Distributed File Systems
... Files that are to be granted read access to any user, including the owner, need to have the standard UNIX "owner read" permission set Allows users to modify files in a directory Files that are to be granted write access to any user, including the owner, need to have the standard UNIX "owner write" p ...
... Files that are to be granted read access to any user, including the owner, need to have the standard UNIX "owner read" permission set Allows users to modify files in a directory Files that are to be granted write access to any user, including the owner, need to have the standard UNIX "owner write" p ...
Slide 1
... • In Windows a process consists of program code, execution context ( the address space of the process plus such things as the access token) resources allocated to the process i.e. handles, one or more threads • Threads are the units of execution – they execute program code using the processes ...
... • In Windows a process consists of program code, execution context ( the address space of the process plus such things as the access token) resources allocated to the process i.e. handles, one or more threads • Threads are the units of execution – they execute program code using the processes ...
Lecture #19: Storage Management
... A transaction is considered committed once it is written to the log ...
... A transaction is considered committed once it is written to the log ...
Introduction to Operating System PCSC
... Instructions and data must be loaded into main memory, I/O devices and files must be initialized, and other resources must be prepared. The OS handles these scheduling duties for the user. • Access to I/O devices: Each I/O device requires its own peculiar set of instructions or control signals for o ...
... Instructions and data must be loaded into main memory, I/O devices and files must be initialized, and other resources must be prepared. The OS handles these scheduling duties for the user. • Access to I/O devices: Each I/O device requires its own peculiar set of instructions or control signals for o ...
Operating Systems
... 1. protect applications from each other, yet 2. share physical resources between them. • Also usually want to abstract away from grungy harware, i.e. OS provides a virtual machine: – share CPU (in time) and provide each app with a virtual processor, – allocate and protect memory, and provide applica ...
... 1. protect applications from each other, yet 2. share physical resources between them. • Also usually want to abstract away from grungy harware, i.e. OS provides a virtual machine: – share CPU (in time) and provide each app with a virtual processor, – allocate and protect memory, and provide applica ...
Plan 9 from Bell Labs
... which files those names represent depends on circumstances such as the architecture of the machine executing date. Plan 9, then, has local name spaces that obey globally understood conventions; it is the conventions that guarantee sane behavior in the pres ence of local names. The 9P protocol is st ...
... which files those names represent depends on circumstances such as the architecture of the machine executing date. Plan 9, then, has local name spaces that obey globally understood conventions; it is the conventions that guarantee sane behavior in the pres ence of local names. The 9P protocol is st ...
15.a The Internal Operating System
... process management Substantially less information than a normal PCB Chapter 15 The Internal Operating System – Part 1 ...
... process management Substantially less information than a normal PCB Chapter 15 The Internal Operating System – Part 1 ...
EMERALDS-OSEK: A Small Real-Time Operating System for
... interrupts). So, if there are N tasks in the system, the total stack space reserved for ISRs will be Nb bytes which is (N-1)b bytes more than what’s needed if an interrupt stack is available. Unfortunately, the SH-2 microprocessor does not have hardware support for an interrupt stack. At the same ti ...
... interrupts). So, if there are N tasks in the system, the total stack space reserved for ISRs will be Nb bytes which is (N-1)b bytes more than what’s needed if an interrupt stack is available. Unfortunately, the SH-2 microprocessor does not have hardware support for an interrupt stack. At the same ti ...
Document
... on IBM microcomputers (PCs) and their clones. When IBM introduced their PC to the market in the early 1980s, many of their competitors in effect copied the machine producing IBM compatibles or clones. Their competitors then acquired the same operating system for the clones, from a company called Mic ...
... on IBM microcomputers (PCs) and their clones. When IBM introduced their PC to the market in the early 1980s, many of their competitors in effect copied the machine producing IBM compatibles or clones. Their competitors then acquired the same operating system for the clones, from a company called Mic ...
Lecture #2
... One purpose of OS is to hide peculiarities of hardware devices from the user I/O subsystem responsible for ...
... One purpose of OS is to hide peculiarities of hardware devices from the user I/O subsystem responsible for ...
ppt - Please enter the class page through the Blackboard website
... sharing: how are resources shared across users? naming: how are resources named (by users or programs)? security: how is the integrity of the OS and its resources ensured? protection: how is one user/program protected from another? performance: how do we make it all go fast? reliability: what happen ...
... sharing: how are resources shared across users? naming: how are resources named (by users or programs)? security: how is the integrity of the OS and its resources ensured? protection: how is one user/program protected from another? performance: how do we make it all go fast? reliability: what happen ...
COS 318: Operating Systems Processes and Threads Kai Li and Andy Bavier
... Example: many users can run the same program • Each process has its own address space, i.e., even though program has single set of variable names, each process will have different values ...
... Example: many users can run the same program • Each process has its own address space, i.e., even though program has single set of variable names, each process will have different values ...
Operating system
... 1. Hardware – provides basic computing resources (CPU, memory, I/O devices). 2. Operating system – controls and coordinates the use of the hardware among the various application programs for the various users. 3. Applications programs – define the ways in which the system resources are used to solve ...
... 1. Hardware – provides basic computing resources (CPU, memory, I/O devices). 2. Operating system – controls and coordinates the use of the hardware among the various application programs for the various users. 3. Applications programs – define the ways in which the system resources are used to solve ...
PPT slides - SIUE Computer Science
... CS 314 Operating Systems Operating systems as resource manager (continued) In the previous example, we discussed process management as an example of resource management, similar (but different) resource management is performed for every and each resource available in a computer system Examples • Me ...
... CS 314 Operating Systems Operating systems as resource manager (continued) In the previous example, we discussed process management as an example of resource management, similar (but different) resource management is performed for every and each resource available in a computer system Examples • Me ...
File-System
... create a network login. A newer version is called active directory. One distributed LDAP (lightweight directory-access protocol) could be used by an organization to store all user and resource information for all organization’s computers. The result is secure single sign-on for users. Skip 10.5.2. ...
... create a network login. A newer version is called active directory. One distributed LDAP (lightweight directory-access protocol) could be used by an organization to store all user and resource information for all organization’s computers. The result is secure single sign-on for users. Skip 10.5.2. ...
Chapter 3 System Software Objectives: In this chapter we will
... and demand memory, storage and input/output (I/O) bandwidth for their own purposes. In this capacity, the operating system plays the role of the good parent, making sure that each application gets the necessary resources while playing nicely with all the other applications, as well as husbanding the ...
... and demand memory, storage and input/output (I/O) bandwidth for their own purposes. In this capacity, the operating system plays the role of the good parent, making sure that each application gets the necessary resources while playing nicely with all the other applications, as well as husbanding the ...
RTOS Acceleration by Reducing Overhead due to Context
... To access these register files two new instructions (scxt, rcxt) are introduced in to the existing instruction set, so as to make the process much quicker.The index will be stored in CPU temporary register and this register will be used as operand for these instructions. B. Software Approach The sof ...
... To access these register files two new instructions (scxt, rcxt) are introduced in to the existing instruction set, so as to make the process much quicker.The index will be stored in CPU temporary register and this register will be used as operand for these instructions. B. Software Approach The sof ...
Master boot record
... Separation of the operating system (OS) and program files from user files. This allows image backups (or clones) to be made of only the operating system and installed software. Having a separate area for operating system virtual memory swapping/paging. Keeping frequently used programs and data near ...
... Separation of the operating system (OS) and program files from user files. This allows image backups (or clones) to be made of only the operating system and installed software. Having a separate area for operating system virtual memory swapping/paging. Keeping frequently used programs and data near ...
Protection A computer system is a collection of processes and
... no protection mechanism implemented in unix, then every student can read/write the files/data of others. 2. Consider a unix-like system where theres a root or the super user. Now, if theres no proper protection mechanism, then any process could acquire root privileges and thereby could cause damage. ...
... no protection mechanism implemented in unix, then every student can read/write the files/data of others. 2. Consider a unix-like system where theres a root or the super user. Now, if theres no proper protection mechanism, then any process could acquire root privileges and thereby could cause damage. ...
Course Intro
... An operating system manages all peripheral devices, network interfaces, other program resources and users of such. In short, an OS is a complex program system. The study of operating systems has gained importance with the advancements made in computer organization and programming systems. This cours ...
... An operating system manages all peripheral devices, network interfaces, other program resources and users of such. In short, an OS is a complex program system. The study of operating systems has gained importance with the advancements made in computer organization and programming systems. This cours ...
Module 4: Processes
... Extensibility (Can easily add new functions--user processes) Flexibility (Can remove functions that are not needed) Portability (Only the small kernel has hardware specific code) Distributed System support (Message passing can generalize to network communications) Object oriented (A good d ...
... Extensibility (Can easily add new functions--user processes) Flexibility (Can remove functions that are not needed) Portability (Only the small kernel has hardware specific code) Distributed System support (Message passing can generalize to network communications) Object oriented (A good d ...
Operating Systems and File Management 4 Operating System
... An operating system is a type of system software that acts as the master controller for all activities that take place within a computer system ...
... An operating system is a type of system software that acts as the master controller for all activities that take place within a computer system ...
Operating systems
... and printers. For large systems, the operating system has even greater responsibilities and powers. It is like a traffic cop – it makes sure that different programs and users running at the same time do not interfere with each other. The operating system is also responsible for security, ensuring th ...
... and printers. For large systems, the operating system has even greater responsibilities and powers. It is like a traffic cop – it makes sure that different programs and users running at the same time do not interfere with each other. The operating system is also responsible for security, ensuring th ...
OperatingSystems-Lecture12
... This couldn’t have happened if transactions are executed one after the other The same situation may happen within the OS, for example, a message may be lost instead of an update ...
... This couldn’t have happened if transactions are executed one after the other The same situation may happen within the OS, for example, a message may be lost instead of an update ...
Chapter 2
... The RAM address space is shared; No memory protection from each other The stacks of each thread are intended to be in separate RAM, but if one thread has a problem (e.g., with pointers or array addressing), it could write over the stack of another thread ...
... The RAM address space is shared; No memory protection from each other The stacks of each thread are intended to be in separate RAM, but if one thread has a problem (e.g., with pointers or array addressing), it could write over the stack of another thread ...