PUBLIC MARKS from holyver with tag database

What CouchDB is * A document database server, accessible via a RESTful JSON API. * Ad-hoc and schema-free with a flat address space. * Distributed, featuring robust, incremental replication with bi-directional conflict detection and management. * Query-able and index-able, featuring a table oriented reporting engine that uses Javascript as a query language. What it is Not * A relational database. * A replacement for relational databases. * An object-oriented database. Or more specifically, meant to function as a seamless persistence layer for an OO programming language.

If you need to access a database with Java, you need a driver. This is a list of the drivers available, what database they can access, who makes it, and how to contact them.

MySQL provides a built-in data replication functionality for maintaining identical copies of its data to one or more backend servers, thus providing a simple High Availability mechanism. On the other hand, the Open Source community has several projects to implement failover techniques, being one of them Heartbeat. This article will show you how to implement a clustered, highly available and inexpensive solution based on GNU/Linux and combining MySQL as the database engine and Heartbeat as the failover mechanism. The configuration will consist of a 2-node active/passive cluster.

In route to their final storage destination on the World Wide Web, characters move through various layers of programming interfaces and can cross software and hardware boundaries. This article provides helpful hints and best practices for accurately transporting character data from browser to database … and back again.

PolePosition is a benchmark test suite to compare database engines and object-relational mapping technology. As of today it is by no means complete. Database vendors and open source database project participants are invited to improve the test implementations and to contribute further disciplines ("Circuits"). The PolePosition framework source code will help to implement own tests quickly and to time and output the results as number series and graphic visualisations.

Je suis en train de modéliser en UML une base de données qui à donc un diagramme de classe. Cette BDD contiendra les infos de mon système. Et j'ai un système que je veux développer en JAVA qui a aussi un diagramme de classe. J'ai construit le diagramme de classe du système de façon identique au diagramme de classe de ma BDD. sauf que mon diagramme de classe du sytème contient des méthodes en plus. Je voudrais savoir si mon raisonnement est le bon? Quelqu'un pourrait-il me donner son avis?

Après le faux départ de l´Itanium I, le lancement d´offres de processeurs 64 bits en architecture Intel semble enfin annoncer - mais seulement à moyen terme - plus de puissance pour les applications techniques, plus de performances pour la gestion de grandes bases de données et plus de souplesse pour la consolidation de serveurs. Certaines questions doivent être posées dès maintenant.

C-JDBC is a database cluster middleware that allows any Java™ application (standalone application, servlet or EJB™ container, ...) to transparently access a cluster of databases through JDBC™. You do not have to modify client applications, application servers or database server software. You just have to ensure that all database accesses are performed through C-JDBC.