briefly explain the operating system concepts relevant to distributed computing

Operating System Concepts - Chapter 21: The Linux System pot

Tài liệu THE OPERATING SYSTEM MACHINE LEVEL-6 docx

... file from one directory to anotherSetCurrentDirectory chdir Change the current working directoryFigure ... on the UltraSPARC. (a) TLB. (b) TSB. (c) Translationtable. Sector 11Sector1(a)Sector 0Read/writeheadDirectionof diskrotation12013141234567891011Sector 11Sector1(b)Sector ... 0);// Close the filesclose(infd);close(outfd);Figure 6-36. A program fragment for copying a file using the UNIX system calls. This fragment is in C because Java hides the low-level system calls...

Operating system concepts 9th edition

Danh mục: Hệ điều hành

... non-multiprogrammed system, the CPU would sitidle. In a multiprogrammed system, the operating system simply switches to, and executes, another job. When that job needs to wait, the CPU switches to another ... itsoperation. The device driver then returns control to the operating system, possibly returning the data or a pointer to the data if the operation was a read.For other operations, the device driver ... Operating- System Structures2.1 Operating- System Services 552.2 User and Operating- System Interface 582.3 System Calls 622.4 Types of System Calls 662.5 System Programs 742.6 Operating- System...

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Hardening the operating system

Danh mục: An ninh - Bảo mật

... allows the same conﬁguration to be implemented on other systems .To do this,administrators need to install Bastille on that machine, copy the conﬁg ﬁle and the BackEndﬁle to the new system s ... Conﬁguration To allow a service to run, just check and enable the service and to block, uncheck the service. If you want to add any non-standard port or a custom port to be allowed by the ﬁrewall, then ... 80)All the other services should be disabled and all other ports to be closed. When the above tasks are performed, the server becomes a specialized server to play only the desig-nated role. To harden...

Operating system concepts

Danh mục: An ninh - Bảo mật

... ofUNIX.Wealsocover the Nachos System, which allows students to get their hands dirty—totakeapart the code for an operating system, to see how it works at a low level, to build signiﬁcant pieces of the operating ... to the disk.■ On-line communication between the user and the system is provided; when the operating system finishes the execution of one command, it seeks the next “controlstatement” from the ... 20021.23 Operating System Concepts Computing Environments■ Traditional computing ■ Web-Based Computing ■ Embedded Computing Silberschatz, Galvin and Gagne 20022.7 Operating System Concepts I/O...

Deadlock Operating System Concepts

Danh mục: Cao đẳng - Đại học

... Thực thi giải thuật an to n để xác định trạng thái mới có an to n hay không và tìm thứ tự <P1, P3, P4,P0, P2> thỏa yêu cầu an to n. Chúng ta có thể cấp phát tài nguyên theo yêu cầu của tiến ... i, thì hệ thống đang ở trạng thái an to n. 3.1 Giải thuật an to n Các bước thực hiện:+ Xác định thứ tự <P0, P1, …, Pn> thỏa tiêu chuẩn an to n.3. Giải thuật Banker:+ Sử dụng ... 0 0 0P3 2 1 1 1 0 0P4 0 0 2 0 0 2Thứ tự an to n (P0,P2,P3,P1,P4) cho kết quả Finish[i] = True (với mọi i)-> Trạng thái này là an to n III.2.2.PHỤC HỒI DEADLOCKCác yếu tố xác...

OPERATING SYSTEM CONCEPTS SIXTH EDITION ABRAHAM SILBERS doc

Danh mục: Kĩ thuật Viễn thông

... index into a page directory. The entry from the page directoryselects the page table, and the page ﬁeld is an index into the page table. The entryfrom the page table, plus the offset, is the physical ... Initially set the bit to invalid. On ﬁrst reference a trap to the operating system is generated. The operating system will set a software bit to 1 and reset the valid/invalidbit to valid.10.13 ... allocated to the process. Thereis no way for a process to refer to a page it does not own because the page will not be in the page table. To allow such access, an operating system simply needs to allow...

Operating System Concepts - Appendix A: UnixBSD pdf

Danh mục: Hệ điều hành

... the starting directory:z If the first character is “/”, the starting directory is the root directoryz For any other starting character, the starting directory is the current directory The ... Galvin and Gagne â2005 Operating System Concepts 7thEdition, Feb 11, 2005 System Calls System Calls System calls define the programmer interface to UNIX  The set of systems programs commonly ... â2005 Operating System Concepts 7thEdition, Feb 11, 2005ImplementationsImplementations The user interface to the file system is simple and well defined, allowing the implementation of the...

Operating System Concepts - Appendix C: Windows 2000 doc

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... (MUP) The MUP sends the I/O request packet asynchronously to all registered redirectors A redirector that can satisfy the request responds to the MUPz To avoid asking all the redirectors the ... over the native 2000 executive services to enable 2000 to run programs developed for other operating system  2000 uses the Win32 subsystem as the main operating environment; Win32 is used to ... â2005 Operating System Concepts 7thEdition, Feb 11, 2005File System File System  The fundamental structure of the 2000 file system (NTFS) is a volumez Created by the 2000 disk administrator...

Operating System Concepts - Chapter 1: Introduction.Chapter 1: IntroductionWhat Operating Systems Do Computer-System pot

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... Handling The operating system preserves the state of the CPU by storing registers and the program counter. Determines which type of interrupt has occurred:z pollingz vectored interrupt system  ... Security Distributed Systems Special-Purpose Systems Computing Environments 1.34Silberschatz, Galvin and Gagne â2005 Operating System Concepts 7thEdition, Jan 12, 2005I/O SubsystemI/O Subsystem ... on the computer” is the kernel. Everything else is either a system program (ships with the operating system) or an application program 1.15Silberschatz, Galvin and Gagne â2005 Operating System...

Operating System Concepts - Chapter 2: Operating-System Structures doc

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... â2005 Operating System Concepts 7thEdition, Jan 14, 2005 Operating System Services Operating System Services One set of operating- system services provides functions that are helpful to the ... and Gagne â2005 Operating System Concepts 7thEdition, Jan 14, 2005Example of System CallsExample of System Calls System call sequence to copy the contents of one file to another file 2.35Silberschatz, ... Concepts 7thEdition, Jan 14, 2005 Operating System Generation Operating System Generation Operating systems are designed to run on any of a class of machines; the system must be configured for...

Operating System Concepts - Chapter 3: Processes ppt

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... â2005 Operating System Concepts - 7thEdition, Feb 7, 2006Context SwitchContext Switch When CPU switches to another process, the system must save the state of the old process and load the ... Gagne â2005 Operating System Concepts - 7thEdition, Feb 7, 2006Process ConceptProcess Concept An operating system executes a variety of programs:z Batch system – jobsz Time-shared systems ... fork system call creates new processz exec system call used after a fork to replace the process’memory space with a new program 3.9Silberschatz, Galvin and Gagne â2005 Operating System Concepts...

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Operating System Concepts - Chapter 4: Threads pot

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... â2005 Operating System Concepts 7thedition, Jan 23, 2005ManyMany-- to to--Many ModelMany Model Allows many user level threads to be mapped to many kernel threads Allows the operating ... signal appliesz Deliver the signal to every thread in the processz Deliver the signal to certain threads in the processz Assign a specific threa to receive all signals for the process 4.2Silberschatz, ... and Gagne â2005 Operating System Concepts 7thedition, Jan 23, 2005ManyMany-- to to--Many ModelMany Model 4.10Silberschatz, Galvin and Gagne â2005 Operating System Concepts 7thedition,...

Operating System Concepts - Chapter 5: CPU Scheduling pdf

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... â2005 Operating System Concepts 7thEdition, Feb 2, 2005FCFS Scheduling (Cont.)FCFS Scheduling (Cont.)Suppose that the processes arrive in the orderP2, P3, P1 The Gantt chart for the ... Yields Control to Another Thread of Equal Priority 5.16Silberschatz, Galvin and Gagne â2005 Operating System Concepts 7thEdition, Feb 2, 2005Prediction of the Length of the Next CPU BurstPrediction ... Galvin and Gagne â2005 Operating System Concepts 7thEdition, Feb 2, 2005Solaris 2 SchedulingSolaris 2 Scheduling 5.49Silberschatz, Galvin and Gagne â2005 Operating System Concepts 7thEdition,...

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Operating System Concepts - Chapter 6: Process Synchronization potx

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... mutex initialized to the value 1 Semaphore full initialized to the value 0 Semaphore empty initialized to the value N. 6.24Silberschatz, Galvin and Gagne â2005 Operating System Concepts 7thEdition, ... requires mechanisms to ensure the orderly execution of cooperating processes Suppose that we wanted to provide a solution to the consumer-producer problem that fills all the buffers. We can ... 2005Schematic view of a MonitorSchematic view of a Monitor 6.39Silberschatz, Galvin and Gagne â2005 Operating System Concepts 7thEdition, Feb 8, 2005Monitor ImplementationMonitor Implementation...