distributed database management systems

... Trang 1Distributed database  Management Systems Lecture 03 Trang 2Resembling SetupsTrang 3Distributed Files: A collection of files  stored on different computers of a  ... A transparent system hides the  implementation details from its  users Trang 14User should not only be free from  network management activities rather  it should be unaware of even  existence of the network Location Transparency and Naming 

Ngày tải lên: 05/07/2022, 13:30

... Trang 1Distributed Database  Management System  Lecture 04 Trang 2Fragmentation  Transparency Trang 3 Transparency is desirable but there  ... 10The Problem AreasTrang 11 Database Design Query Processing  Concurrency Control Trang 12 OS Support Heterogeneity   Relationship among  them  Trang 13Directory Management Distributed DB Design ... Practically, we get combination of all  three. Trang 5DI NwT Lan T R/F T Layers of Transparency Trang 6 Reliability through Distributed Transactions: Avoids simple point of failure  Concurrency Issues: Transaction involving 

Ngày tải lên: 05/07/2022, 13:30

... Trang 1Distributed Database Management System Lecture 05 Trang 2 Virtual University of Pakistan 2Data Model • A set of tools/ constructs used to model a database • Record/Semantic ... University of Pakistan 4Relational Data Model • Two major Strengths • Three Components • Relational databases based on relational Data Model Trang 5 Virtual University of Pakistan 5• A relation R

Ngày tải lên: 05/07/2022, 13:31

... Trang 1Distributed Database Management Systems Lecture # 8 Trang 2In the previous lecture• Integrity Rules • Data Manipulation ... Trang 14Interface with Programming LanguagesTrang 15• Tightly Coupled–Programming Language and database languages are merged • Loosely Coupled –PL is extended with special concepts Trang 17Computer

Ngày tải lên: 05/07/2022, 13:32

... subnet Trang 20Distributed DBMS Architecture Trang 21 Architecture of a systems defines its structure Trang 22 Sheth, A P., Larson, J A., ‘ Federated Database Systems for Managing Distributed Heterogeneous, ... Trang 1Distributed Database Management Systems Lecture 09 Trang 2In the previous lectureAlgebra Ops… Trang 3In this LectureTrang ... Autonomous Databases’, ACM Computing Surveys, 22, No 3, p(183-236), Sep., 90 Trang 23• Three major (idealized) architectures of DDBMS discussed –Peer to peer –Client/Server –Multidatabase Trang

Ngày tải lên: 05/07/2022, 13:32

... Trang 1Distributed Database Management System Lecture 10 Trang 2 Virtual University of Pakistan 2• The functions ... Heterogeneity Trang 4 Virtual University of Pakistan 4 Heterogeneity: Different component databases has a common thing that is represented by different way It must be difficult to handle ... Virtual University of Pakistan 8to peer and homogeneous system same organization, of course multiple systems placed at different locations, since belong to same org no heterogeneity and autonomy Trang

Ngày tải lên: 05/07/2022, 13:32

... Trang 1Distributed Database Management System Lecture 10 Trang 2Major DDBS ArchitecturesTrang 3Client-Server Architecture• ... you can see in the figureManagement; • Query Processing • Transaction and Storage Management • application and user interface • a client module of DBMS • Data and lock management cached their ... Physically accesses the data as  per the commands generated  Trang 12A Multidatabase Systemautonomous heterogeneous, and distributed databases Two Major architectures: • Global Schema Architecture • Federated

Ngày tải lên: 05/07/2022, 13:33

... Trang 1Distributed Database Management Systems Trang 2 L External Schema  G External Schema Global Schema Component Schema ... SchemaExport  External Schema  ExternalSchema Federated Database Architecture Export Schema Trang 5Global Data Dictionary Trang 6• A directory is a database that contains data about data (meta-data) ... different sites • Hierarchies of DD can be built • Location: whether to keep at a single site or distributed • Single site increases load on that site Trang 8• Single copy or replication• Replication

Ngày tải lên: 05/07/2022, 13:33

... Trang 1Distributed Database Management Systems Lecture 13 Trang 2 Virtual University of Pakistan 2How Interests of the ... Virtual University of Pakistan 5CLIENT (cAC#, cName, cAdr, cBal) table is placed in different databases based on their location, like from Lahore, Pindi, Karachi, Peshawar, Quetta Trang 6 Virtual ... Virtual University of Pakistan 15Information Requirements Trang 16 Virtual University of Pakistan 16Database Information: We may need to consult the conceptual DB design RDM being Semantically not

Ngày tải lên: 05/07/2022, 13:33

... Trang 1Distributed Database Management Systems Lecture 14 Trang 2 Minterm predicates: given a set of simple predicates ... University of Pakistan 9• A PHF is defined by a selection operation on the owner relations of the database schema, given a relation R, its PHF are given by Ri = Fi (R), 1 ≤ i ≤ w – Where F j is

Ngày tải lên: 05/07/2022, 13:34

... Introduction to Distributed Databases 22.6.1 Types of Distributed Databases 22.7 Distributed DBMS Architectures 22.7.1 Client-Server Systems 22.7.2 Collaborating Server Systems 22.7.3 Midclleware Systems ... Retrieval and XML Data Management Relational Model SQLDDL Dependencies j j j j j j j j j j j j j j j j j j j j j j j j j j j j j j DATABASE MANAGEMENT SYSTEMS DATABASE MANAGEMENT SYSTEMS Third Edition ... Data Integration 29.3 Mobile Databases 29.4 Main Memory Databases 29.5 Multimedia Databases 29.6 Geographic Information Systems 29.7 Temporal Databases 29.8 Biological Databases 29.9 Information...

Ngày tải lên: 29/03/2014, 12:20

... Documents metadata Database Document Text Documents Document Meta Data Database metadata Document Document Text Documents Database Click on your answer Database management systems - Using a database for ... answers Database management systems - Using a database for document retrieval - page Using a database for delivery Now, you can start to choose the delivery system, that is how information will be distributed ... you need to put in to reach different groups of users Database management systems - Using a database for document retrieval - page Using a database for delivery You should consider delivering...

Ngày tải lên: 31/03/2014, 20:20

... than systems which everything in the database Database management systems - Using a database for document management - page Using a database for management There are advantages to using systems ... when stored in the database, rather than the file system Database Using a database for management Databases are used in document management systems and in web content management systems The choice ... control loops Database management systems - Using a database for document management - page Requirements for document management Content management is the other area of document management This...

Ngày tải lên: 31/03/2014, 20:20

... by the two main types of databases: textual and relational Database management systems - Textual, relational and xml databases – page Flat file databases The flat file database can be considered ... products Database management systems - Textual, relational and xml databases – page 12 XML and databases Recently there has been much technical work on the linkage of XML and databases Relational databases ... following types of database can meet your needs? A relational database A textual database Please click on the answer of your choice Database management systems - Textual, relational and xml databases...

Ngày tải lên: 31/03/2014, 20:20

... Date An Introduction to Database Systems Addison Wesley; ISBN: 0201787229 The definitive book on database systems C.J Date, Hugh Darwen Foundation for Future Database Systems: The Third Manifesto ... users may or may not with the objects in the database To this we need to use the Structured Query Language (SQL) Database management systems - Relational databases and SQL basics – page From relations ... relational database SQL is more than simply a query language; it is a database sub-language and is becoming the standard interface to relational and non-relational database management systems (DBMS)...

Ngày tải lên: 31/03/2014, 20:20

... of tools for relational database management A textual database A set of tools for textual database management Click on your answer Database management systems - Textual databases and cds/isis ... Set of Information Systems) , is a textual database management system designed to build and manage textual databases Database management systems - Textual databases and cds/isis basics – page What ... the work required, let’s design a CDS/ISIS database Database management systems - Textual databases and cds/isis basics – page Designing a CDS/ISIS database Developers have to create a series...

Ngày tải lên: 31/03/2014, 20:20

... Tolerance in Highly Available Database Management Systems by Mark Paul Sullivan Abstract Today, software errors are the leading cause of outages in fault tolerant systems System availability can ... main memory resident databases Extensible DBMSs include extended relational systems [70], object-oriented systems [6], and DBMS toolkits [14] An extensible DBMS lets users or database administrators ... Most database management systems rely on temporal redundancy to recover from software errors Most of recovery techniques surveyed in Haerder and Reuter [34] restore CHAPTER INTRODUCTION 10 the database...

Ngày tải lên: 28/04/2014, 13:32

... Introduction to Distributed Databases 21.5.1 Types of Distributed Databases Distributed DBMS Architectures 21.6.1 Client-Server Systems 21.6.2 Collaborating Server Systems 21.6.3 Middleware Systems Storing ... and distributed database management, Internet databases, data warehousing and complex Introduction to Database Systems queries for decision support, data mining, object databases, spatial data management, ... several commercial systems based on this model [634] contains a good annotated collection of systems- oriented papers on database management Other texts covering database management systems include...

Ngày tải lên: 23/06/2014, 20:10

... Client-server execution and remote database access: These commands control how a client application program can connect to an SQL database server, or access data from a database over a network This ... (DELETE, UPDATE) of relations (Section 3.1) Integrity constraints are conditions on a database schema that every legal database instance has to satisfy Besides domain constraints, other important types ... constraints, explain why Exercise 3.15 Consider the Notown database from Exercise 2.5 You have decided to recommend that Notown use a relational database system to store company data Show the SQL statements...

Ngày tải lên: 08/08/2014, 18:22