
	Where results make sense

Topic: Federated database system

Related Topics

Irish Reunification

Pharmacopeia

Bozlak

Columbia College (Columbia, South Carolina)

Kenneth Schermerhorn

Homer Stille Cummings

Peacock (star)

In the News (Sun 3 Jun 12)

EXECUTIVE POWER

Iran

ANALYSIS

Pakistan

Family compact

	Federated database system - Wikipedia, the free encyclopedia
		Since the constituent database systems remain autonomous, a federated database system is a contrastable alternative to the (sometimes daunting) task of merging together several disparate databases.
		A federated database (or virtual database) is the fully-integrated, logical composite of all constituent databases in a federated database system.
		To this end, a federated database system must be able to deconstruct the query into subqueries for submission to the relevant constituent DBMS's, after which the system must composite the result sets of the subqueries.
	en.wikipedia.org /wiki/Federated_database_system (397 words)

	Winter Corporation Articles - Archive
		A federated database is a collection of data stored on multiple autonomous computing systems connected by a network that is presented to users as one integrated database.
		The federated database system processes queries defined in terms of these views, retrieving data as needed from the other systems in the federation, and delivering the results as if all the data was local.
		Federated databases operate by means of a similar principle, except that each data resource is defined by means of a database schema or view, and the user has much more power to access and manipulate the data.
	www.wintercorp.com /rwintercolumns/PlayingEveryTune.html (1843 words)

	Introduction To Heterogeneous Databases
		The heterogeneities that are due to differences of the various database management systems that are invoked in a heterogeneous database, and the heterogeneities that are due to differences in the semantics of the data.
		The data management systems are often database management systems or merely file-based systems differing in several aspects such as data model, query language, system architecture, etc. as well as the structure and semantics of the data managed.
		In designing a federated database, we should take into account the transformation of heterogeneous local schemas from the native data models of the component database systems into a common data model, the integration of these homogenized schemas into the federated schema, and the derivation of external schemas for global applications.
	www.deas.harvard.edu /courses/cs265/1996/proj/heter/Heter.htm (6409 words)

	Data integration through database federation
		Database federation is one approach to data integration in which middleware, consisting of a relational database management system, provides uniform access to a number of heterogeneous data sources.
		Database federation (or mediation as it is sometimes referred to in the literature) provides users with a virtual data warehouse, without necessarily moving any of the data.
		Of course, database federation is not a panacea.
	www.research.ibm.com /journal/sj/414/haas.html (8998 words)

	Administration Guide (Site not responding. Last check: 2007-10-16)
		A federated database system or federated system is a database management system (DBMS) that supports applications and users submitting SQL statements referencing two or more DBMSs or databases in a single statement.
		DB2 federated database catalog entries contain information about data source objects: what they are called, what information they contain, and conditions under which they can be used.
		After a federated system is set up, the information in data sources can be accessed as though it were in one large database.
	www.seas.ucla.edu /db2/db2d0/db2d017.htm (723 words)

	Data Exchange System
		The target of our system is to update the object-oriented database according to the changes (writes, updates, deletes) which are applied to the data of the relational database, so as the two databases would have the same information in their common parts.
		This system is a Federated Database system (FDBMS) and in particular it is a tightly-coupled federated database system.
		This system is between the two databases and it sends all the changes that are done to one database, to the other one, in a synchronous or an asynchronous way, without influencing any of the applications of the two databases.
	www.deas.harvard.edu /courses/cs265/1996/proj/heter/Fproj.htm (2240 words)

	A framework for query processing in a federated database system: a case study
		An implementation of an integrated database schema using a common data model and distributed query processing capabilities using a common data manipulation language are the key factors in a successful implementation of a FDBS.
		The integrated database schema hides the complexity and distribution of the underlying databases, greatly simplifies the task of building a query and promotes a correct and common understanding of the data.
		The implementation of a system capable of operating in a federated database environment is a complex task.
	libraries.maine.edu /Spatial/gisweb/spatdb/urisa/ur94016.html (2596 words)

	Hammer, J.; McLeod, D.: On the Resolution of Representational Diversity in Multidatabase Systems
		A collection of cooperating but heterogeneous, autonomous component database systems may be termed a multidatabase system (MDBS) [LMR90], or loosely-coupled federated database system [SL90].
		Such cooperating systems attempt to support operations for partial and controlled sharing of data with minimal affect on existing applications.
		By resolving representational differences we mean two thin(1) determine as precisely as possible the relationships between sharable objects in different components, and (2) detect possible conflicts in their structural representations that pose problems when folding the non-local data into the local schema later on.
	dbpubs.stanford.edu:8090 /pub/1995-11 (458 words)

	What are federated databases?: Narayana Vyas Kondreddi's home page
		A federation is a group of SQL Servers that cooperate to share the processing load of a system.
		Federated database servers let you scale out a set of servers to support the processing needs of large systems and websites.
		Scaling out is the process of increasing the processing power of a system by adding one or more additional computers, or nodes, instead of beefing up the hardware of a single computer (Scaling up).
	vyaskn.tripod.com /what_are_federated_databases.htm (683 words)

	WhamTech - The advantages and disadvantages of federated database systems
		Federated database systems were pursued in an attempt to overcome some of the disadvantages of data warehouses by providing the following primary benefit:
		However, there are considerable disadvantages of federated database systems that generally counter data warehouse benefits due to data source constraints:
		To accommodate the translation between an application or information sharing system and any particular data source, conventional adapters are developed, typically, over a significant period and at great cost to cover basic requirements.
	www.whamtech.com /adv_disadv_fds.htm (220 words)

	Development of an Integrated Information Model for Computer Integrated Manufacturing
		Actually all applications can be treated somehow as databases, however, the data may not be accessed and maintained as easy as with a traditional database system.
		Although the federated schema is not located on one particular (centralized) machine, it is still possible to visualize the federated schema by querying all connected applications for their export schemes.
		There are two basic methods to achieve data consistency when processing and transporting data in an integrated system [4]: a pull system that requires the receiver to ask the sender for data, or a push system, in which the sender initiates the transfer.
	www.ent.ohiou.edu /~dkoonce/papers/cie2.html (1259 words)

	Project description
		A federated system of factual database is a collection of individual databases located in geographical different computer systems.
		The integrated factual databases will be designed around a system of federated/distributed databases with standard query procedures and a user-interface which also allows for low technology access of especially users in the developing world.
		Together with the other services developed by ISN and the services of further partners, the federated fact database system is planned to become one of the elements of a comprehensive information system in the field of International Relations and Security.
	www.sipri.se /projects/database/description_new.html (1099 words)

	Administration Guide
		Configuring a federated database to use the same collating sequence that a data source uses and then setting the collating_sequence server option to 'Y' allows the optimizer to consider "pushing-down" character range comparison predicates.
		If the federated database's collating sequence is the same as that of the data source where the queried data is stored, the sort may take place at the data source.
		If the collating sequences at the federated database and the data source differ, and you need to see the data ordered in the data source's sequence, you can submit your query in pass-through mode, or define the query in a data source view.
	www.nvc.cs.vt.edu /pkgdocs/IBMdb2/html/db2d0/db2d0173.htm (4529 words)

	Using flows in information integration
		When a database system is coupled with a flow engine, all of these capabilities are made available to database applications.
		This reduces the number of interactions between the application and the database system to one, avoiding the exchange, and the possibility of wire tapping, of intermediate data between the functions of the script.
		When the database system or the application itself detects an error and has to abort, the database system may request the flow engine to undo the involved spheres; the detailed discussion of the underlying mechanics is outside the scope of this paper.
	www.research.ibm.com /journal/sj/414/leymann.html (4280 words)

	[No title]
		89 KB Introduction Myriad is a federated database system (FDBS) prototype being developed at the University of Minnesota.
		A federation consists of an integrated database whose schema is represented as a set of integrated relations derived from the export relations provided by the component DBMSs.
		To demonstrate the essential features of database integration in Myriad, we constructed several example databases on both Oracle and Postgres such that relations from these databases are merged into integrated relations using relational operations as well as user-defined integration functions.
	www.cs.wisc.edu /niagara/data/SigRecord/data/01450.xml (449 words)

	Database Research Exercise
		The ability to offer technologies to our consumers that will enable them to query federated databases efficiently and to effectively data mine information sources will be a significant factor in customers choosing our technology other technologies provided.
		However, they are unlikely to move all the data to a new, centralised system, or in fact, to any new system that disrupts their existing applications or threatens the autonomy of the various departments." http://www.almaden.ibm.com/cs/garlic/
		The research area that I would propose is development of a database integration environment with scalability to enable it to be implemented in a small organisation tying together various information sources, to being able to be used by a large company for web based data mining.
	www.benmeadowcroft.com /reports/database (1202 words)

	A Federated Multimedia Database System (Site not responding. Last check: 2007-10-16)
		Instead of a complex database system that manage all kind of data, we propose a federation of existing systems i.e.
		traditional database systems for structured data and media data stores together with a federated management system that manages an expressive, global schema for all these data.
		We think that this is the natural way to build multimedia database systems, because the special characteristics and requirements of media data e.g.
	www.sciences.univ-nantes.fr /info/perso/permanents/martinez/Researches/EDBT99/StudentWorks/HBerthold.html (418 words)

	Database Management Systems for 2000
		Most existing query optimizers for federated/distributed database systems perform query optimization statically and assume that the cost models for the underlying systems are known.
		Database Management Systems are complex, heavyweight pieces of software that are highly optimized for specific workloads and are used mainly in mission-critical applications that require high levels of consistency, recovery, and scalability.
		The BUDS (Berkeley Universal Data Storage) system is a high performance, scalable storage manager that exports a flexible and extensible API.
	db.cs.berkeley.edu /papers/ERL/erl00.html (1136 words)

	Federated Database Management System Research Group (Site not responding. Last check: 2007-10-16)
		This integrated access, that is, an access as if they were a single database, requires interconnecting the database systems by communication network and overlapping a software layer upon the DBMSs to support their communication, sharing their data but preserving their autonomy at the local application level.
		The collection of cooperating DBMS (also known as Component Databases (CDBs)) forms a Database Federation (DBF) and the Federated Database Management System (FDBMS) is the software that manages the DBF.
		Inclusion of the Data Warehouse in a federated architecture.
	dino.ugr.es /~bdf/home_eng.html (170 words)

	CRN \| IBM: Xperanto Rollout To Start
		IBM has begun testing its next-generation Xperanto database management system, which the company plans to begin rolling out in phases in the first half of this year.
		Microsoft and Oracle are pursuing a database strategy that reflects their application strategies, which require a centralized database for integration, said Mattos.
		Analysts said a true federated approach is important as companies struggle to tie legacy databases into a Web-based strategy.
	www.crn.com /sections/BreakingNews/breakingnews.asp?ArticleID=39187 (754 words)

	Please advize on how to implement a federated database system.
		I thought of going for federated database system but I don't know how to implement it.
		Uncontrolled redundant data - people may be creating new databases when existing databases may have all the data they need.
		Data redundancy and complex backup/restore processing may be required to support a system outage.
	www.dmreview.com /article_sub.cfm?articleId=1041326 (1484 words)

	SIGMOD Conference 1995: 481
		Elke Radeke, Ralf Böttger, Bernd Burkert, Yaron Engel, Gerd Kachel, Silvia Kolmschlag, Dietmar Nolte: Efendi: Federated Database System of Cadlab.
		Elke Radeke, Marc H. Scholl: Federation and Stepwise Reduction of Database Systems.
		Amit P. Sheth, James A. Larson: Federated Database Systems for Managing Distributed, Heterogeneous, and Autonomous Databases.
	www.informatik.uni-trier.de /~ley/db/conf/sigmod/sigmod95-68.html (434 words)

	Application Development Guide (Site not responding. Last check: 2007-10-16)
		DB2 federated database attempts to minimize transferring LOB data from the
		DB2 federated systems use two mechanisms to retrieve LOBs: LOB
		In LOB streaming, LOB data is retrieved in stages.
	www.seas.ucla.edu /db2/db2a0/db2a0145.htm (424 words)

	Print Version - Please advize on how to implement a federated database system. \| Business intelligence, data ...
		If each data mart is independent, it will be important to establish a security system to ensure data protection from unauthorized access.
		Sid Adelman is a principal in Sid Adelman and Associates, an organization specializing in planning and implementing data warehouses, in data warehouse and BI assessments, and in establishing effective data architectures and strategies.
		Evan Levy is a partner and co-founder of Baseline Consulting Group, a multivendor systems integration and consulting firm.
	www.dmreview.com /editorial/dmreview/print_action.cfm?articleId=1041326 (1326 words)

Try your search on: Qwika (all wikis)