Intro to servers
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The document discusses different types of servers including application servers, audio/video servers, chat servers, database servers, fax servers, groupware servers, IRC servers, list servers, mail servers, name servers, news servers, telnet servers, and print servers. It then provides definitions for key database terms like database, data, structured data, unstructured data, information, and metadata. Finally, it outlines the components of a database environment including CASE tools, repositories, database management systems, applications, user interfaces, data administrators, system developers, and end users.
Intro to servers
- 2. 2 Server TypesServer Types Application Servers – also known as Middleware handles all application operations between users and a database Audio/Video Servers –Enable Websites to broadcast streaming and multimedia content Chat Servers – enable a large number of users to exchange information in an environment similar to Internet newsgroups that offer real-time discussion
- 3. 3 Server Types (cont.)Server Types (cont.) Database Servers – server that performs tasks such as data analysis and storage Fax Servers –Enables network to control incoming and outgoing telephone resources Groupware Servers – enables users to use the internet or intranet to collaborate regardless of location in a virtual atmosphere
- 4. 4 Server Types (cont.)Server Types (cont.) IRC Servers – Internet Relay Chat enables real-time discussion capabilities List Servers – offers a better way to manage mailing lists, whether they be interactive discussions open to the public or one-way lists that deliver announcements, newsletters, or advertising Mail Servers – move and store mail over corporate networks and across the Internet
- 5. 5 Server Types (cont.)Server Types (cont.) Name Servers – also known as DNS servers— map the human-readable names to the IP addresses News Servers – distribution and delivery source for the thousands of public news groups accessible over the USENET news network Telnet Servers – allows users to log on to a host computer and perform tasks as if they’re working on the remote computer itself Print Server- shares and maintains network printers, can join the domain server.
- 6. DATABASE:: ORGANIZED COLLECTION OF LOGICALLY RELATED DATA DATA:: STORED REPRESENTATIONS OF MEANINGFUL OBJECTS AND EVENTS STRUCTURED:: NUMBERS, TEXT, DATES UNSTRUCTURED:: IMAGES, VIDEO, DOCUMENTS INFORMATION:: DATA PROCESSED TO INCREASE KNOWLEDGE IN THE PERSON USING THE DATA METADATA:: DATA THAT DESCRIBES THE PROPERTIES AND CONTEXT OF USER DATA Definitions 6
- 7. A SOFTWARE SYSTEM THAT IS USED TO CREATE, MAINTAIN, AND PROVIDE CONTROLLED ACCESS TO USER DATABASES ADVANTAGES OF THE DATABASE APPROACHADVANTAGES OF THE DATABASE APPROACH 1..PROGRAM-DATA INDEPENDENCE 2.PLANNED DATA REDUNDANCY 3.IMPROVED DATA CONSISTENCY 4.IMPROVED DATA SHARING 5.INCREASED APPLICATION DEVELOPMENT 6.PRODUCTIVITY 7.ENFORCEMENT OF STANDARDS 8.IMPROVED DATA QUALITY 9.IMPROVED DATAACCESSIBILITY AND RESPONSIVENESS 10.REDUCED PROGRAM MAINTENANCE 11.IMPROVED DECISION SUPPORT Database Management System 7
- 8. Costs and Risks of the Database Approach 1.New, specialized personnel 2.Installation and management cost and complexity 3.Conversion costs 4.Need for explicit backup and recovery 5.Organizational conflict 8
- 9. Components of the Database Environment 9
- 10. Components of the Database Environment 1.CASE Tools–computer-aided software engineering 2.Repository–centralized storehouse of metadata 3.Database Management System (DBMS) – software for managing the database 4.Database–storehouse of the data 5.Application Programs–software using the data 6.User Interface–text and graphical displays to users 10
- 11. 7.DATA/DATABASE ADMINISTRATORS– PERSONNEL RESPONSIBLE FOR MAINTAINING THE DATABASE 8.SYSTEM DEVELOPERS–PERSONNEL RESPONSIBLE FOR DESIGNING DATABASES AND SOFTWARE 9.END USERS–PEOPLE WHO USE THE APPLICATIONS AND DATABASES Components of the Database Environment 11
- 12. The Range of Database Applications Personal databases Workgroup databases Departmental/divisional databases Enterprise database 12