Operating system architecture

A short explanation of Architecture of operating system. In this slide i explain about monolithic OS , layer OS, microkernel OS and networked and distributed OS with their architecture.

1. OPERATING SYSTEM ARCHITECTUR E Prepared by: Sabin Dumre ACE074BCT058

2. A n  Operating System (OS) is a software that acts as an interface between computer hardware components and the user . Controls the execution of all kind of program. To communicate with the computer without knowing the computer language . Performs all the basic tasks like file management , memory management, process management, handling input and output and controlling peripheral devices like printers and drives . Popular Operating system are linux , windows, ios , Android etc …

3. Architecture of operating system

4. Architecture of operating system Monolithic Operating System Layered Operating System Microkernel Operating system Networked and Distributed Operating System

5. Monolithic Operating System In early monolithic systems, each component of the operating system was contained within the kernel. could communicate directly with any other component, and had unrestricted system access .   The  Monolithic application describes a single-tiered  software application in which different components combined into a single program from a single platform.

6. Layered Operating System Layered Structure is a type of system structure in which the different services of the  operating system are split into various layers, where each layer has a specific well-defined task to perform . It was created to improve the pre-existing structures like the Monolithic structure and the Simple structure. The outermost layer must be the User Interface layer . The innermost layer must be the Hardware layer.

7. A particular layer can access all the layers present below it but it cannot access the layers present above it. That is layer n-1 can access all the layers from n-2 to 0 but it cannot access the nth layer . Thus if the user layer wants to interact with the hardware layer, the response will be traveled through all the layers from n-1 to 1. Each layer must be designed and implemented such that it will need only the services provided by the layers below it. Advantages Easy to implement Easy to debug Disadvantages Designing layers structure Not very efficient

8. Microkernel Operating system   In a microkernel operating system, the kernel is small and only contains memory management, inter-process communication and CPU scheduling . Microkernels are highly modular, making them extensible, portable and scalable . If any module falls others are unaffected Interaction between funcation is slower. Adding new source is very simple Easy to manage and debug.

9. Networked and Distributed Operating System Networked Operating System   In  network operating system each node or system can have its own operating system Communication takes place on the basis of files . fault tolerance is less . Ease implementation Network OS provides local services to remote clients. Distributed Operating System E ach node or system have same operating system which is opposite to the network operating system . Communication takes place on the basis of messages and shared memory . fault tolerance is high . Quite difficult to implementation Distributed OS manages the hardware resources.

10. Networked Operating System Distributed Operating System