ppt - Computer and Information Science
... Tanenbaum & Bo, Modern Operating Systems:4th ed., (c) 2013 Prentice-Hall, Inc. All rights reserved. ...
... Tanenbaum & Bo, Modern Operating Systems:4th ed., (c) 2013 Prentice-Hall, Inc. All rights reserved. ...
Operating Systems File System File System File System Functions
... of E&IT, Warsaw University of Technology/* if it cannot be opened,Operating / File System – p. 6/37 out_fd = creat(argv[2], OUTPUT _MODE); /* create the destination file */ ...
... of E&IT, Warsaw University of Technology/* if it cannot be opened,Operating / File System – p. 6/37 out_fd = creat(argv[2], OUTPUT _MODE); /* create the destination file */ ...
No Slide Title
... Executive — Local Procedure Call Facility The LPC passes requests and results between client and server ...
... Executive — Local Procedure Call Facility The LPC passes requests and results between client and server ...
ch22
... Executive — Local Procedure Call Facility The LPC passes requests and results between client and server ...
... Executive — Local Procedure Call Facility The LPC passes requests and results between client and server ...
ppt
... Oses usually support both kinds, sometimes require access method declaration during create() Operating System Concepts Essentials – 8th Edition ...
... Oses usually support both kinds, sometimes require access method declaration during create() Operating System Concepts Essentials – 8th Edition ...
Chapter 9: File-System Interface
... Oses usually support both kinds, sometimes require access method declaration during create() Operating System Concepts Essentials – 8th Edition ...
... Oses usually support both kinds, sometimes require access method declaration during create() Operating System Concepts Essentials – 8th Edition ...
Text files
... Stream: an object that either delivers data to its destination (screen, file, etc.) or that takes data from a source (keyboard, file, etc.) » it acts as a buffer between the data source and destination Input stream: a stream that provides input to a program Output stream: a stream that accepts outpu ...
... Stream: an object that either delivers data to its destination (screen, file, etc.) or that takes data from a source (keyboard, file, etc.) » it acts as a buffer between the data source and destination Input stream: a stream that provides input to a program Output stream: a stream that accepts outpu ...
Chapter 2: Operating-System Structures
... Programming interface to the services provided by the OS" Typically written in a high-level language (C or C++)" Mostly accessed by programs via a high-level Application Program ...
... Programming interface to the services provided by the OS" Typically written in a high-level language (C or C++)" Mostly accessed by programs via a high-level Application Program ...
High Performance Application-Oriented Operating Systems
... The combination of scenario-independent system abstractions and scenario adapters reduces the number of components in the system abstraction repository, yields applicationready abstractions and enables the automatic generation of new abstractions. However, this is not enough to bring the process of ...
... The combination of scenario-independent system abstractions and scenario adapters reduces the number of components in the system abstraction repository, yields applicationready abstractions and enables the automatic generation of new abstractions. However, this is not enough to bring the process of ...
Best Practices for Data Sharing in a Grid Distributed
... provides no redundancy. Today, most customers are implementing RAID 5 file systems for almost everything. Dedicated hardware on the storage devices to generate RAID redundancy information (parity) has improved in performance and increased RAID 5 performance. The performance is equal to mirroring and ...
... provides no redundancy. Today, most customers are implementing RAID 5 file systems for almost everything. Dedicated hardware on the storage devices to generate RAID redundancy information (parity) has improved in performance and increased RAID 5 performance. The performance is equal to mirroring and ...
Chapter 9
... When a backslash is used in a quoted string it must be written as two backslashes since backslash is the escape character: "D:\\Work\\Java\\Programs\\FileClassDemo.java" ...
... When a backslash is used in a quoted string it must be written as two backslashes since backslash is the escape character: "D:\\Work\\Java\\Programs\\FileClassDemo.java" ...
Figure 5.01
... application may allow a program to continue running even if part of it is blocked or is performing a length operation, thereby increasing responsiveness to the user. For example, a multithreaded Web browser could allow user interaction in one thread while an image was being loaded in another thread. ...
... application may allow a program to continue running even if part of it is blocked or is performing a length operation, thereby increasing responsiveness to the user. For example, a multithreaded Web browser could allow user interaction in one thread while an image was being loaded in another thread. ...
ch21-The_Linux_System
... The environment vector is a list of “NAME=VALUE” pairs that associates named environment variables with arbitrary textual values ...
... The environment vector is a list of “NAME=VALUE” pairs that associates named environment variables with arbitrary textual values ...
PPT Chapter 13
... • Directory organized as a B+ tree • Hard links and symbolic links (called junctions) • Special techniques for sparse files and data ...
... • Directory organized as a B+ tree • Hard links and symbolic links (called junctions) • Special techniques for sparse files and data ...
Module 3: Operating
... Secondary-Storage Management Since main memory (primary storage) is volatile and too ...
... Secondary-Storage Management Since main memory (primary storage) is volatile and too ...
Reboots are for Hardware: Challenges and Solutions to
... only dynamically-updatable code. Our list included some classes that do not yet have state-transfer functions or factories, so are currently not updatable. We included these, because the addition of state-transfer functions and factories is relatively simple (the changes are confined to the class it ...
... only dynamically-updatable code. Our list included some classes that do not yet have state-transfer functions or factories, so are currently not updatable. We included these, because the addition of state-transfer functions and factories is relatively simple (the changes are confined to the class it ...
![[slides] Case study: Linux](http://s1.studyres.com/store/data/008426094_1-33a53a235a0b160ad065c81f93e7bd9c-300x300.png)
[slides] Case study: Linux
... bodies of code; the most important distinction between the kernel and all other components The kernel is responsible for maintaining the important abstractions ...
... bodies of code; the most important distinction between the kernel and all other components The kernel is responsible for maintaining the important abstractions ...
Linux system
... This single address space contains not only the core scheduling and virtual memory code but all kernel code, including all device drivers, file systems, and networking code. ...
... This single address space contains not only the core scheduling and virtual memory code but all kernel code, including all device drivers, file systems, and networking code. ...
File Systems
... • A directory maps file names (strings) to i-numbers – an i-number is a unique (within a file system) identifier for a file or directory – given an i-number, the file system can find the data and meta-data for the file • Directories provide a way for applications to group related files • Since direc ...
... • A directory maps file names (strings) to i-numbers – an i-number is a unique (within a file system) identifier for a file or directory – given an i-number, the file system can find the data and meta-data for the file • Directories provide a way for applications to group related files • Since direc ...
Characteristics of Java (Optional) Y. Daniel Liang Supplement for
... can run on any platform with a Java interpreter. The Java interpreter translates the bytecode into the machine language of the target machine. 5 Java Is Robust Robust means reliable. No programming language can ensure complete reliability. Java puts a lot of emphasis on early checking for possible ...
... can run on any platform with a Java interpreter. The Java interpreter translates the bytecode into the machine language of the target machine. 5 Java Is Robust Robust means reliable. No programming language can ensure complete reliability. Java puts a lot of emphasis on early checking for possible ...
PowerPoint XP
... One application uses only the processor One application uses only the disk drive Completion time is shorter when running ...
... One application uses only the processor One application uses only the disk drive Completion time is shorter when running ...
Appendix C - Windows 2000
... 2000 uses a client – server model like the Mach operating system, and supports distributed processing by remote procedure calls (RPCs) as defined by the Open Software Foundation. An operating system is portable if it can be moved from one hardware architecture to another with relatively few changes. ...
... 2000 uses a client – server model like the Mach operating system, and supports distributed processing by remote procedure calls (RPCs) as defined by the Open Software Foundation. An operating system is portable if it can be moved from one hardware architecture to another with relatively few changes. ...
Operating-System Structures
... Programming interface to the services provided by the OS Typically written in a high-level language (C or C++) Mostly accessed by programs via a high-level Application Program ...
... Programming interface to the services provided by the OS Typically written in a high-level language (C or C++) Mostly accessed by programs via a high-level Application Program ...
ppt
... Programming interface to the services provided by the OS Typically written in a high-level language (C or C++) ...
... Programming interface to the services provided by the OS Typically written in a high-level language (C or C++) ...
Operating Systems II
... Hardware Support for Operating Systems Recall that OS should securely multiplex resources. ⇒ we need to ensure that an application cannot: • compromise the operating system. • compromise other applications. • deny others service (e.g. abuse resources) To achieve this efficiently and flexibly, we ne ...
... Hardware Support for Operating Systems Recall that OS should securely multiplex resources. ⇒ we need to ensure that an application cannot: • compromise the operating system. • compromise other applications. • deny others service (e.g. abuse resources) To achieve this efficiently and flexibly, we ne ...
Library (computing)
In computer science, a library is a collection of non-volatile resources used by computer programs, often to develop software. These may include configuration data, documentation, help data, message templates, pre-written code and subroutines, classes, values or type specifications. In IBM's OS/360 and its successors they are referred to as partitioned data sets.In computer science, a library is a collection of implementations of behavior, written in terms of a language, that has a well-defined interface by which the behavior is invoked. This means that as long as a higher level program uses a library to make system calls, it does not need to be re-written to implement those system calls over and over again. In addition, the behavior is provided for reuse by multiple independent programs. A program invokes the library-provided behavior via a mechanism of the language. For example, in a simple imperative language such as C, the behavior in a library is invoked by using C's normal function-call. What distinguishes the call as being to a library, versus being to another function in the same program, is the way that the code is organized in the system. Library code is organized in such a way that it can be used by multiple programs that have no connection to each other, while code that is part of a program is organized to only be used within that one program. This distinction can gain a hierarchical notion when a program grows large, such as a multi-million-line program. In that case, there may be internal libraries that are reused by independent sub-portions of the large program. The distinguishing feature is that a library is organized for the purposes of being reused by independent programs or sub-programs, and the user only needs to know the interface, and not the internal details of the library.The value of a library is the reuse of the behavior. When a program invokes a library, it gains the behavior implemented inside that library without having to implement that behavior itself. Libraries encourage the sharing of code in a modular fashion, and ease the distribution of the code. The behavior implemented by a library can be connected to the invoking program at different program lifecycle phases. If the code of the library is accessed during the build of the invoking program, then the library is called a static library. An alternative is to build the executable of the invoking program and distribute that, independently from the library implementation. The library behavior is connected after the executable has been invoked to be executed, either as part of the process of starting the execution, or in the middle of execution. In this case the library is called a dynamic library. A dynamic library can be loaded and linked as part of preparing a program for execution, by the linker. Alternatively, in the middle of execution, an application may explicitly request that a module be loaded.Most compiled languages have a standard library although programmers can also create their own custom libraries. Most modern software systems provide libraries that implement the majority of system services. Such libraries have commoditized the services which a modern application requires. As such, most code used by modern applications is provided in these system libraries.