OS Mélange

25 %
75 %
Information about OS Mélange

Published on September 23, 2007

Author: guest9006ab

Source: slideshare.net


We are all mostly familiar with just Windows, Linux, Unix (along with all the Unix derives) and Mac OS as the primary Operating Systems available. There is a whole collection of operating systems out there, ranging from the amateur hobbyist's take on conquering the OS world to full blown systems which either found a niche market or got doomed to oblivion. I shall attempt to present a small sample from this varied and interesting set.

From the Un-Distinguished Lecture Series (http://ws.cs.ubc.ca/~udls/). The talk was given Feb. 9, 2007

OS mélange    

What does an OS do ? Resource control/sharing ● Resource Policing ● Lower layer abstraction ● Mechanism Vs Policy ●    

OS Tit-bits Preemptive Multitasking vs Cooperative ● Multitasking OS API vs OS Implementation ● Microkernel Vs Monolithic Kernels ● Hardware based isolation aka Address ● spaces Posix – Portable Operating System ● Interface for Unix    

Microkernel OS Structure Severs Servers File System Drivers Kernel Hardware    

HURD Hurd' stands for `Hird of Unix-Replacing ● Daemons'. And, then, `Hird' stands for `Hurd of Interfaces Representing Depth' GNU's dream OS, started dev in 1990 ● Used the MACH microkernel ● Due to MACH's Performance woes,they ● have moved over to L4 very recently Microkernel Approach ●    

HURD HURD development never finished ● Linux became too popular, most of the ● GNU work done came to be used in the Linux Operating System. Purist insist on calling such systems GNU/ ● Linux    

L4 MACH, the pioneer of the Microkernel ● idea had miserable performance Extremely low memory footprint ● FAST ! ● Highly optimised ● Due to its small size, efforts are on to ● prove its correctness formally L4.Sec Project    

BEOS Screen shot    

BEOS Made in 1991 by BE Inc ● Initially ran on ATT hardware ● Ported to Power PC in hope Apple would ● buy them, but Apple instead went for NextStep Failed commercially ● Band of loyal supporters have tried to a ● complete re-implementation of the BEOS API in “Haiku”    

Singularity Microsoft Research project ● Radically different approach ● Software based Isolation ● Entire OS written in C#, which is a safe, ● managed language There is just one Address space, isolation ● is guaranteed by maintaining invariants in terms of “no cross references” etc    

Guess the operating system ??    

React OS – Windows Done Right Clean room re-engineering of windows ● API GPL ● Under heavy development ● Currently undergoing a phase of self audit ● to ensure complete legality    

Syllable Hobbyist OS gone big ● 99% POSIX compliant ● Only for x86 ● Incredibly responsive and fast boot up ● 8 second bootup – 2 second login –    

Future Directions Web Only operating systems ● Google OS ?? – Virtual Machine based approach ● Simulate multiple machines on your machine, – run whatever OS you fancy on each of them (Xen, VMware)    

Other Notables OS2/Warp ● FreeBsd ● Minix ●    

Images Linux Logo: http://www.linux.org/info/logos.html ● GNU Logo: http://www.gnu.org/ ● FreeBSD logo: http://en.wikipedia.org/wiki/FreeBSD ● L4 Pistachio Logo:http://l4ka.org/projects/pistachio/ ● Hurd logo: http://www.gnu.org/software/hurd/hurd.html ● Syllable logo: http://www.osnews.com/story.php?news_id=7900 ● BEOS Snapshot: http://en.wikipedia.org/wiki/BeOS ● ReactOS Snapshot: http://www.reactos.org/en/index.html ●    

Add a comment

Related pages

HOSE «TRACIE» in Grau mélange - Loungewear - Unterteile ...

Modische und bequeme Loungewear-Serie im Yoga Stil. - HOSE «TRACIE» in Grau mélange | Beldona.com
Read more

Kees Vlak – Wikipedia

Os Pàssaros do Brasil. Pássaros Coloridos; ... Wiener Mélange; French Coffee; Pause Canon; 2006 Mazury Rhapsody (A Journey to Poland) 2007 Stockholm ...
Read more

Mélange - blogspot.com

Os Mélange vão estar no Santiago Alquimista no dia 22 de abril para apresentar o seu primeiro trabalho intítulado "The Waver". posted by mélange at 6 ...
Read more


K'avas.Os Mélange des Campan und Maastrich Bentonite des Campan und MaastrichtTroulli Radiolarite and Umbra des CampaKokkinopezoula Avdhellero
Read more

Mélange d'os à mâcher Classic, 1,8 kg - e-zooo

Os pour chien ; Bâtonnets à mâcher ; Bandes à mâcher ; Biscuits ; Bonbons & récompenses ; Compléments alimentaires ; Couchage chien ; Laisse & collier ;
Read more

sac de main 101 - YouTube

Le sac de main est un jeu de jonglerie. Unique car il utilise le revers des mains pour lancer et attraper au début... mélange de aki ...
Read more

Nos Oreillers - Oreiller composé - mélange de garnissage ...

Ici les oreillers sont innovants par leurs caractéristiques étonnantes, achetez un oreiller à gel ou un oreiller à double matière, vous ne serez pas ...
Read more

Bohemian Rhapsody | Muppet Music Video | The Muppets

The Muppet’s Musical Gang is back at it with their rendition of Queen’s Bohemian Rhapsody! Subscribe for all new videos from The Muppets ...
Read more


Read more