distributed database management system architecture ppt

... [AQM+96] Building a database system that accommodates semi-structured data has required us to rethink nearly every as-pect of database management While the overall architec-ture of the system is relatively ... headache in traditional database systems Because of these limitations, many applications involving semistructured data[Abi97] are forgoing the use of a data-base management system, despite the fact ... features, described in [AQM+96], are beyond the scope of this paper 3 System Architecture The basic architecture of the Lore system is depicted in Fig-ure 2 This section gives a brief introduction

Ngày tải lên: 23/03/2014, 12:20

... the database development life cycle Relational Database Design 1A.2 INTRODUCTION TO DATABASE MANAGEMENT SYSTEM Introduction to Relational Database Management System Introduction to Database Management ... Design 1A.6 WHY USE A DATABASE MANAGEMENT SYSTEM? Introduction to Relational Database Management System Why use a Database Management System? ã ã âNIIT The conventional approach to database processing ... Relational Database Design 1A.14 FUNCTIONAL COMPONENTS OF A DATABASE MANAGEMENT SYSTEM Introduction to Relational Database Management System Functional Components of a Database Management System

Ngày tải lên: 01/08/2014, 09:22

... 3MỤC TIÊU  Trình bày cái nhìn bao quát về cơ sở dữ liệu (Database) cũng như về hệ quản trị cơ sở dữ liệu (DBMS), hệ Cơ sở dữ liệu (Database System).  Các yêu cầu khi xây dựng một DBMS.  Một số ... 453453453 07/31/1972 333445555 5 Chương 1 : Nhập môn Hệ Quản Trị CSDL Trang 11DBMS (Database Management System)  Một phần mềm hệ thống cho phép định nghĩa, xây dựng xử lý và bảo trì dữ liệu ... hoạt động Tên, địa chỉ, số điện thoại của khách hàng  Báo cáo doanh thu Trang 9Database (tt)  Cơ sở dữ liệu (Database)  Một tập hợp có cấu trúc của những dữ liệu có liên quan với nhau được

Ngày tải lên: 17/10/2014, 07:23

... in maintaining and utilizing a database Trang 8Database Management System Capabilities of database management system Trang 9Data dictionary  Data dictionary or “system catalog” ◦ A centralized ... bookstore  Library management  … Trang 6Database Simplified database view Trang 7Database Management System  DBMS ◦ A general purpose software package designed to store and manage database  DBMS ...  Overview of DBMS  An Example  Characteristics of the Database  Advantages of using the DBMS approach Trang 15Database Management System  Objectives of DBMS: ◦ Data availability: users can

Ngày tải lên: 15/05/2017, 11:13

... Trang 1Distributed database  Management Systems Lecture 03 Trang 2Resembling SetupsTrang 3Distributed Files: A collection of files  stored on different computers of a  ... Computer System CPU Memory Computer System Shared Secondary Memory Shared Everything Loose Coupling Trang 6CPU Memory Computer System CPU Memory Computer System CPU Memory Computer System Switch ... 4Multiprocessor System: multiple   processors that share some form of  Unit Processor Unit Processor Unit Memory I/O System Shared Everything Tight Coupling Trang 5CPU Memory Computer System CPU Memory

Ngày tải lên: 05/07/2022, 13:30

... Distributed Database  Management System  Lecture 04 Virtual University of Pakistan Fragmentation  Transparency Virtual University of Pakistan ... Database Design Query Processing Concurrency Control Virtual University of Pakistan 11 OS Support Heterogeneity  Relationship among  them  Virtual University of Pakistan 12 Directory Management ... Virtual University of Pakistan 12 Directory Management Query Processing Distributed DB Design Reliability Concurrency Control Deadlock Management Virtual University of Pakistan 13 Thanks Virtual University of Pakistan

Ngày tải lên: 05/07/2022, 13:30

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

Ngày tải lên: 05/07/2022, 13:31

... Trang 1Distributed Database Management Systems Lecture # 8 Trang 2In the previous lecture• Integrity Rules • Data Manipulation ... Coupled–Programming Language and database languages are merged • Loosely Coupled –PL is extended with special concepts Trang 17Computer NetworksTrang 18A computer network is a system for communication

Ngày tải lên: 05/07/2022, 13:32

... three layers form Comm subnet TCP/IP Architecture • Another popular Architecture • Five layers • IEEE Committee 802 Distributed DBMS Architecture Architecture of a systems defines its structure Sheth, ... A., ‘ Federated Database Systems for Managing Distributed Heterogeneous, and Autonomous Databases’, ACM Computing Surveys, 22, No 3, p(183-236), Sep., 90 • Three major (idealized) architectures ... Distributed Database Management Systems Lecture 09 In the previous lecture • Derived Relational Algebra Ops… • Relational

Ngày tải lên: 05/07/2022, 13:32

... Trang 1Distributed Database Management System Lecture 10 Trang 2 Virtual University of Pakistan 2• The functions in ANSI/SPARC Architecture • Square boxes represent ... Pakistan 3Dimensions for DDBS Architecture • Autonomy • Distribution • Heterogeneity Trang 4 Virtual University of Pakistan 4 Heterogeneity: Different component databases has a common thing ... federation Trang 8 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

Ngày tải lên: 05/07/2022, 13:32

... Trang 12A Multidatabase Systemautonomous heterogeneous, and distributed databases Two Major architectures: • Global Schema Architecture • Federated Schema Architecture Major DDBS Architectures-III ... Trang 1Distributed Database Management System Lecture 10 Trang 2Major DDBS ArchitecturesTrang 3Client-Server Architecture• Basic idea is to distribute functionality • Gives two level 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

Ngày tải lên: 05/07/2022, 13:33

... Distributed Database Management Systems Lecture 12 Global Schema Architecture  G External Schema  G External Schema Global Schema ... Global Schema Architecture Virtual University of Pakistan Local Schema Local Schema • • • Federated Database Architecture Global Data Dictionary Virtual University of Pakistan • A directory is a database ... where as in logically integrated DDBS it is top-down Virtual University of Pakistan Multidatabase Systems: Architectures  External Schema  External Schema  External Schema  External Schema Federated

Ngày tải lên: 05/07/2022, 13:33

... Distributed Database Management Systems Lecture 13 How Interests of the local and head offices mar result following ... eSal) Virtual University of Pakistan CLIENT (cAC#, cName, cAdr, cBal) table is placed in different databases based on their location, like from Lahore, Pindi, Karachi, Peshawar, Quetta Virtual University ... Fragmentation(PHF) Virtual University of Pakistan 14 Information Requirements Virtual University of Pakistan 15 Database 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

... Distributed Database Management Systems Lecture 20 In the Previous Lecture • Continued with VF –Computed CA –Partitioning ... FR • Disjointness: TID's are not considered to be overlapping since they are maintained by the system • PK is exception Hybrid Fragmentation It is a complex problem to be solved mathematically,

Ngày tải lên: 05/07/2022, 13:37

... Distributed Database Management Systems Lecture # 21 In the previous lectures Fragmentation: One of the possible ... Replication Storing a separate copy of database at each of two or three or more sites • Advantages of Replication –Reliability –Fast response –May avoid complicated distributed transaction integrity

Ngày tải lên: 05/07/2022, 13:37

... Trang 1Distributed Database Management Systems Trang 2Lecture # 22Trang 3• What different types of Replication• What are ... process, follow the sequence, it’s a must the experiment on a single machine, though it won’t be a distributed environment, but it will be very simple Trang 7• Install multiple instances of SQL Server

Ngày tải lên: 05/07/2022, 13:38

... Trang 1Distributed Database Management Systems Lecture 24 Trang 2Distributed Database Management Systems Virtual University of Pakistan Trang 3FragmentationTrang ... Enterprise Manager we can see two instances of SS • At each of the three sites we define one database named BANK and also one relation, normal base table, however, for the fragmentations to ... {pesh, qta) Trang 10• To ensure the disjointness and also to ensure the proper functioning of the system, we apply a check on the tables • The check is • Peshawar customers are allocated from

Ngày tải lên: 05/07/2022, 13:38

... Distributed Database Management Systems Lecture 25 Distributed Database Management Systems Virtual University of Pakistan In Previous Lectures: ... creates a snapshot, you can verify this from snapshot agent history, or you can go to subscriber database and have a look, like this • We delete a record from our publication and we see that it ... execute the snapshot agent of this replication It will create the snapshot, then you subscribe a database We find the original data in the subscriber After this if we make any change on either

Ngày tải lên: 05/07/2022, 13:38

... Trang 1Distributed Database Management Systems Lecture 26 Trang 2In this Lecture• Transaction Management –Basics –Properties of Transaction Trang 3• Database consistency• A transaction ... Execution of Transaction T End of Transaction T Trang 5 Transaction Management is difficult in case of the concurrent access to the database by multiple users. Trang 7 A transaction is considered ... UPDATE J SET BUDGET = BUDGET * 1.1 WHERE JNAME = “CAD/CAM" end Trang 9Example Database Airline Reservation System– FLIGHT(fNo, fDate, fSrc, fDest, stSold, fCap) – CUST(cName, cAddr, cBal)

Ngày tải lên: 05/07/2022, 13:39