... home ...

databases: Definition and Recommended Links

Our favorite links for this topic area. Enjoy, fellow researchers! Questions, comments, new links? Email eewindow@aol.com!.

A database is a structured collection of records or data. A computer database relies upon software to organize the storage of data. The software models the database structure in what are known as database models. The model in most common use today is the relational model. Other models such as the hierarchical model and the network model use a more explicit representation of relationships (see below for explanation of the various database models).

Database management systems (DBMS) are the software used to organize and maintain the database. These are categorized according to the database model that they support. The model tends to determine the query languages that are available to access the database. A great deal of the internal engineering of a DBMS, however, is independent of the data model, and is concerned with managing factors such as performance, concurrency, integrity, and recovery from hardware failures. In these areas there are large differences between products.

Source: Wikipedia (http://en.wikipedia.org/wiki/Database)

other great electronics sites:ee toolbox site

• • databases
    • A database is a structured collection of records or data. A computer database relies upon software to organize the storage of data. The software models the database structure in what are known as database models. The model in most common use today is the relational model. Other models such as the hierarchical model and the network model use a more explicit representation of relationships (see below for explanation of the various database models).

      Database management systems (DBMS) are the software used to organize and maintain the database. These are categorized according to the database model that they support. The model tends to determine the query languages that are available to access the database. A great deal of the internal engineering of a DBMS, however, is independent of the data model, and is concerned with managing factors such as performance, concurrency, integrity, and recovery from hardware failures. In these areas there are large differences between products.

      Source: Wikipedia (http://en.wikipedia.org/wiki/Database)

      (Note: The Electronic Engineers Toolbox provides an alternative set of featured links for this word at http://www.cera2.com/database.htm)

      Featured Links:

      File System for SOC, Storage, Consumer and Embedded OSes

      Need a file system? Check out Rtfs 6. It is based on over 20 years commercial experience providing FAT based embedded file management for system on chip, storage solutions, consumer appliance and embedded operating systems. This latest release provides Journaling and can handle huge data requirements easily, adding realtime IO, fast directory operations, non 512 byte sectors and a rich API for precise extent management and DMA and DVR applications development.
      http://www.ebsembeddedsoftware.com/product_ertfs_overview.htm

      Perst Embedded Database Version 3.0 Adds Major New Features

      McObject® has released Perst version 3.0, a major upgrade of its open source, object-oriented embedded database system. Developers working with both the all-Java and all-.NET editions of Perst will benefit from improvements including built in full-text search, powerful compression in embedded Java, and native language querying (LINQ) for .NET. The new release also offers greatly enhanced documentation including a MSDN-like Perst API...
      http://www.mcobject.com

      db4objects and the Dual Licensing Model

      The dual licensing model is fast becoming one of the most popular business models for software companies leveraging the power of both open- and closed-source software development. It is important for users of software to understand how to leverage this model, without jeopardizing their intellectual property rights or risking the negative publicity that results from violating open source licenses. This white paper explains the factors...
      http://www.db4o.com

      File System Offers Extraordinary Performance and Reliability

      Need a file system? Check out Rtfs 6. It is based on over 20 years commercial experience providing FAT based embedded file management for system on chip, storage solutions, consumer appliance and embedded operating systems. This latest release provides Journaling and can handle huge data requirements easily, adding realtime IO, fast directory operations, non 512 byte sectors and a rich API for precise extent management and DMA and DVR applications development.
      http://www.ebsembeddedsoftware.com/eg3_ertfs_overview.htm

      Enea Adds Fault Tolerance to Polyhedra FlashLite Relational Database Management System

      Enea has announced the availability of new fault-tolerant capabilities for its Polyhedra® FlashLite relational database management system. The flash-based embedded RDBMS now offers full redundancy with instant failover and reconnection, making it ideal for applications requiring five nines or higher availability. Polyhedra FlashLite also features 'hot upgrades' and supports two new platforms, Windows Vista and VxWorks 6.x. Polyhedra...
      http://www.enea.com

      The Database Behind the Brains

      Mobile devices, information appliances, intelligent control systems; no deep investigation is needed to uncover the spreading frontiers of computer applications that have nothing to do with desktops. These systems are usually referred to as ''embedded systems,'' but that term does not express the growing sophistication of such applications.
      http://db4o.com

      Building Carrier Grade Applications Using a Highly Available Database Management System

      In many areas, including the network infrastructure, developers are challenged with the task of building applications that run for very long periods without appreciable downtime. These are called highly available applications. Because they often manage large amounts of data, such applications are well-served by a high-availability database management system (HA-DBMS). This paper discusses the value of an HA-DBMS, and some key tradeoffs which...
      http://www.iec.org/online/tutorials/carrier_grd_apps/

      Birdstep Technology announces the upcoming release of its Raima Database Manager

      Technology (OSE: BIRD) today announced the upcoming release of version 8.1 of its popular Raima Database Manager Server, also known as RDM Server. This will be the latest release from the Raima Database Management Family of products, providing exciting new capabilities and functionality for embedded systems application developers. Below are a few of the new features released in RDM Server 8.1: Dynamic Role Switching - an important feature...
      http://www.raima.com

      McObject Releases eXtremeDB Kernel Mode (Embedded Database)

      McObject® has released eXtremeDB Kernel Mode (KM), a version of the company’s in-memory embedded database system designed for deployment in the operating system kernel. By operating at this innermost and most privileged level of computer systems, eXtremeDB-KM leverages the high priority, zero-latency responsiveness afforded to kernel tasks and meets the data sorting, access and retrieval needs of applications that place key functions there....
      http://www.mcobject.com

      In-Memory Databases for Voice and Data Networks

      Mass acceptance of the Internet, mobile telephony, and high-speed network services has changed the way individuals communicate, necessitating a fundamental shift in the way these services are delivered. In this market, attracting and keeping customers means bringing innovative new services to market quickly, while ensuring that those services can scale to meet high volumes of subscribers reliably. In direct response to these demands,...
      http://www.iec.org/online/tutorials/in_memory/

      Explanation: these links are provided as part of our EE glossary project, which seeks to identify the most prominent keywords in embedded systems, embedded software, realtime and rtos, dsp (digital signal processing), system-on-a-chip, microprocessors and microcontrollers, and other constituent elements for embedded systems. While we seek to keep most of the links up-to-date, the user is refered to other primary electronic-based search sites such as: cera2.com, embedded.com, or EDN Magazine. If you have any suggestions of links or definitions, please email!

Mark Twain quote for the day:

The so-called Christian nations are the most enlightened and progressive...but in spite of their religion, not because of it. The Church has opposed every innovation and discovery from the day of Galileo down to our own time, when the use of anesthetic in childbirth was regarded as a sin because it avoided the biblical curse pronounced against Eve. And every step in astronomy and geology ever taken has been opposed by bigotry and superstition. The Greeks surpassed us in artistic culture and in architecture five hundred years before Christian religion was born.
- Mark Twain, a Biography