heterogeneous distributed database systems for production use

... mas in an FDBS, one for each class of federation users. A class of federation users is a group of users and/or applications per- forming a related set of activities. For ex- ample, in a ... iconic symbols used for each of these basic components. The reasons for choosing these components are as follows: l Most centralized, distributed, and feder- ated database systems can be ... schema architecture, database de- sign, query processing and optimization, transaction management, and distributed database management. Characteristics of Database Systems Systems consisting...

Ngày tải lên: 20/02/2014, 05:21

... Versions 1-7 Distributed Databases and Distributed Processing 1-7 Distributed Databases and Database Replication 1-7 Heterogeneous Distributed Databases 1-8 Heterogeneous Services 1-8 Heterogeneous ... management systems such as: Oracle’s Distributed Database Architecture 1-2 Oracle8 Distributed Database Systems Oracle’s Distributed Database Architecture A distributed database is a set of databases ... connected user at the local database. Oracle’s Distributed Database Architecture 1-4 Oracle8 Distributed Database Systems The Network To link the individual databases of a distributed database...

Ngày tải lên: 17/01/2014, 09:20

... Versions 1-7 Distributed Databases and Distributed Processing 1-7 Distributed Databases and Database Replication 1-7 Heterogeneous Distributed Databases 1-8 Heterogeneous Services 1-8 Heterogeneous ... < operator > y [AND ] Oracle’s Distributed Database Architecture 1-2 Oracle8 Distributed Database Systems Oracle’s Distributed Database Architecture A distributed database is a set of databases stored on ... repositories of information about each database in the system to ease the configuration of distributed database access. Databases and Database Links Each database in a distributed database is distinct...

Ngày tải lên: 07/03/2014, 23:20

... Descriptors C.2.4 [Distributed Systems] : Distributed databases; H.2.4 [Database Management]: Systems concurrency, distributed databases, transaction processing General Terms Algorithms, Design, Performance, ... often used by distributed database systems for heartbeats, configuration syn- 1.1 The cost of distributed transactions Distributed transactions have historically been implemented by the database community ... Section 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...

Ngày tải lên: 07/03/2014, 14:20

... ask the user for information to solve the problem, the user is given the opportunity to provide additional relevant information. Even if this information is not strictly necessary for the ... inferring what the user's goal is as well as the criteria which the user has for how the goal is to be satisfied. Furthermore, the user has the responsibility for determining what information ... the database system. We are currently working on natural language for expert systems at Columbia and thus, expert systems provide a natural alternative environment to compare against the database...

Ngày tải lên: 21/02/2014, 20:20

Ngày tải lên: 27/02/2014, 07:20

... mod- ern database systems (a) use a work-centric multi- threaded (or multi-process) execution model for parallel- ism, and (b) employ a multitude of sophisticated tools for server performance ... straightforward changes that transformed the base code into a series of procedure calls and are not further discussed here), (2) adding support for stage- F IGURE 4: A production- line model for staged ... Pub., San Mateo, CA (1991). [DG92] D. DeWitt and J. Gray. “Parallel Database Systems: The Future of High Performance Database Systems. ” In Communi- cations of the ACM, Vol. 35, No. 6, June 1992. [GL01]...

Ngày tải lên: 07/03/2014, 14:20

... also used in the Mariposa system [45]. The second row from the top focuses on the heteroge- neous nature of federated databases, without considering any dynamic runtime issues. Heterogeneous database ... the full paper [12] for the proofs Decoupled Query Optimization for Federated Database Systems Amol Deshpande Joseph M. Hellerstein Computer Science Division University of California, Berkeley amol, ... optimization work goes back as far as the early distributed database systems (R*, SDD-1, Distributed In- gres [22, 14, 7]), and most recently has been focused on linking data sources of various capabilities...

Ngày tải lên: 07/03/2014, 14:20

Ngày tải lên: 16/03/2014, 19:20

Ngày tải lên: 23/03/2014, 12:20

Ngày tải lên: 30/03/2014, 13:20

Ngày tải lên: 30/03/2014, 13:20

Ngày tải lên: 05/05/2014, 08:42

Ngày tải lên: 21/06/2014, 23:20

Ngày tải lên: 22/06/2014, 13:20

Ngày tải lên: 22/06/2014, 22:20

Ngày tải lên: 22/06/2014, 23:20

... a distributed database system? a) Even if the site where a table is stored has been changed due to an operational problem or for the purpose of improving the performance, the user can use ... U.S. and the ITSEC used for procurement by European governments? a) Criteria for assessing security related to information technology b) A standard for basic technology on information security ... being aware of this. b) Even if the database is physically distributed via a communication network, the system can be used without making the user aware of the distributed configuration. c) Even...

Ngày tải lên: 24/08/2012, 15:44

... Backup/Restore feature (i) Database backup and restoration can be done for the entire database or for individual tables. (ii) “Entire database backup” saves the entire database on backup media. ... key, a solid underline is used for the column name or group of column names that make up the primary key. (3) When representing a foreign key, a dotted underline is used for the column name or ... solid underline is used for the attribute name or group of attribute names that make up the primary key. (8) When representing a foreign key, a dotted underline is used for the attribute name...

Ngày tải lên: 24/08/2012, 15:44

... tool for the information system Company W decided to use a multi-dimensional analysis tool for the information system. The specifications of the tool are as follows. (1) A relational database ... system Sales performance Masters Masters, sales performance, etc. Operations database Information system Analytical database - 5 - (Shipment scheduling) ã Order information is organized ... key, a solid underline is used for the column name or group of column names that make up the primary key. (3) When representing a foreign key, a dotted underline is used for the column name or...

Ngày tải lên: 24/08/2012, 15:44