What is an Operating System?
... • Distribute the computation among several physical processors. • Loosely coupled system – involves connecting 2 or more independent computer systems via communication link. So, each processor has its own O.S. and local memory; processors communicate with one another through various communications l ...
... • Distribute the computation among several physical processors. • Loosely coupled system – involves connecting 2 or more independent computer systems via communication link. So, each processor has its own O.S. and local memory; processors communicate with one another through various communications l ...
William Stallings Computer Organization and Architecture
... —Memory split into two —One for Operating System (monitor) —One for currently executing program ...
... —Memory split into two —One for Operating System (monitor) —One for currently executing program ...
![Other mainframe operating systems[edit]](http://s1.studyres.com/store/data/001334245_1-8a4e59b5aa152bc4701a5ccb54665e40-300x300.png)
Other mainframe operating systems[edit]
... Several compeditors of Digital Equipment Corporation such as Data General, Hewlett-Packard, and Computer Automationcreated their own operating systems. One such, "MAX III", was developed for Modular Computer Systems Modcomp II and Modcomp III computers. It was characterised by its target market bei ...
... Several compeditors of Digital Equipment Corporation such as Data General, Hewlett-Packard, and Computer Automationcreated their own operating systems. One such, "MAX III", was developed for Modular Computer Systems Modcomp II and Modcomp III computers. It was characterised by its target market bei ...
CS423/523
... • Print spooler, network connections, security accounts manager ... plus many others ...
... • Print spooler, network connections, security accounts manager ... plus many others ...
iMeMex: Escapes from the Personal Information Jungle (Demo Paper)
... example OS folder managed by iMeMex. The Figure provides three different views on the same folder ‘Students’. The upper-left window shows that the folder contains three files: ‘List of Students.doc’, ‘Research Topics.txt’ and ‘Thesis Topics.xls’. In addition, the ‘Students’ folder contains a subfold ...
... example OS folder managed by iMeMex. The Figure provides three different views on the same folder ‘Students’. The upper-left window shows that the folder contains three files: ‘List of Students.doc’, ‘Research Topics.txt’ and ‘Thesis Topics.xls’. In addition, the ‘Students’ folder contains a subfold ...
Operating Systems
... —Memory split into two —One for Operating System (monitor) —One for currently executing program ...
... —Memory split into two —One for Operating System (monitor) —One for currently executing program ...
AUSI-13- (Software)
... • One program may execute more than one task • Example print and edit at the same time ...
... • One program may execute more than one task • Example print and edit at the same time ...
Introduction - London South Bank University
... • An open distributed system is a system that offers services according to standard rules that describe the syntax and semantics of those services. • Openness means that the system can easily be extended and modified. • To facilitate the openness, the system should have a well defined and well-docum ...
... • An open distributed system is a system that offers services according to standard rules that describe the syntax and semantics of those services. • Openness means that the system can easily be extended and modified. • To facilitate the openness, the system should have a well defined and well-docum ...
ppt - Please enter the class page through the Blackboard website
... protection: how is one user/program protected from another? performance: how do we make it all go fast? reliability: what happens if something goes wrong (either with hardware or with a program)? extensibility: can we add new features? communication: how do programs exchange information, including a ...
... protection: how is one user/program protected from another? performance: how do we make it all go fast? reliability: what happens if something goes wrong (either with hardware or with a program)? extensibility: can we add new features? communication: how do programs exchange information, including a ...
Slide 11 : Uniprocessor Scheduling
... their complexity, their characteristic time scale, and their level of abstraction ...
... their complexity, their characteristic time scale, and their level of abstraction ...
Operating System Functions and History
... (or deliberate) alteration by a user job, but also to protect user jobs from one another. C. A key concept in multiprogrammed systems is the notions of priority and preemption to handle the commonly-occurring case where multiple jobs are able to use the CPU at the same time. 1. Different jobs could ...
... (or deliberate) alteration by a user job, but also to protect user jobs from one another. C. A key concept in multiprogrammed systems is the notions of priority and preemption to handle the commonly-occurring case where multiple jobs are able to use the CPU at the same time. 1. Different jobs could ...
ppt
... L4Linux will use a single-server approach. A single Linux server will run on top of L4, multiplexing a single thread for system calls and page faults. The Linux server maps physical memory into its address space, and acts as the pager for any user processes it creates. The Server cannot directly acc ...
... L4Linux will use a single-server approach. A single Linux server will run on top of L4, multiplexing a single thread for system calls and page faults. The Linux server maps physical memory into its address space, and acts as the pager for any user processes it creates. The Server cannot directly acc ...
Distributed File Systems
... Microsystems and Apollo Computer, and later the UNIX wars (ca 1987-1996) between AT&T and Sun on one side, and Digital Equipment, HP, and IBM on the other. During the development of the ONC protocol (called SunRPC at the time), only Apollo's Network Computing System (NCS) offered comparable function ...
... Microsystems and Apollo Computer, and later the UNIX wars (ca 1987-1996) between AT&T and Sun on one side, and Digital Equipment, HP, and IBM on the other. During the development of the ONC protocol (called SunRPC at the time), only Apollo's Network Computing System (NCS) offered comparable function ...
Final Exam - soe.ucsc.edu
... kept consistent and, in some cases, private in order to guarantee correct functioning and to protect data from other processes that must be protected. Thus the system calls allow user processes to request service from the kernel, service that it would not otherwise be allowed to do (for security rea ...
... kept consistent and, in some cases, private in order to guarantee correct functioning and to protect data from other processes that must be protected. Thus the system calls allow user processes to request service from the kernel, service that it would not otherwise be allowed to do (for security rea ...
Nachos Overview - Computer and Information Science | Brooklyn
... You are required to do this project together with your classmates, so naturally you need to consider how to share files under development among your group members. There is no single best way to do this. A possible option is to set up a user group in the Solaris system for your group, and by assigni ...
... You are required to do this project together with your classmates, so naturally you need to consider how to share files under development among your group members. There is no single best way to do this. A possible option is to set up a user group in the Solaris system for your group, and by assigni ...
The Macintosh File System (continued)
... • OS typically groups disk sectors in some logical way, creates a record of this structure, and builds a directory to track the type of data stored in each file ...
... • OS typically groups disk sectors in some logical way, creates a record of this structure, and builds a directory to track the type of data stored in each file ...
Network File System
... (4) The ability to boot VxWorks from any local SCSI device that has a dosFs file system. (5) The ability to use longer file names than the 8-character filename plus 3character extension (8.3) convention allowed by MS-DOS. ...
... (4) The ability to boot VxWorks from any local SCSI device that has a dosFs file system. (5) The ability to use longer file names than the 8-character filename plus 3character extension (8.3) convention allowed by MS-DOS. ...
What is an Operating System?
... it. So the issues of hardware protection are: I/O protection, memory protection, and CPU protection. We will discuss them one by one, but first we talk about the dual-mode operation of a CPU. a) Dual Mode Operation To ensure proper operation, we must protect the operating system and all other progra ...
... it. So the issues of hardware protection are: I/O protection, memory protection, and CPU protection. We will discuss them one by one, but first we talk about the dual-mode operation of a CPU. a) Dual Mode Operation To ensure proper operation, we must protect the operating system and all other progra ...
lecture4
... back to whatever was running before, and do the rest of the processing later (like moving the data into a buffer where its recipient process can find it and restarting the process). The activities that the kernel needs to perform in response to an interrupt are thus divided into two parts: a top h ...
... back to whatever was running before, and do the rest of the processing later (like moving the data into a buffer where its recipient process can find it and restarting the process). The activities that the kernel needs to perform in response to an interrupt are thus divided into two parts: a top h ...
Introduction to Operating Systems
... • Accepts commands from the user • Provides desired services to the user and user programs • Act as a system manager / resource manager - controls hardware and software - act as an interface between user and system • Manages resources of the computer effectively ...
... • Accepts commands from the user • Provides desired services to the user and user programs • Act as a system manager / resource manager - controls hardware and software - act as an interface between user and system • Manages resources of the computer effectively ...
Operating Systems
... • The lowest level of any operating system is its kernel. This is the first layer of software loaded into memory when a computer boots or starts up. • The kernel provides access to various common core services to all other system and application programs. • These services include, but are not limit ...
... • The lowest level of any operating system is its kernel. This is the first layer of software loaded into memory when a computer boots or starts up. • The kernel provides access to various common core services to all other system and application programs. • These services include, but are not limit ...
Operating system structures
... systems) can share the same hardware Protect from each other Some sharing of file can be permitted, controlled Commutate with each other, other physical systems via networking ...
... systems) can share the same hardware Protect from each other Some sharing of file can be permitted, controlled Commutate with each other, other physical systems via networking ...
Introduction
... Different clients may mount the servers in different places – difficult to maintain a consistent “view” of the system. ...
... Different clients may mount the servers in different places – difficult to maintain a consistent “view” of the system. ...
Best-Effort Multimedia Networking Outline
... OS as government: protecting users from each other, allocating resources efficiently and fairly, and providing secure and safe communication OS as complex system: keeping OS design and implementation as simple as possible is the key to getting the OS to work ...
... OS as government: protecting users from each other, allocating resources efficiently and fairly, and providing secure and safe communication OS as complex system: keeping OS design and implementation as simple as possible is the key to getting the OS to work ...