Os Ds Arch

Operating System Architecture and Distributed Systems

6.6 Operating System Architecture and Distributed Systems ,[object Object],[object Object],[object Object],[object Object],[object Object]

Open DS and System Software ,[object Object],[object Object],[object Object],[object Object],[object Object]

Separating Mechanisms and Policies in OS and DS ,[object Object],[object Object],[object Object],[object Object],[object Object]

OS/Kernel Architecture ,[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object]

Monolithic kernel and microkernel

Operating System Models ,[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object]

Monolithic Operating System ,[object Object],[object Object],Ex: MS-DOS Application Programs Application Programs System Services Hardware User Mode Kernel Mode

Layered OS ,[object Object],[object Object],[object Object],Application Programs System Services User Mode Kernel Mode Memory & I/O Device Mgmt Hardware Process Schedule Application Programs Ex : UNIX

Traditional OS OS Designer OS Hardware User Mode Kernel Mode Application Programs Application Programs

Disadvantages of Monolithic OS ,[object Object],[object Object],[object Object],[object Object],[object Object],[object Object]

New trend in OS design: Separating mechanisms and policies User Mode Kernel Mode Hardware Microkernel (very basic functions) Servers Application Programs Application Programs

Micro-kernel ,[object Object],[object Object],[object Object],[object Object]

Microkernel/Client Server OS ,[object Object],[object Object],[object Object],Client Application OS Emulators File Server Network Server Display Server Microkernel Hardware Send Reply Ex: Mach, PARAS, Chorus, etc. User Kernel

The role of the microkernel ,[object Object]

Few Popular Microkernel Systems ,[object Object],[object Object],[object Object],[object Object],[object Object],[object Object]

Comparison: Monolithic and Micro-kernel OS Design ,[object Object],[object Object],[object Object],[object Object],[object Object]

Hybrid Approaches ,[object Object],[object Object],[object Object]

Summary ,[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object]

Os Ds Arch

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