( 2) Real-time processing“ Real-time processing” is a mode in which processing occurs the instant data is generated. It is used in conjunction with online systems such as bank ATM and train seating reservation systems.
( 3) Batch processing“ Batch processing” is a mode that accumulates data over a specified period and processes it in batches. Batch processing is automatically performed simply by configuring the processing settings, which allows it to be employed when the computer is normally not in use. It is used for administrative processing such as pay calculations.
4 Client / server system
A“ client / server system” is a system that is configured by designating the roles of a“ server” and“ client.” A server provides services to computers that are connected to the network, while a client requests services from the server.
Provide services
Data
Server
Printer
Provide services
Reference Peer to peer“ Peer to peer” refers to a type of system that comprises a network. In a peer to peer system, computers connected to the network are mutually connected as equals, instead of designating individual roles. For this reason, there is no distinction between servers and clients.
Chapter 8 Computer system
Request services Client
( 1) Characteristics of client / server systems The characteristics of a client / server system are summarized below.
Characteristic
Reduced load on system
Reduced installation cost
Improved efficiency of work
Ease of system expansion
Increased complexity of system management
Description
Roles are divided( processing is distributed) between client and server, reducing the load on the system.
Use of hardware resources( printers, hard disk drives, etc.) is shared, reducing installation costs.
Use of software resources( files, etc.) is shared, improving work efficiency by retrieving necessary data when needed and processing.
Servers and clients can be added easily.
Hardware and software resources must be managed for each server and client, increasing complexity the more the scale of the system increases. Also difficult to isolate the cause and responsibility if an issue arises.
Reference
Web system A“ Web system” is a system that operates on a server and performs two-way communications using a browser.“ Shopping carts” seen on many shopping sites and“ e-mail forms” are a type of Web system applications.
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