briefly explain the operating system concepts relevant to distributed computing
Tài liệu THE OPERATING SYSTEM MACHINE LEVEL-6 docx
Ngày tải lên :
12/12/2013, 09:15
... file from one directory to another
SetCurrentDirectory chdir Change the current working directory
Figure ... on the UltraSPARC. (a) TLB. (b) TSB. (c) Translation
table.
Sector 11
Sector
1
(a)
Sector 0
Read/
write
head
Direction
of disk
rotation
1
2
0
1
3
1
4
1
2
3
4
5
6
7
8
9
1
0
1
1
Sector 11
Sector
1
(b)
Sector ... 0);
// Close the files
close(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...
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Operating system concepts 9th edition
Ngày tải lên :
16/02/2014, 22:58
... non-multiprogrammed system, the CPU would sit
idle. 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 ... its
operation. 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 Structures
2.1 Operating- System Services 55
2.2 User and Operating- System
Interface 58
2.3 System Calls 62
2.4 Types of System Calls 66
2.5 System Programs 74
2.6 Operating- System...
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Hardening the operating system
Ngày tải lên :
19/03/2014, 13:35
... 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 BackEnd
file 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...
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Operating system concepts
Ngày tải lên :
19/03/2014, 13:41
... of
UNIX.Wealsocover
the Nachos System, which allows students to get their hands dirty—totake
apart 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 “control
statement” from the ... 2002
1.23
Operating System Concepts
Computing Environments
■ Traditional computing
■ Web-Based Computing
■ Embedded Computing
Silberschatz, Galvin and Gagne 2002
2.7
Operating System Concepts
I/O...
- 978
- 632
- 0
Deadlock Operating System Concepts
Ngày tải lên :
13/05/2014, 00:27
... 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 <P
0
, P
1
, …, P
n
> thỏa tiêu chuẩn an to n.
3. Giải thuật Banker:
+ Sử dụng ... 0 0 0
P3 2 1 1 1 0 0
P4 0 0 2 0 0 2
Thứ tự an to n (P
0
,P
2
,P
3
,P
1
,P
4
) cho kết quả Finish[i] = True (với mọi i)
-> Trạng thái này là an to n
III.2.2.PHỤC HỒI DEADLOCK
Các yếu tố xác...
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OPERATING SYSTEM CONCEPTS SIXTH EDITION ABRAHAM SILBERS doc
Ngày tải lên :
28/06/2014, 00:20
... index into a page directory. The entry from the page directory
selects the page table, and the page field is an index into the page table. The entry
from 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/invalid
bit to valid.
10.13 ... allocated to the process. There
is 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...
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- 2
Operating System Concepts - Appendix A: UnixBSD pdf
Ngày tải lên :
28/06/2014, 02:20
... the starting directory:
z If the first character is “/”, the starting directory is the root
directory
z For any other starting character, the starting directory is the
current directory
The ... Galvin and Gagne â2005
Operating System Concepts 7
th
Edition, 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 7
th
Edition, Feb 11, 2005
Implementations
Implementations
The user interface to the file system is simple and well defined,
allowing the implementation of the...
- 64
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- 0
Operating System Concepts - Appendix C: Windows 2000 doc
Ngày tải lên :
28/06/2014, 02:20
... (MUP)
The MUP sends the I/O request packet asynchronously to all
registered redirectors
A redirector that can satisfy the request responds to the MUP
z 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 7
th
Edition, Feb 11, 2005
File System
File System
The fundamental structure of the 2000 file system (NTFS) is a
volume
z Created by the 2000 disk administrator...
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Operating System Concepts - Chapter 1: Introduction.Chapter 1: IntroductionWhat Operating Systems Do Computer-System pot
Ngày tải lên :
28/06/2014, 02:20
... 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 polling
z vectored interrupt system
... Security
Distributed Systems
Special-Purpose Systems
Computing Environments
1.34
Silberschatz, Galvin and Gagne â2005
Operating System Concepts 7
th
Edition, Jan 12, 2005
I/O Subsystem
I/O Subsystem
... on the computer” is the
kernel. Everything else is either a system program (ships with
the operating system) or an application program
1.15
Silberschatz, Galvin and Gagne â2005
Operating System...
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Operating System Concepts - Chapter 2: Operating-System Structures doc
Ngày tải lên :
28/06/2014, 02:20
... â2005
Operating System Concepts 7
th
Edition, 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 7
th
Edition, Jan 14, 2005
Example of System Calls
Example of System Calls
System call sequence to copy the contents of one file to another file
2.35
Silberschatz, ... Concepts 7
th
Edition, 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...
- 44
- 560
- 0
Operating System Concepts - Chapter 3: Processes ppt
Ngày tải lên :
28/06/2014, 02:20
... â2005
Operating System Concepts - 7
th
Edition, Feb 7, 2006
Context Switch
Context 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 - 7
th
Edition, Feb 7, 2006
Process Concept
Process Concept
An operating system executes a variety of programs:
z Batch system – jobs
z Time-shared systems ... fork system call creates new process
z exec system call used after a fork to replace the process’
memory space with a new program
3.9
Silberschatz, 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 7
th
edition, Jan 23, 2005
Many
Many
-
-
to
to
-
-
Many Model
Many Model
Allows many user level threads to be mapped to many kernel
threads
Allows the operating ... signal applies
z Deliver the signal to every thread in the process
z Deliver the signal to certain threads in the process
z Assign a specific threa to receive all signals for the process
4.2
Silberschatz, ... and Gagne â2005
Operating System Concepts 7
th
edition, Jan 23, 2005
Many
Many
-
-
to
to
-
-
Many Model
Many Model
4.10
Silberschatz, Galvin and Gagne â2005
Operating System Concepts 7
th
edition,...
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- 0
Operating System Concepts - Chapter 5: CPU Scheduling pdf
Ngày tải lên :
28/06/2014, 02:20
... â2005
Operating System Concepts 7
th
Edition, Feb 2, 2005
FCFS Scheduling (Cont.)
FCFS Scheduling (Cont.)
Suppose that the processes arrive in the order
P
2
, P
3
, P
1
The Gantt chart for the ... Yields Control to Another Thread of Equal Priority
5.16
Silberschatz, Galvin and Gagne â2005
Operating System Concepts 7
th
Edition, Feb 2, 2005
Prediction of the Length of the Next CPU Burst
Prediction ... Galvin and Gagne â2005
Operating System Concepts 7
th
Edition, Feb 2, 2005
Solaris 2 Scheduling
Solaris 2 Scheduling
5.49
Silberschatz, Galvin and Gagne â2005
Operating System Concepts 7
th
Edition,...
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Operating System Concepts - Chapter 6: Process Synchronization potx
Ngày tải lên :
28/06/2014, 02:20
... mutex initialized to the value 1
Semaphore full initialized to the value 0
Semaphore empty initialized to the value N.
6.24
Silberschatz, Galvin and Gagne â2005
Operating System Concepts 7
th
Edition, ... 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 ... 2005
Schematic view of a Monitor
Schematic view of a Monitor
6.39
Silberschatz, Galvin and Gagne â2005
Operating System Concepts 7
th
Edition, Feb 8, 2005
Monitor Implementation
Monitor Implementation
...
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