heterogeneous 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

... 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 ... multiple systems placed at different locations, since belong to same org no heterogeneity and autonomy Trang 9 Virtual University of Pakistan 9Autonomy, maximum of distribution, and heterogeneous ... University of Pakistan 5Architectural Alternatives SemiAutonomout, Total Isolation) Peer to Peer) Heterogeneous) Trang 6 Virtual University of Pakistan 6Trang 7 Virtual University of Pakistan 7No

Ngày tải lên: 05/07/2022, 13:32

... Physically accesses the data as  per the commands generated  Trang 12A Multidatabase Systemautonomous heterogeneous, and distributed databases Two Major architectures: • Global Schema Architecture • Federated ... 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 ... Trang 1Distributed Database Management System Lecture 10 Trang 2Major DDBS ArchitecturesTrang 3Client-Server Architecture•

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

... Trang 1Distributed Database Management Systems Lecture 15 Trang 2 Virtual University of Pakistan 2PHF- Minimality of Pr ... Virtual University of Pakistan 22• Implications must be based on the database semantics not on a particular extension of the database Trang 23 Virtual University of Pakistan 23Trang 24 Virtual

Ngày tải lên: 05/07/2022, 13:34

... Trang 1Distributed Database Management Systems Trang 2Lecture # 21Trang 3Fragmentation: One of the possible way we can ... Fragmentation is relatively more complex Why ? Trang 7In today’s Lecture Trang 8 Storing a separate copy of database at each of two or three or more sites Trang 9integrity routines (if replicated data is

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 ... The previous two examples represent access of a local user, now if the global users, like from Management, want to access data across all sites, they will pose the query against the global view,

Ngày tải lên: 05/07/2022, 13:38

... Trang 1Distributed Database Management Systems Lecture 25 Trang 2Distributed Database Management Systems Virtual University of Pakistan Trang 3In Previous ... monitor, right click it, then select Push new subscription Trang 45• You select the particular database where you want to subscribe, we have created a new one Trang 47• On next slide is asks ... creates a snapshot, you can verify this from snapshot agent history, or you can go to subscriber database and have a look, like this Trang 51• We delete a record from our publication and we see

Ngày tải lên: 05/07/2022, 13:38

... Missouri Columbia With materials from: Peter Veenstra M.J. Harden Associates Relational Database Management Systems, Database Design, and GIS ... Name: Column Name Key Type Nulls/ Unique Sample Data Good Database Design Prevents ã Unnecessary or forgotten data ã Inflexibility for database re-sizing or modification ã Poor data element specification ã Poor database integration ... sophistication of users ã Schedule and budget of the project ã Management approach • Manipulate, update and expand the database • Administer the database • Provide programming services ã Track new technology...

Ngày tải lên: 17/03/2014, 00:20

... page 5. Database management systems - 2. Using a database for document retrieval - page 1 Information Management Resource Kit Module on Management of Electronic Documents UNIT 5. DATABASE MANAGEMENT ... the allowable metadata slots. Metadata search 5. Database management systems - 2. Using a database for document retrieval - page 7 Using a database for delivery You should consider delivering ... information or application for the Web and CD. Using a database for delivery Choices for CD creation 5. Database management systems - 2. Using a database for document retrieval - page 16 Exercise...

Ngày tải lên: 31/03/2014, 20:20

... servers. 5. Database management systems - 3. Using a database for document management - page 1 Information Management Resource Kit Module on Management of Electronic Documents UNIT 5. DATABASE MANAGEMENT ... choice. Content management Resources administration Semantic management 5. Database management systems - 3. Using a database for document management - page 3 Requirements for document management 1) ... completed the course. 5. Database management systems - 3. Using a database for document management - page 9 Using a database for management If you decide to use a database, you have to know...

Ngày tải lên: 31/03/2014, 20:20

... native XML database (http://sourceforge.net/ ) 5. Database management systems - 4. Textual, relational and xml databases – page 13 XML and databases Relational databases can be used as XML database, ... products. 5. Database management systems - 4. Textual, relational and xml databases – page 5 Relational databases With a relational database these problems are solved. A relational database is a database ... relational database: which choice will better meet our needs? 5. Database management systems - 4. Textual, relational and xml databases – page 1 Information Management Resource Kit Module on Management...

Ngày tải lên: 31/03/2014, 20:20

... 5. Database management systems - 5. Relational databases and SQL basics – page 1 Information Management Resource Kit Module on Management of Electronic Documents UNIT 5. DATABASE MANAGEMENT SYSTEMS LESSON ... a relational database. Good luck! 5. Database management systems - 5. Relational databases and SQL basics – page 4 EER modelling Let’s consider this example. You have created a database for ... answers 5. Database management systems - 5. Relational databases and SQL basics page 15 Summary ã SQL (Structured Query Language) is the language used to interact with a relational database. ã...

Ngày tải lên: 31/03/2014, 20:20