Using Google as a back-end semantic database
Oracle Database Tips by Donald BurlesonMay 6, 2015
WIP - Not
ready for publication
The promise of Web 2.0 is being
fulfilled and we are now starting to see web "mashups",
sophisticated applications that utilize web API's to communicate
with disparate information sources.
We also see that the web has
changed the fundamental nature of access to information.
In traditional database management we see this historical
Hierarchical model (IMS) - 1960's
Network model (IDMS, IDS, TOTAL) - 1980's
Relational Model (Oracle, DB2, SQL Server) -
Object-Oriented model (Oracle Toplink, Ontos,
The semantic web (Google mashup) - 2015
Let's take a closer look at the
salient features of these software tools as they apply to Web
IMS Hierarchical DBMS - 1960's - 1970's
is a hierarchical linked-list database with one-to-many embedded pointers.
IMS did not naturally represent real-world data relationships (recursive
relationships (BOM), many-to-many structures).
Interestingly, even though IMS is a dinosaur
database, IMS Fastpath remains the world's fastest engine software, capable of
supporting sustained transaction rates in excess of 10,000 per second and
running for a decade without interruption. Check out these
statistics on IMS performance and reliability, as of 2002:
Most Corporate Data is Managed by IMS - Over
90% of Fortune 1000 Companies use IMS.
IMS Manages over 15 Billion GBs of Production
$2 Trillion/day transferred thru IMS by one
Over 50 Billion Transactions a Day run through
IMS Serves Close to 200 Million Users a Day
Over 79 Million IMS Trans/Day
30 Million Trans/Day
7M per hour handled by one customer
6000 Trans/sec across TCP/IP to a single IMS
11,700 Trans/sec (Over 1 Billion/day)
3000 days without an outage at one large
Network Database- 1980's
The work of the Committee on Development of
Symbolic Languages database task group (the CODASYL DBTG) resulted in the
Cullinet product the "Integrated Database Management System", or IDMS, and we
also see IDS and TOTAL as network model databases. IDMS was almost
completely open-source to their customers, and purchasers of IDMS got DESCT
manuals and generous user-exits, making IDMS an extremely powerful engine for
large mainframe systems.
IDMS is an extremely flexible two-way linked list
structure where you can model complex data relationships such as
non-first-normal form records, embedded pointers for object-oriented access. The
original IDMS did not support SQL (later, IDMS/R supported SQL access) and
relied on "realms" and a navigational data access method that required a
programmer to traverse the data structures, unlike SQL which is declarative in
nature and build an execution plan on-the-fly.
The Relational database - 1990's
Object Oriented Databases - 1990's
Crossover with Dr. Kim's UniSQL object/relational
The Semantic web
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