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Database Classifications

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Database Classifications. CIS 10, Group #1 May 27 , 2006 C . X . A . L . L . H . A.V. L . C. Introduction. Introduction. I. Single-User vs. Multi-user Systems II. Client- Server Systems III. N- Tier Database Systems IV. Centralized vs. - PowerPoint PPT Presentation
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Database Classifications CIS 10, Group #1 May 27, 2006 C.X. A.L. L.H. A.V. L.C.
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Page 1: Database Classifications

Database Classifications

CIS 10, Group #1 May 27, 2006

C.X.

A.L.

L.H.

A.V.

L.C.

Page 2: Database Classifications

I. Single-User vs.

Multi-user Systems

II. Client- Server

Systems

III. N- Tier Database

Systems

IV. Centralized vs.

Distributed Database

Systems

V. In- Memory Database

IntroductionIntroduction

Page 3: Database Classifications

I. Single-User vs. Multiuser Systems

Single-user: Located on a PC and

accessed by one user. Widely used for

personal applications and very small businesses.

Multiuser: Accessed via a network becaus

e two or more users try to access and modify the same data at the same time.

Some type of database locking must be used to prevent users from making conflicting changes.

Page 4: Database Classifications

II. Client-Server Systems

Has both clients and at least one server.

The client is called the front end and database server is called the back end which contain database itself and it processes the commands coming from the front-end client PCs.

Page 5: Database Classifications

II. Client-Server Systems

Lower hardware cost and scalability

PCs are easier to use and much less expensive than larger computers.

Can add a new server or more power to give extra capacity

The most common type of database system

Page 6: Database Classifications

Client

Server

Client

Middleware

Server

2- TIER MODELN- TIER MODEL(The middleware section can be one or more programs stored on one or more computers)

III. N-Tier Database Systems

Page 7: Database Classifications

Special News online…

Page 8: Database Classifications

CENTRALIZED vs.

DISTRIBUTED DATABASE SYSTEMS

Centralized database system:

A database is

CIS 10 NEWS ONLINE

located in its entirety

on a single

computer.

Page 9: Database Classifications

Distributed database system: The data is divided among several computers connected via a network.

The data is logicallyviewed as belonging to a single database.

The data can be accessed by any authorized user through the network.

CIS 10 NEWS ONLINE

Page 10: Database Classifications

IN-MEMORY DATABASES

(IMDBs) Databases that are designed to hold all data in the main memory of the computer, rather than on disk.

Perform dramatically faster than disk-based databases.

Used both in high-end systems (e-commerce applications) and in small-footprint (set-top boxes).

Notice: remember to back up data or to store the data periodically on a non-volatile medium.

Giving You CIS 10 News Giving You Power in Your Life

Page 11: Database Classifications

CIS 10TV

ConclusionConclusion

Database systems

Classified in a variety of manners.

Page 12: Database Classifications

The End...

Cast:C.X. A.L.L.H. A.V. L.C.


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