul et al., 1997).

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  • After completing this lesson, you should be able to do the following: List the advantages of distributing different Oracle file types Diagnose tablespace usage problems List reasons for partitioning data in tablespaces Describe how checkpoints work Monitor and tune checkpoints Monitor and tune redo logs

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  • The overall cost of answering a query includes the transfer cost from the storage provider or data origin to the query evaluator, the cost of resources utilized at the query evaluator and other nodes, and the cost to transfer the results to the query initiator. The data placement problem is to distribute data and work so the full query workload is answered with lowest cost under the existing resource and bandwidth constraints.

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  • These features are enabled by the fact that Spanner as- signs globally-meaningful commit timestamps to trans- actions, even though transactions may be distributed. The timestamps reflect serialization order. In addition, the serialization order satisfies external consistency (or equivalently, linearizability [20]): if a transaction T1 commits before another transaction T2 starts, then T1’s commit timestamp is smaller than T2’s. Spanner is the first system to provide such guarantees at global scale.

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  • Our technique determines per-application resource quo- tas in the database and storage caches, on the fly, in a transparent manner, with minimal changes to the DBMS, and no changes to existing interfaces between compo- nents. Towards this objective, we use an online perfor- mance estimation algorithm to dynamically determine the mapping between any given resource configuration setting and the corresponding application latency.

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