Architecture of operating system

Architecture of operating system on kernal level.

1. Architecture of Operating System

2. An operating system is a software that : acts as an interface between the user and the computer hardware and controls the execution of all kinds of programs. performs all the basic tasks like file management, memory management, process management, handling input and output, and controlling peripheral devices such as disk drives and printers. Some popular Operating Systems are Linux, Windows, OS X, VMS, OS/400, AIX, z/OS, etc. Operating System

3. Operating System Diagram :-

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

5. A  monolithic os  is an operating system architecture where the entire operating system is working in  kernel space  and is alone in  supervisor mode . Every component of the operating system is contained in the kernel and can directly communicate with any other (i.e., simply by using function calls). The kernel typically executes with unrestricted access to the computer system. Ex:- OS/360,VMS and LINUX. Monolithic Operating System

6. As operating systems became larger and more complex, purely monolithic designs became unwieldy. The layered approach to operating systems attempts to address this issue by grouping components that perform similar functions into layers. Each layer communicates exclusively with those immediately above and below it. Lowerlevel layers provide services to higher-level ones using an interface that hides their implementation. EX :- The THE operating system is an early example of a layered operating system .Windows XP and Linux, implement some level of layering. Layered Operating System

7. In microkernel designs, most operating system components—such as process management, networking, file system interaction and device management—execute outside the kernel with a lower privilege level. Microkernels exhibit a high degree of modularity, making them extensible, portable and scalable. Further, because the microkernel does not rely on each component to execute, one or more components can fail, without causing the operating system to fail. EX :- Linux and Windows XP contain modular components. Microkernel Operating System

8. A network operating system enables its processes to access resources (e.g., files) that reside on other independent computers on a network. The structure of many networked and distributed operating systems is often based on the client/server model. The client computers in such a network request resources—such as files and processor time—via the appropriate network protocol. The servers respond with the appropriate resources. A distributed operating system is a single operating system that manages resources on more than one computer system. EX :- MIT's Chord operating system and the Amoeba operating system from the Vrije Universiteit (VU) in Amsterdam. Networked & Distributed Operating System