Operating Sysyem – An operating system is a program that manage a computer hardware and provide plateform for application program that act as an interface between computer user and computer hardware.
OPERATING SYSTEM
Types of operating system –
1.
Desktop System
2.
Main Frame
System
3.
Multiprocessor
System
4.
Clustered System
5.
Distributed
System
6.
Hand held system
7.
Real Time
Embedded System
1)
Desktop System –
·
In desktop computer uses sit in front of pc , Consisting of monitor,keybord and
system unit.
·
Such type of
system is design for one user to access it.
·
The goal is to
Maximize the work that user is performing.
·
In this case
this operating system is design for easy of use.
·
Focus on
performance of user not for resource utilization.
·
Such system
required for single user not for multiple user
·
Microsoft window
and apple mac operating system is an example of such type of software
2)
Mainframe System –
·
In a mainframe
system a user sit at a terminal connected to mainframe.
·
And another user
are accessing the same computer through other terminal.
·
These user share
resources and may exchange information.
·
This type of
operating system focus on maximized resource utilization.
·
All the
resources of system like available cpu time, memory, input output (I/O) device
are use efficiently
·
NO individual
user take more resources
·
In this type of
operating system time sharing operating system are used.
·
Processor time
which is shared among multiple user or we can say the cpu time divide equal
resources.
3)
Multiprocessor System –
·
Multiprocessor
system is also known as parallel system or multicore system.
·
Such type of
system have two or more processor in close communicate and share the computer
bus, memory and peripheral (I/O)
device.
·
Multiprocessor
system is fast as compare to desktop and mainframe system.
·
Multiprocessor system
is fast appeared in servers.
·
In
multiprocessor system more than one processor are used
·
Multiprocessor
system have three main advantages –
I.
Increased
Throught- By increasing the
number of aspect to get mere work in less time using multiprocessor system.
II.
Economic Of
Scale – Multiproceassor system can cost equivalent multiple
single processor because take peripheral storage and power supply.
III.
Increased
Reliability – If function distributed properly among several
processor than the fair of one processor will not hold the system only slow it
down.
There are two type of
multiprocessor system –
A.
Asymmetric
multiprocessor system
B.
Symmetric
multiprocessor system
A.) Asymmetric multiprocessor system –
·
In asymmetric
multiprocessor system each processor assign a specific class.
·
In asymmetric
multiprocessor system the boss processor monitor all the other processor of system.
· In this system
there is boss worker relationship between processors.
A.
Symmetric multiprocessor system –
·
In symmetric
multiprocessor system each processor perform all task with in a computer
system.
·
In symmetric
multiprocessor system there is boss worker relationship between processors.
·
In symmetric
multiprocessor system each processor uses common memory where as asymmetric
multiprocessor system uses different memory.
