Abstract View of System Components
... Time-Sharing Systems Personal-Computer Systems Parallel Systems Distributed Systems ...
... Time-Sharing Systems Personal-Computer Systems Parallel Systems Distributed Systems ...
5. Process and thread scheduling
... 5.2 Scheduling Methods – A Framework for Scheduling – Common Scheduling Algorithms – Comparison of Methods ...
... 5.2 Scheduling Methods – A Framework for Scheduling – Common Scheduling Algorithms – Comparison of Methods ...
Introduction to Distributed Systems
... user at one site may be able to use the resources available at another. Resource sharing in distributed systems provide mechanism for sharing files at remote site, processing information in a distributed database, printing files at remote sites, using specialized hardware devices (high speed array p ...
... user at one site may be able to use the resources available at another. Resource sharing in distributed systems provide mechanism for sharing files at remote site, processing information in a distributed database, printing files at remote sites, using specialized hardware devices (high speed array p ...
CHAP10
... – Assign idle processors – New arrivals may be assigned to a processor that is used by a job currently using more than one processor – Hold request until processor is available – New arrivals will be given a processor before existing running applications ...
... – Assign idle processors – New arrivals may be assigned to a processor that is used by a job currently using more than one processor – Hold request until processor is available – New arrivals will be given a processor before existing running applications ...
Lecture 1 Operating System Overview
... Resource allocation - When multiple users or multiple jobs running concurrently, resources must be allocated to each of them ...
... Resource allocation - When multiple users or multiple jobs running concurrently, resources must be allocated to each of them ...
Implementing File Systems
... decreases directory search time Some provisions must be made for collisions – situations where two file names hash to the same location Difficulties: fixed size (because it is a table) The dependence of the hash function on that size ...
... decreases directory search time Some provisions must be made for collisions – situations where two file names hash to the same location Difficulties: fixed size (because it is a table) The dependence of the hash function on that size ...
Micro-CernVM: Slashing the Cost of Building and
... sourced just before the root file system is switched and allows for custom actions. Special care has to be taken in the shutdown script of the operating system. Typically, the shutdown script does not expect an AUFS file system stack as root file system. Therefore, the script needs to be modified to ...
... sourced just before the root file system is switched and allows for custom actions. Special care has to be taken in the shutdown script of the operating system. Typically, the shutdown script does not expect an AUFS file system stack as root file system. Therefore, the script needs to be modified to ...
OS Structures and Java
... A process is a program in execution. A process needs CPU time, memory, files, and I/O devices, to accomplish its task. The operating system is responsible for Process creation and deletion (= starting and terminating a program execution) process suspension and resumption (= letting a program wai ...
... A process is a program in execution. A process needs CPU time, memory, files, and I/O devices, to accomplish its task. The operating system is responsible for Process creation and deletion (= starting and terminating a program execution) process suspension and resumption (= letting a program wai ...
![Other mainframe operating systems[edit]](http://s1.studyres.com/store/data/001334245_1-8a4e59b5aa152bc4701a5ccb54665e40-300x300.png)
Other mainframe operating systems[edit]
... More elaborate operating systems were not needed in part because most such machines were used for entertainment and education, and seldom used for more serious business or science purposes. Another reason is that the hardware they evolved on initially shipped with minimal amounts of computer memory ...
... More elaborate operating systems were not needed in part because most such machines were used for entertainment and education, and seldom used for more serious business or science purposes. Another reason is that the hardware they evolved on initially shipped with minimal amounts of computer memory ...
ITED 328 Spring 2004
... Sharing a single CPU between multiple tasks (or "threads") in a way designed to minimize the time required to switch threads. This is accomplished by sharing as much as possible of the program execution environment between the different threads so that very little state needs to be saved and restore ...
... Sharing a single CPU between multiple tasks (or "threads") in a way designed to minimize the time required to switch threads. This is accomplished by sharing as much as possible of the program execution environment between the different threads so that very little state needs to be saved and restore ...
Audit Considerations of Outsourcing
... Virtual Storage and Virtual Memory, were developed well before the Internet and not designed to mitigate the risk of hacking. RACF should be installed to provide commercial grade security for Z series servers. EECS4482 2015 ...
... Virtual Storage and Virtual Memory, were developed well before the Internet and not designed to mitigate the risk of hacking. RACF should be installed to provide commercial grade security for Z series servers. EECS4482 2015 ...
lecture10
... and described by Tanenbaum as the "Holy grail" for distributed system designers. A system's parallel execution of a task among various processes throughout the system should occur without any required user knowledge or interaction. Transparency dictates that both the need for, and the execution of p ...
... and described by Tanenbaum as the "Holy grail" for distributed system designers. A system's parallel execution of a task among various processes throughout the system should occur without any required user knowledge or interaction. Transparency dictates that both the need for, and the execution of p ...
Implementing Processes, Threads, and Resources
... • When file is opened, manager reads as many blocks ahead as feasible • After a block is logically written, it is queued for writing behind, whenever the disk is available ...
... • When file is opened, manager reads as many blocks ahead as feasible • After a block is logically written, it is queued for writing behind, whenever the disk is available ...
APT 2040: OPERATING SYSTEMS Pre
... its working. The students will also get hand-on experience and good working knowledge to work in DOS, Windows and UNIX environments. The aim is to gain proficiency in using various operating systems after undergoing this course. Course Description The course covers the concepts and architecture of a ...
... its working. The students will also get hand-on experience and good working knowledge to work in DOS, Windows and UNIX environments. The aim is to gain proficiency in using various operating systems after undergoing this course. Course Description The course covers the concepts and architecture of a ...
UNIX Operating System
... 2. Waiting (process scheduler - load from secondary storage to main memory) 3. Running (after a process is assigned a processor by a short –term scheduler, context switch is performed) 4. Blocked (waiting for resources - user input or secondary storage input. Then process is moved back to “waiting”s ...
... 2. Waiting (process scheduler - load from secondary storage to main memory) 3. Running (after a process is assigned a processor by a short –term scheduler, context switch is performed) 4. Blocked (waiting for resources - user input or secondary storage input. Then process is moved back to “waiting”s ...
Basic Concepts of Real Time Operating Systems
... It can be concluded that in real-time systems the program logic of application tasks has to be augmented by information about timing. Such timing information contains the earliest point of time the task may be started as well as the latest allowed finishing time. This, together with the program logi ...
... It can be concluded that in real-time systems the program logic of application tasks has to be augmented by information about timing. Such timing information contains the earliest point of time the task may be started as well as the latest allowed finishing time. This, together with the program logi ...
CS307-slides01
... What is an Operating System? An operating system is a program that manages the computer hardware A program that acts as an intermediary between the computer user and the ...
... What is an Operating System? An operating system is a program that manages the computer hardware A program that acts as an intermediary between the computer user and the ...
CS307-slides01
... What is an Operating System? An operating system is a program that manages the computer hardware A program that acts as an intermediary between a user of a computer and ...
... What is an Operating System? An operating system is a program that manages the computer hardware A program that acts as an intermediary between a user of a computer and ...
scheduling
... Operating system is a software which is essential for the user to interact with the computer systems. It is used to manage the software and hardware resources of the computer efficiently and coordinate the use of system components. Process: Process is defined as program in execution. It is used to a ...
... Operating system is a software which is essential for the user to interact with the computer systems. It is used to manage the software and hardware resources of the computer efficiently and coordinate the use of system components. Process: Process is defined as program in execution. It is used to a ...
System Software, Application Software and Driver Programs
... 8.1 System Software, Application Software and Driver Programs Driver Programs A small program that allows a peripheral device to communicate with the computer system Some come with the operating system while others are developed by the device manufacturers ...
... 8.1 System Software, Application Software and Driver Programs Driver Programs A small program that allows a peripheral device to communicate with the computer system Some come with the operating system while others are developed by the device manufacturers ...
Communication - Computer Science Division
... memory and may not need to context switch – Not secure: a thread can write the memory used by another thread ...
... memory and may not need to context switch – Not secure: a thread can write the memory used by another thread ...
CS9222 Advanced Operating Systems Mr.N.M. BalaMurugan
... State – Necessary and Sufficient conditions for a Deadlock – Systems with Single-Unit Requests, Consumable Resources, Reusable Resources. Objective: To teach the basic concepts, phases and types of various operation systems along with several representations, specification and Phase management. ...
... State – Necessary and Sufficient conditions for a Deadlock – Systems with Single-Unit Requests, Consumable Resources, Reusable Resources. Objective: To teach the basic concepts, phases and types of various operation systems along with several representations, specification and Phase management. ...
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 ...