osss bksingh 14 final

8/7/2019 Osss Bksingh 14 Final

1/15

5/1/2011

1

MINIX Operating System

SCHOOL OF INFORMATION AND COMMUNICATION TECHNOLOGY

GAUTAM BUDDHA UNIVERSITY

GREATER NOIDA

2011

AA

PresentationPresentation

onon

ByByBindhyachal Kumar Singh (090202014)


2/15

Introduction to MINIX OS

y MINIX was programmed by the computer scientistAndrew Tanenbaum as a teaching operating system forx86 computer.

y It is related to the AT&T UNIX, however it does notcontain any licence requiring source code of UNIX sothat it is free of charge to be used and sold.

y In January 1987 Minix was made public for the first timeand the users discussed about it in newsgroups in theUsenet.

5/1/2011

2


3/15

Introduction to MINIX OS

y The MINIX 3 operating system is based on a

microkernel.

y Minix 3.1 was downloaded 75000 times as an ISO

image of interested users in the first 2 months after the

release.

y It has been free and open source software since it was

re-licensed under the BSD license in April 2000.

5/1/2011

3


4/15

Versions of MINIX OS

Date Versions

1984 Minix 0.?

1987 Minix 1.0

1992 Oct. Minix1.5 was installed from 12x 720 Kb floppy disks forIntel, Macintosh,Amiga, Atari or SPARC computers

1993 April Minix 1.6.25

1995 June Minix 1.7.0 with 32-bit ACK (Amsterdam Compiler Kit)

1996 Feb. Minix 1.7.2

1996 Oct. Minix 2.0.0 for Intel CPUs from 8088 up to Pentiumclass

1998 Dec. Minix 2.0.2

2005 Oct. Minix 3.1, about 300 programs available

2006 April MINIX 3.1.2

5/1/2011

4


5/15

Features of MINIX OS

POSIX compliant

Networking with TCP/IP

X Window System

Languages: Gcc, Perl, python, etc

about 650 Unix programs

5/1/2011

5


6/15

Features of MINIX OS

Full multiuser and multiprogramming

Device drivers run as user processes

High degree of fault tolerance

Full C source code supplied

Extremely small, with the part that runs in kernel mode under

4000 lines of executable code.

5/1/2011

6


7/15

Targeted Areas

MINIX 3 is initially targeted at the following areas:

y Applications where very high reliability is required

y Single-chip, small-RAM, low-power.

y Embedded systems

y Applications where the GPL is too restrictive

y Education

5/1/2011

7


8/15

Components of MINIX OS File System

y Boot Block

y Superblock.

y

Inode bitmap

y zone bitmap

y Inodes area

y Data area

5/1/2011

8


9/15

API in MINIX OS

y The Kernel

The kernel offers an API that is used by the drivers and servers for

obtaining kernel services.

y Device Drivers

Drivers have three APIs: with the kernel, the file server, and the

reincarnation server

API Service provider Service User

Kernel calls Kernel Device drivers

Driver calls Driver File server

Reincarnation Driver Reincarnation server

5/1/2011

9


10/15

API in MINIX OS

y Servers

The servers are called by user programs to obtain POSIX services.

API Service provider Service User

Kernel calls Kernel Server

Driver calls Driver File server

Reincarnation Server Reincarnation server

POSIX Server User programs

5/1/2011

10


11/15

The MINIX 3 architecture

5/1/2011

11


12/15

Advantages of MINIX OS

y Open Source

y Low Cost

y Security

y Multitasking

y Flexibility

5/1/2011

12


13/15

Advantages of MINIX OS

5/1/2011

13

y NetworkFriendliness

y Stability

y Low Hardware Requirements


14/15

References

y http://www.minix3.org/

y http://en.wikipedia.org/wiki/MINIX

y http://www.osnews.com/story/15960/Introduction-to-MINIX-3/

5/1/2011

14


15/15

Thank You

5/1/2011

15

osss bksingh 14 final

Documents