network database

• network database

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Database model Network model

1 Although it is not an essential feature of the model, network databases

generally implement the set relationships by means of pointers

that directly address the location of a record on disk. This gives excellent

retrieval performance, at the expense of operations such as

database loading and reorganization.


Database 1960s Navigational DBMS

1 IDMS and Cincom Systems' TOTAL database are classified

as network databases.


CODASYL - History

1 In October 1969 the DBTG published its first language specifications for the network database model which

became generally known as the Codasyl Data Model


CODASYL - History

1 ANSI and ISO adopted the Codasyl database specifications under the name

Network Database Language (NDL), with work taking place within the same

working group (X3H2) as SQL standardization. An ISO standard for

NDL was ratified as ISO 8907:1987, but, as it never had any practical effect on

implementations, it was formally withdrawn in 1998.


Object-relational impedance mismatch - Philosophical differences

1 Normalization — Relational normalization practices are often ignored by OO

designs. However, this may just be a bad habit instead of a native feature of OO. An alternate view is that a collection of objects, interlinked via pointers of some

sort, is equivalent to a network database; which in turn can be viewed as

an extremely denormalized relational database.


MySQL Cluster

1 MySQL Cluster is a technology providing shared-nothing clustering and auto-

sharding for the MySQL database management system. It is designed to

provide high availability and high throughput with low latency, while

allowing for near linear scalability. MySQL Cluster is implemented through the NDB

or NDBCLUSTER storage engine for MySQL ("NDB" stands for Network Database).


Relational database management system

1 Relational databases have often replaced legacy hierarchical

databases and network databases because they are easier to

understand and use


Database management system - 1960s Navigational DBMS

1 IDMS and Cincom Systems' Cincom Systems#1970s|TOTAL database are classified as network model|network

databases.


Relational database management systems



understand and use


Relational model - Implementation

1 After the relational model was defined, there were many attempts

to compare and contrast the different models, and this led to the

emergence of more rigorous descriptions of the earlier models;

though the procedural nature of the data manipulation interfaces for

hierarchical and network databases limited the scope for formalization.


Graph database

1 General graph databases that can store any graph are distinct from

specialized graph databases such as triplestores and network database

model|network databases.


Network model - Overview

1 Until the early 1980s the performance benefits of the low-level navigational interfaces offered by hierarchical and

network databases were persuasive for many large-scale applications, but as hardware became faster, the extra productivity and flexibility of the

relational model led to the gradual obsolescence of the network model in

corporate enterprise usage.


Learning to learn - Transfer of Knowledge

1 The aim of project RoboEarth is to use the Internet to create a giant open source

network database that can be accessed and continually updated by robots around the

world. With knowledge shared via the cloud on such a vast scale, and with businesses

and academics contributing independently on a common language platform, RoboEarth has

the potential to provide a powerful feed forward to any robot’s 3D sensing, acting and

learning capabilities.


Integrated Data Store

1 'Integrated Data Store' ('IDS') was an early network database largely used

by industry, known for its high performance.


Database - Examples

1 * A graph database is a kind of NoSQL database that uses Graph (data structure)|graph structures

with nodes, edges, and properties to represent and store information.

General graph databases that can store any graph are distinct from

specialized graph databases such as triplestores and network database

model|network databases.https://store.theartofservice.com/the-network-database-toolkit.html

IDMS - History

1 Codd, the father of the relational model) that there was a significant

difference between a relational database and a network database

with a relational veneer.


HP3000 - Software pioneering

1 The key development that led to the tremendous success of the HP 3000

was the bundling of the HP-developed network database

management system (DBMS) called IMAGE (now called TurboIMAGE/SQL) that was reputedly inspired by the

TOTAL DBMS developed by Cincom|Cincom Systems, Inc


Interbase - Early years

1 Jim Starkey was working at Digital Equipment Corporation|DEC on their Datatrieve network database product when he came up with an idea for a

system to manage concurrent changes by many users


Cullinet - Products

1 ; IDMS : A CODASYL network model|network database management

system first developed at Goodrich Corporation|B.F. Goodrich. John Cullinane acquired the rights to market IDMS in the early 1970s.

IDMS legacy systems are still being run today. Only a few customers

have migrated to IDMS/R.


PNNI

1 To build the PNNI network database, each PNNI node must receive

topology information from all the other devices in the network


MUMPS - Overview

1 Although MUMPS does not natively offer a full set of Database

Management System|DBMS features such as mandatory schemas, several

DBMS systems have been built on top of it that provide application

developers with flat-file, relational and network database features.


IDEF1X - Logical Database Design Technique

1 Later models were transformed into database designs for Cullinet's

network database, IDMS, and many varieties of relational database


Relational database system



understand and use


Database models - Network model

1 The network database|network model expands upon the hierarchical

structure, allowing many-to-many relationships in a tree-like structure that allows multiple parents. It was

the most popular before being replaced by the relational model, and

is defined by the CODASYL specification.


Database models - Network model

1 Although it is not an essential feature of the model, network databases

generally implement the set relationships by means of pointer (computer programming)|pointers

that directly address the location of a record on disk. This gives excellent

retrieval performance, at the expense of operations such as

database loading and reorganization.https://store.theartofservice.com/the-network-database-toolkit.html

Geni.com - Features

1 The service uses the contact information to invite additional members to join, and builds a comprehensive social network database from the information

collectively entered by members. For now users may only see information

belonging to themselves and to people in their immediate network who have given them permission.


Toll-free telephone number - North America

1 North American toll-free numbers are controlled by an intelligent network database (SMS/800) in which any

toll-free number may be directed to a local or long-distance geographic telephone number, a T-carrier or

primary rate interface line under the control of any of various RespOrgs


Protein–protein interaction - Protein-protein interaction databases

1 Examples: Database of Interacting Proteins|DIP, Biomolecular Interaction Network Database (BIND), Biological General Repository for Interaction Datasets

(BioGRID), Human Protein Reference Database (HPRD), IntAct Molecular

Interaction Database, Molecular Interactions Database (MINT), MIPS Protein Interaction Resource on Yeast (MIPS-MPact), and MIPS

Mammalian Protein-Protein Interaction Database (MIPS-MPPI).


List of biological databases - Protein-protein interaction|Protein-protein and other molecular interactions

1 # [http://www.bind.ca/ BIND Biomolecular Interaction Network

Database]


List of biological databases - Signal transduction pathway databases

1 # [http://www.cancer-systemsbiology.org/datasoftware.htm Literature-curated human signaling

network, the largest human signaling network database]


Data Base - 1960s, navigational DBMS

1 IDMS and Cincom Systems' Cincom Systems#1970s|TOTAL database are

classified as network databases


Unisys OS 2200 databases

1 This commonality has made it possible for clients to modernize

applications moving from language files, to a network database, to a

relational database


Air Canada Flight 621 - History

1 I have given up.[http://aviation-safety.net/database/record.php?id=19700705-0 Aviation Safety

Network Accident Description, CF-TIW], Aviation Safety Network

Database, 2013.[http://aviation-safety.net/investigation/cvr/transcript

s/cvr_ac621.php CVR transcript Air Canada Flight 621 - 05 JUL 1970], Aviation Safety Network Database,

2013https://store.theartofservice.com/the-network-database-toolkit.html

Air Inter - Incidents and accidents

1 There were 12 recorded incidents/accidents involving Air Inter aircraft throughout 37 years of uninterrupted commercial operations, three

of which were fatal. One of the other nine reported incidents included an aircraft

hijacking, resulting in the loss of one life.[http://aviation-safety.net/database/dblist.php?

sorteer=datekey_desckind=%cat=%page=1field=Operatorkeyvar=6668 Air Inter

at the Aviation Safety Network Database]


Antonio B. Won Pat International Airport - Incidents and accidents

1 For a comprehensive list of all accidents relating to Guam, visit the Aviation Safety Network database by linking to it from the external links

section below.


Harare - Climate

1 Records begin in October 1890 but all three Harare stations stopped

reporting in early 2004.Global Historic Climate Network database

NGDC


Hydranencephaly - Prognosis

1 The prognosis for children with hydranencephaly is generally quite poor. Death often occurs in the first year of life, but other children may

live several years. The oldest known person living with hydranencephaly

is 33 years old (as of August 2013).Global Hydranencephaly

Foundation Family-to-Family Resource Network database


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network database

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network database language

stotal database

database loading

network modelnetwork

cincom systems total

legacy hierarchical

relational model