Database machine

A database machines or back end processor is a computer or special hardware that stores and retrieves data from a database. It is specially designed for database access and is coupled to the main (front-end) computer(s) by a high-speed channel. The database machine is tightly coupled to the main CPU, whereas the database server is loosely coupled via the network. Database machines can transfer large packets of data to the mainframe using hundreds to thousands of microprocessors with database software. The front end processor receives the data and displays it. The back end processor on the other hand analyzes and stores the data from the front end processor. Back end processors result in higher performance, increasing host main memory, increasing database recovery and security, and decrease of cost to manufacture. The database machine contrasts with a database server, which is a computer in a local area network that holds a database.

According to Julie A. McCann, "Currently a DBMS controls the organisation, storage and retrieval of data whilst regulating the security and integrity of the database, it accepts requests for data from the application programs and instructs the operating system (OS) to transfer the appropriate data."^[1]

An example is the IBM System/38.

Database

Main	Requirements Theory Models Database management system Machine Server Application Connection datasource DSN Administrator Lock Types Tools

Languages	Data definition Data manipulation Query information retrieval

Security	Activity monitoring Audit Forensics Negative database

Design	Entities and relationships (and Enhanced notation) Normalization Refactoring

Programming	Abstraction layer Object-relational mapping

Management	Virtualization Tuning caching Migration Preservation Integrity

See also	Database-centric architecture Intelligent database Two-phase locking Locks with ordered sharing Load file Publishing Halloween Problem Log shipping

Book Category WikiProject

This article is based on material taken from the Free On-line Dictionary of Computing prior to 1 November 2008 and incorporated under the "relicensing" terms of the GFDL, version 1.3 or later.

References

↑ Mccann, Julie A. (2002-12-19). "The Database Machine: Old Story, New Slant?". ResearchGate.

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