Transcript Document

• network database
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Database model Network model
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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.
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Database 1960s Navigational DBMS
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IDMS and Cincom Systems' TOTAL
database are classified as network
databases.
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CODASYL - History
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In October 1969 the DBTG published its
first language specifications for the
network database model which became
generally known as the Codasyl Data
Model
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CODASYL - History
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formally withdrawn in 1998.
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Object-relational impedance mismatch - Philosophical differences
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.
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MySQL Cluster
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).
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Relational database management system
Relational databases have often
replaced legacy hierarchical
databases and network databases
because they are easier to understand
and use
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Database management system - 1960s Navigational DBMS
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IDMS and Cincom Systems' Cincom
Systems#1970s|TOTAL database are
classified as network model|network
databases.
https://store.theartofservice.com/the-network-database-toolkit.html
Relational database management systems
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Relational databases have often replaced
legacy hierarchical databases and network
databases because they are easier to
understand and use
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Relational model - Implementation
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.
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Graph database
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General graph databases that can store
any graph are distinct from specialized
graph databases such as triplestores and
network database model|network
databases.
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Network model - Overview
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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.
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Learning to learn - Transfer of Knowledge
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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.
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Integrated Data Store
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'Integrated Data Store' ('IDS') was an early
network database largely used by industry,
known for its high performance.
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Database - Examples
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* 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.
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IDMS - History
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.
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HP3000 - Software pioneering
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
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Interbase - Early years
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
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Cullinet - Products
; 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.
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PNNI
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To build the PNNI network database,
each PNNI node must receive topology
information from all the other devices
in the network
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MUMPS - Overview
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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 flatfile, relational and network database
features.
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IDEF1X - Logical Database Design Technique
Later models were transformed into
database designs for Cullinet's network
database, IDMS, and many varieties of
relational database
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Relational database system
Relational databases have often
replaced legacy hierarchical databases
and network databases because they
are easier to understand and use
1
https://store.theartofservice.com/the-network-database-toolkit.html
Database models - Network model
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.
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Database models - Network model
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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
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.
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Toll-free telephone number - North America
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 longdistance geographic telephone number, a
T-carrier or primary rate interface line
under the control of any of various
RespOrgs
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Protein–protein interaction - Protein-protein interaction databases
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 (MIPSMPact), and MIPS Mammalian
Protein-Protein Interaction Database
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List of biological databases - Protein-protein interaction|Protein-protein and other
molecular interactions
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# [http://www.bind.ca/ BIND
Biomolecular Interaction
Network Database]
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List of biological databases - Signal transduction pathway databases
# [http://www.cancersystemsbiology.org/datasoftware.htm
Literature-curated human signaling
network, the largest human signaling
network database]
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Data Base - 1960s, navigational DBMS
IDMS and Cincom Systems' Cincom
Systems#1970s|TOTAL database are classified as
network databases
1
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Unisys OS 2200 databases
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This commonality has made it possible
for clients to modernize applications
moving from language files, to a
network database, to a relational
database
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Air Canada Flight 621 - History
I have given up.[http://aviationsafety.net/database/record.php?id=197007
05-0 Aviation Safety Network Accident
Description, CF-TIW], Aviation Safety
Network Database, 2013.[http://aviationsafety.net/investigation/cvr/transcripts/cvr_
ac621.php CVR transcript Air Canada
Flight 621 - 05 JUL 1970], Aviation Safety
Network Database, 2013
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Air Inter - Incidents and accidents
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://aviationsafety.net/database/dblist.php?sorteer=dat
ekey_desckind=%cat=%page=1field=Oper
atorkeyvar=6668 Air Inter at the Aviation
Safety Network Database]
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Antonio B. Won Pat International Airport - Incidents and accidents
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.
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Harare - Climate
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Records begin in October 1890 but all
three Harare stations stopped reporting
in early 2004.Global Historic Climate
Network database NGDC
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Hydranencephaly - Prognosis
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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