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Topic: Distributed database

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	Distributed database - Wikipedia, the free encyclopedia
		A distributed database is a database that is under the control of a central database management system in which storage devices are not all attached to a common CPU.
		A node in a distributed database system act as a client, a server, or both, depending on the situation.
		Inexperience — distributed databases are difficult to work with, and as a young field there is not much readily available experience on proper practice.
	en.wikipedia.org /wiki/Distributed_database (681 words)

	Distributed database management system - Wikipedia, the free encyclopedia
		A distributed database management system is a software system that permits the management of the distributed database and makes the distribution transparent to the users.
		Sometimes distributed database system is used to refer jointly to the distributed database and the distributed DBMS.
		Distributed database management systems can be architected as client-server systems or peer-to-peer ones.
	en.wikipedia.org /wiki/DDBMS (181 words)

	Distributed Database Management Systems in the Modern Enterprise (Site not responding. Last check: 2007-10-09)
		Distributed databases are much more complex than their centralized database cousins, but when properly implemented in the appropriate enterprise applications, they can provide great benefits to the organizations they support.
		Distributed database systems are based upon several models and their implementations can include a number of different features.
		One of the reasons for using distributed database systems is to allow small portable systems to use a copy of the database, normally a subset, for a mobile worker who connects to the network on an infrequent basis.
	www.cs.umanitoba.ca /~qtrinh/research/paperSource/17.html (9953 words)

	Distributed Database Concepts
		Database links are essentially transparent to the users of an Oracle distributed database system, because the name of a database link is the same as the global name of the database to which the link points.
		In a distributed database, a schema object such as a table is accessible to all applications in the system.
		Distributed database applications typically use distributed transactions to access both local and remote data and modify the global database in real-time.
	www.csee.umbc.edu /help/oracle8/server.815/a67784/ds_ch1.htm (4048 words)

	Distributed database overview (Site not responding. Last check: 2007-10-09)
		A distributed database can be defined as consisting of a collection of data with different parts under the control of separate DBMSs running on independent computer systems.
		In a distributed DBMS a relational table or a partition may be replicated or copied, and copies may be distributed throughout the database.
		An advantage of distributed databases is that users at a given site are able to access data stored at other sites and at the same time retain control over the data at their own site.
	learningat.ke7.org.uk /itweb/year13/distproc1.htm (1178 words)

	Oracle Distributed Systems--Sample chapter
		Databases may be aligned with geographic boundaries, such as a behemoth database at a headquarters site and smaller databases at regional offices.
		Whenever a redo log is archived in the primary database, the archived redo log is applied to the standby database, as shown in Figure 1-2.
		A distributed database system, illustrated in Figure 1-3, is an environment in which data in two or more database instances is accessible as though this data were in a single instance.
	www.oreilly.com /catalog/ordistsys/chapter/ch01.html (5046 words)

	Distributed Database System Application Development
		If the network connection between the two databases fails, some DML statements against the child table (those that insert rows into the child table or update a foreign key value in the child table) cannot proceed because the referential integrity triggers must have access to the parent table in the HQ database.
		A distributed query is decomposed by the local Oracle into a corresponding number of remote queries, which are sent to the remote nodes for execution.
		As illustrated in the introduction to "Tuning Distributed Queries", the optimizer's main task is to rewrite a distributed query to use collocated inline views.
	www.cs.umbc.edu /help/oracle8/server.815/a67784/ds_ch5.htm (2515 words)

	Principles of Distributed Database Systems, Second Edition (Site not responding. Last check: 2007-10-09)
		In the Second Edition of this best-selling distributed database systems text, the authors address new and emerging issues in the field while maintaining the key features and characteristics of the First Edition.
		This comprehensive text focuses on concepts and technical issues while exploring the development of distributed database management systems.
		Principles of Distributed Database Systems presents distributed database systems within the framework of distributed data processing in general, rather than as a problem in isolation.
	www.cs.ualberta.ca /~database/ddbook.html (109 words)

	Catalog of free database systems
		Distributed commits are performed across servers and clients have access to an interface allowing participation in distributed commits managed by an external agent.
		It includes a database library, a schema compiler, a database consistaency checker, import and export routines, and curses programs to modify the database schema and the data in the database.
		The separation of the database from the user interface through intermediary Application Objects allows the data to be distributed appropriately across database servers and still have the user interface display data cohesively for the end-user.
	www.faqs.org /faqs/databases/free-databases (11599 words)

	DBMS - May 1997 - Database Replication
		Managing a distributed database is vastly more difficult than managing a centralized database, and time spent justifying and planning for the extra work is worthwhile.
		When you set up a database link and use it in a transaction that updates two databases, Oracle's two-phase commit transparently makes sure the transaction completes successfully (or rolls back the completed part of transaction if it is not successful).
		Database objects are defined as publications on the source server, and they are subscribed to by the target server(s).
	www.dbmsmag.com /9705d15.html (4163 words)

	CSE5200 Distributed Database Systems (Site not responding. Last check: 2007-10-09)
		At the completion of this subject students should be able to understand different distributed database management algorithms to support concurrency, transaction management, query optimisation, replication, recovery, distributed database design and security; implement a client-server DBMS and distributed database applications.
		Distributed databases - various contemporary issues including data model partitioning, fragmentation, replication issues, query optimisation, concurrency control, restart and recovery, distributed database design, client-server and distributed database applications.
		Particular attention will be paid to detailed consideration of distributed database management issues.
	www.csse.monash.edu.au /courseware/cse5200 (535 words)

	What is distributed database? - A Word Definition From the Webopedia Computer Dictionary
		A database that consists of two or more data files located at different sites on a computer network.
		Because the database is distributed, different users can access it without interfering with one another.
		However, the DBMS must periodically synchronize the scattered databases to make sure that they all have consistent data.
	www.webopedia.com /TERM/D/distributed_database.html (194 words)

	Distributed Database Systems Slides
		These are the beginning slides which provide an overview of the entire contnets and a comprehensive list of additional references on distributed databases.
		They define what a distributed DBMS is, places it in the general context of distributed computing systems, presents the fundamental assumptions that are made about the distributed DBMS technology and discusses the various problems that need to be addressed to make these systems a reality.
		The architectural discussion is motivated by a taxonomy of different ways of developing a DBMS which identifies the differences between "distributed DBMSs" and what are commonly called "distributed multidatabase systems".
	web.cs.ualberta.ca /~ozsu/ddbs.html (810 words)

	COMP-577: Distributed Database Systems (Fall Term 2004, School of Computer Science, McGill University)
		Distributed transaction management requires enhanced concurrency control methods and must be fault-tolerant.
		Distributing data across several sites requires a careful design and needs special mechanisms to access and query the distributed data transparently and efficiently.
		That is, the course attempts to cover the wide sprectrum from theory to practice, from the development of a 10-line informal algorithm to its implemenation and integration into a complex distributed infrastructure.
	www.cs.mcgill.ca /~cs577 (1138 words)

	Distributed Database Technology (Site not responding. Last check: 2007-10-09)
		A Distributed Database Management System is a software system that permits the management of distributed data, making the distribution transparent to the user.
		Their implementations with respect to the issues of distributed database technology markedly differ.
		A State of the Art Review of Distributed Database Technology, a bound, 40 page report, is available for $25 from the DACS.
	www.dacs.dtic.mil /techs/abstracts/ddbms.html (153 words)

	[No title]
		Azureus now has a distributed, decentralised database that can be used to track decentralised torrents.
		The "virtual" torrents make use of the Distributed Database as their tracker, so while you can use the Chat Plugin without the Distributed Database, you won't be able to use the virtual channel feature if you disable the Distributed Database.
		This plugin uses the Distributed Database, so you need to have the Distributed Database enabled for it to work.
	azureus.sourceforge.net /whatsnew2300.php (735 words)

	Distributed Database Systems Research (RAID Project) (Site not responding. Last check: 2007-10-09)
		We are conducting both theoretical and experimental studies in the areas of large scale distributed systems, support for object-oriented systems on top of relational implementation, mobile computing, legacy issues of database systems, adaptability to failures, replicated copy control, site failure/recovery, communication systems, and support for multimedia applications.
		We are studying the relationship between database and operating systems as well as exploring opportunities to employ parallelism at various levels.
		We are building an experimental facility to conduct studies in large scale distributed database systems that involve hundreds of sites distributed across the world.
	www.cs.purdue.edu /AnnualReports/95/AR95Book-74.html (153 words)

	Mariposa: A New Approach to Distributed Data (Site not responding. Last check: 2007-10-09)
		The Mariposa distributed database management system is an ongoing research project at the University of California at Berkeley.
		Mariposa addresses fundamental problems in the standard approach to distributed data management.
		Mariposa allows DBMSs which are far apart and under different administrative domains to work together to process queries, by means of an economic paradigm in which processing sites buy and sell data and query processing services.
	mariposa.cs.berkeley.edu (189 words)

	Database Bibliography
		database is updated only by a fixed set of encapsulated transactions defined in the schema; constraints can be automatically maintained; preserve constraints and soundness; preservation and soundness are unsolvable for arbitrary first-order constraints.
		Now the database manages all information, the object represenations can be changed via database updates, and the representations mappings can be expressed as database commands or rules.
		The strength of the paper is its rigor, the weakness is in the applicability of the model.
	www-db.stanford.edu /pub/gio/biblio/master.html (7964 words)

	Distributed hash table - AzureusWiki
		The distributed database in all current Azureus builds (>=2.3.0.0) is based on a UDP based Distributed Hash Table (DHT).
		In particular Azureus uses a modified Kademlia implementation.
		The DHT acts like a transparent, distributed Hash Table (thus the name) with node IDs based on the SHA-1 hash of the node's IP/Port combination.
	azureus.aelitis.com /wiki/index.php/DistributedTrackerAndDatabase (318 words)

	Distributed Database Consulting, Inc. (Site not responding. Last check: 2007-10-09)
		DDBC tackles extremely complex database and systems integration projects, provides thoughtful, tested solutions on time and on or under budget, and invariably exceeds the expectations of our clients.
		The abilities of our small, nimble, and highly-qualified team of consultants rival even the largest players in the IT consulting space, and we do so at a lower cost.
		We do this by hiring exceptional talent, following time-tested processes and methodologies, and bringing our vast experience and value-driven philosophy to bear on every project.
	www.ddbcinc.com (82 words)

	Oracle8: Distributed Database Implementation - Ilt
		In this course, participants learn data placement design methods for implementing robust distributed applications and databases.
		Students gain hands-on experience creating database links for server-server connections as well as read-only snapshots for table replication.
		Troubleshooting distributed transactions and recovering distributed database is also addressed.
	www.oracle.com /global/au/education/new_desc/30024.html (214 words)

	Oracle8i Distributed Database Systems -- Contents (Site not responding. Last check: 2007-10-09)
		Part I Distributed Database Systems Concepts and Administration
		Part II Distributed Transactions Concepts and Administration
		Controlling the Array Fetch Between Oracle Database Server and Agent
	www.usd.edu /oracle/doc/server.817/a76960/toc.htm (275 words)

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