heterogeneous distributed database systems ppt

... Categories and Subject Descriptors C.2.4 [Distributed Systems]: Distributed databases; H.2.4 [Database Management]: Systems—concurrency, distributed databases, transaction processing General ... 9 2 DETERMINISTIC DATABASE SYSTEMS In traditional (System R*-style) distributed database systems, the primary reason that an agreement protocol is needed when commit-ting a distributed transaction ... INTRODUCTION 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

Ngày tải lên: 07/03/2014, 14:20

... Trang 1Query Processing in RDF/S-based P2PDatabase Systems George Kokkinidis, Lefteris Sidirourgos and Vassilis Christophides Institute of Computer ... actually used by groups of peers in order to deploy hybrid (i.e.,super-peer) and structured P2P database systems Finally, Section 4 discusses related work and Section 5 summarizes ourcontributions ... data hosted by peers To this end, we es-sentially need to adapt the P2P computing paradigm to a distributed datamanagement setting More precisely, we would like to support loosely coupledcommunities

Ngày tải lên: 19/02/2014, 12:20

... repre-sentative pieces of work from a broad scope of research in databases, operating systems, and computer architecture Parallel database systems [DG92][CHM95] exploit the inherent parallelism in a ... efforts In the past three decades of database research, several new software designs have been proposed One of the ear-liest prototype relational database systems, INGRES [SW+76], actually consisted ... database software helped cultivate the view that “the database is the center of the world.” Additional front/back-ends or mediators [Wie92] add to the communication and CPU overhead Several database

Ngày tải lên: 07/03/2014, 14:20

... best on the most commonapplication for database systems: business transactional data processing However, there are a set of emergingapplications for database systems for which the row-by-row layout ... explained further in Section 3.2) The vast majority of commercial database systems, including the three most popular database software systems(Oracle, IBM DB2, and Microsoft SQL Server), choose the ... that these databases havehistorically focused on the larger transactional database market and wish to maintain a single line of code for all oftheir database software [64] Similarly, database research

Ngày tải lên: 23/03/2014, 16:20

... Trang 1EVALUATIƠN OF CPM - A COMMIT PROTOCOL FO K M O B I L E D I S T R I B Ư T E D DATABASE S Y S T E M S Le H u u L a p pnsts T e le co m m u n ica tio n s In s titu te ()f Technology ... Averagt* w ireless tra n s m is s io n de lay lOms Àvi»ratft‘ vviređ tra n s m is s ío n đelay 5ms Database system degrue o f d is trib u tio n >= 10 sites T h o s im u la tio n s o ftw a re is

Ngày tải lên: 11/12/2017, 11:42

... Trang 1EVALUATIƠN OF CPM - A COMMIT PROTOCOL FO K M O B I L E D I S T R I B Ư T E D DATABASE S Y S T E M S Le H u u L a p pnsts T e le co m m u n ica tio n s In s titu te ()f Technology ... Averagt* w ireless tra n s m is s io n de lay lOms Àvi»ratft‘ vviređ tra n s m is s ío n đelay 5ms Database system degrue o f d is trib u tio n >= 10 sites T h o s im u la tio n s o ftw a re is

Ngày tải lên: 18/03/2021, 10:33

... Multidatabase Systems Nonfederated Database Systems e.g., UNIBASE Federated Database Systems /\ [Dwyer and Larson 19871 [Templeton et al 1987a] Figure 3 Taxonomy of multidatabase systems autonomy ... [Information Systems]: General; H.2.0 [Database Management]: General; H.2.1 [Database Management]: Logical Design data models, schema and subs&ma; H.2.4 [Database Management]: Systems; H.2.5 [Database ... Management]: Heterogeneous Databases; H.2.7 [Database Management]: Database Administration General Terms: Design, Management Additional Key Words and Phrases: Access control, database administrator, database

Ngày tải lên: 20/02/2014, 05:21

... the database that existed when the dump began, but database activity may change many database elements on disk during the minutcs or hours that the dump takes If it is necessary to restore the database ... reconstruct the database from it (i.e., copy the archise into the database) (b) If there are later incremental dumps, modify the database according to each, earliest first 2 Xlodifi the database using ... algorithms for database systems," Proc 1983 IFIP Congress, North Holland, Ams- terdam, pp 799-807 2 P A Bernstein, V Hadzilacos, and N Goodman, Concurrency Control and Recovery in Database Systems,

Ngày tải lên: 21/01/2014, 18:20

... Distributed Databases We shall now consider the elements of distributed database systems In a dis- tributed system, there are many, relatively autonomous processors that may participate in database ... versions," ACM Trans on Database Systems 9:l (1984), pp 89- This chapter also incllldes an introduction t o distributed databases IVe focus on ho1v to lock elements that are distributed among several ... "Locking primitives in a database system," J ACM 30:l (19831, pp 55-79 8 H.-T Kung and J T Robinson, "Optimistic concurrency control,.' ACM Trans on Database Systems 6:2 (1981), pp 312-326

Ngày tải lên: 26/01/2014, 15:20

... Automatic Database Partitioning inShared-Nothing, Parallel OLTP Systems Brown University Yahoo! Research Brown University ABSTRACT The advent of affordable, shared-nothing computing systems por-tends ... approach to automatically partitioning databases for enterprise-class OLTP systems that sig-nificantly extends the state of the art by: (1) minimizing the number distributed transactions, while concurrently ... propagated throughout the application) OLTP systems, especially enterprise OLTP systems that handle high-profile data (e.g., financial and order processing systems), also need to be scalable but cannot

Ngày tải lên: 07/03/2014, 14:20

... Madonna is taking CS564) ❖ A Database Management System (DBMS) is a software package designed to store and manage databases Trang 3Why Use a DBMS?Trang 4Why Study Databases??– at the “low end”: ... Trang 1Introduction to Database SystemsModule 1, Lecture 1 Instructor: Raghu Ramakrishnan raghu@cs.wisc.edu UW-Madison Trang ... with deadlocks etc.) are handled transparently by the DBMS Trang 14Databases make these folks happy – E.g smart webmasters ❖ Database administrator (DBA) – Designs logical /physical schemas –

Ngày tải lên: 30/03/2014, 13:20

... imple-menting database systems and applications Our presentations stresses the fundamentals of database modeling and design, the languages and facilities provided by the database management systems, ... Bibliography 536 CHAPTER 16 Practical Database Design and Tuning 537 16.1 Physical Database Design in Relational Databases 537 16.2 An Overview of Database Tuning in Relational Systems 541 CHAPTER 1 7 Introduction ... the design and imple-mentation of a bookstore's database Appendixes E and F cover legacy database systems,based on the network and hierarchical database models These have been used for overthirty

Ngày tải lên: 07/07/2014, 06:20

... on Computer Systems (journal) TODS: ACM Transactions on Database Systems (journal)TOIS: ACM Transactions on Information Systems (journal)TOOlS: ACM Transactions on Office Information Systems (journal)TSE: ... Expert Database Systems, Charleston, SC, April 1986), Ben-jamin/Cummings,1987 EDS [1988] Expert Database Systems, Kerschberg,L.,ed.(Proceedings of the Second Interna-tional Conference on Expert Database ... Object-Oriented Database Systems: A vey," Proceedings of the 3rd International Workshop Rules in Database Systems (RIDS'97), Skovde, Sweden, June 1997 Sur-Faloutsos,C.[1996] Searching Multimedia Databases

Ngày tải lên: 07/07/2014, 06:20

... current copy of the database In the shadow-copy scheme, a transaction that wants to update the database firstcreates a complete copy of the database All updates are done on the new database copy, leaving ... new copy of the database; the new copy then becomesthe current copy of the database The old copy of the database is then deleted Fig-ure 15.2 depicts the scheme, showing the database state before ... in Sections 21.2.5 and 21.2.6 Some database systems, such as Microsoft SQL Server 7.5, and the RedBrick DataWarehouse from Informix, provide tools to help the database administrator with in-dex

Ngày tải lên: 08/08/2014, 18:22

... 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 ... or optimize them • One Server Multiple Clients • Multiple Servers time Trang 6Peer-to-Peer Distributed SystemsTrang 7LIS1 LIS2 LISnGCS ES1 Trang 8• Physical data organization at each site defining ... Trang 1Distributed Database Management System Lecture 10 Trang 2Major DDBS ArchitecturesTrang 3Client-Server

Ngày tải lên: 05/07/2022, 13:33