Understanding Operating Systems,. Sixth Edition. Ann McIver McHoes and Ida M. Flynn. Executive Editor: Marie Lee. Acquisitions Editor: Amy Jollymore. operating system, the Memory Manager, Processor Manager, Device Manager, and File Understanding operating systems / Ida M. Flynn, Ann McIver McHoes. Access Understanding Operating Systems 6th Edition solutions now. Our solutions are written by Chegg experts so you can be assured of the highest quality!.

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Resources include: Hardware CPUs, memory areas, printers, tape drives, modems, and disk drives Software compilers, application programs, and data files Understanding Operating Systems, Sixth Edition Responsibilities include: Preserving space in main memory occupied by operating system Checking validity and legality of memory space request Setting up memory tracking table Tracks usage of memory by sections Needed in multiuser environment.

Two levels of responsibility: Handle jobs as they enter the system Handled by Job Scheduler. Device Management In charge of monitoring all resources Devices, channels, and control units. Choosing most efficient resource allocation method Printers, ports, disk drives, etc.

Based on scheduling policy. File Management In charge of tracking every file in the system Data files, program files, compilers, application programs.

Cooperation Issues Essential manager Perform individual tasks and Harmoniously interact with other managers Requires incredible precision. No single manager performs tasks in isolation Network manager Convenient way to share resources Controls user access. A Brief History of Machine Hardware cont'd. Computer classification By capacity and price until mids.

Understanding Operating Systems Sixth Edition

Classic Example: Minicomputer Developed for smaller institutions Compared to mainframe Smaller in size and memory capacity Cheaper. Supercomputer Massive machine Developed for military operations and weather forecasting Example: Cray supercomputer 6 to processors Performs up to 2.

Microcomputer Developed for single users in the late s Example: Very little memory by todays standards 64K maximum capacity. Workstations Most powerful microcomputers Developed for commercial, educational, and government enterprises Networked together Support engineering and technical users Massive mathematical computations Computer-aided design CAD.

Understanding Operating Systems Sixth Edition

Perform critical network task Examples: Print servers Internet servers Mail servers. Advances in computer technology Dramatic changes Physical size, cost, and memory capacity. Types of Operating Systems cont'd. Batch Systems Input relied on punched cards or tape Efficiency measured in throughput.

Interactive Systems Faster turnaround than batch systems Slower than real-time systems Introduced to provide fast turnaround when debugging programs Time-sharing software developed for operating system Understanding Operating Systems, Sixth Edition Real-time systems Reliability is key Fast and time limit sensitive Used in time-critical environments Space flights, airport traffic control, high-speed aircraft Industrial processes Sophisticated medical equipment Distribution of electricity Telephone switching.

Hybrid systems Combination of batch and interactive Accept and run batch programs in the background Interactive load is light.

Embedded systems Computers placed inside other products Adds features and capabilities Operating system requirements Perform specific set of programs Not interchangeable among systems Small kernel and flexible function capabilities Understanding Operating Systems, Sixth Edition Brief History of Operating Systems Development s: Early programs Designed to use the resources conservatively Understandability is not a priority Understanding Operating Systems, Sixth Edition Brief History of Operating Systems Development cont'd.

Two widely adopted improvements Computer operators: Records blocked before retrieval or storage Access methods developed Added to object code by linkage editor.

Understanding Operating Systems Sixth Edition

Few advances in data management Total operating system customization Suit users needs Understanding Operating Systems, Sixth Edition A number of query systems introduced Programs started using English-like words, modular structures, and standard operations Understanding Operating Systems, Sixth Edition Evolution of personal computers Evolution of high-speed communications Distributed processing and networked systems introduced Understanding Operating Systems, Sixth Edition Multimedia applications Demanding additional power, flexibility, and device compatibility for most operating systems.

Computer systems requirements Increased CPU speed High-speed network attachments Increased number and variety of storage devices. Threads Multiple actions executing simultaneously Heavyweight process conventional process Owns the resources Passive element.

Multithreaded applications programs Contain several threads running at one time Same or different priorities Examples: Object-Oriented Design Driving force in system architecture improvements Kernel operating system nucleus Resides in memory at all times, performs essential tasks, and protected by hardware. Kernel reorganization Memory resident: Advantages Modification and customization without disrupting integrity of the remainder of the system Software development more productive Understanding Operating Systems, Sixth Edition Four essential managers Work closely with the other managers and perform unique role.

Summary cont'd.

Evolution of OSs Run increasingly complex computers Run increasingly complex computer systems Prior to mids Computers classified by capacity and price.

Dramatic changes over time Moores Law: Mobile society information delivery Creates strong market for handheld devices Integral in modern computer systems Understanding Operating Systems, Sixth Edition Five categories of operating systems Batch, interactive, real-time, hybrid, and embedded.

Use of object-oriented design improves the system architecture Several ways to perform OS tasks Designer determines policies to match systems environment Next: Flag for inappropriate content. Related titles. As a Chegg Study subscriber, you can view available interactive solutions manuals for each of your classes for one low monthly price.

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Understanding Operating Systems Sixth Edition

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