mainframe operating system examples

* Operating system target: 1 convenience, effectiveness, expandability, openness * Resource Manager role: 1.cpu,2 Storage Management 3I/O Management 4 file management (consider your own implementation of the file system) * Development: 1 manual Operation era, 2 online, offline I/O ERA 3 single-channel batch processing 4 multi-channel batch processing (currently

external asynchronous events within a limited period of time. Therefore, real-time systems are mainly used in time-sensitive scenarios such as process control, data collection, communication, and multimedia information processing. This article will provide an entry-level and comprehensive introduction to this operating system. The full text is divided into five chapters to show the full picture: (1) Build

int (s1)except Exception as E:5 print(e)View Code1. If you use exception uniformly, yes, you can catch all exceptions, but that means you use the same logic to handle all exceptions (the logic here is the block of code that is followed by the current expect)2. If the effect you want is that we need to customize different processing logic for different exceptions, we need to use multiple branches.' Hello ' Try : int (s1)except indexerror as E: print(e)except Keyerror as E: Pr

drives are just a medium for recording information in an electromagnetic way, and we can manage them in different formats. Different operating systems choose different formats, and the same operating system may support multiple formats. Microsoft's operating system chose th

Improve Linux operating system performance 2011-01-05 13:48 Anonymousfont Size:T | T This article explains in detail how to tune Linux system performance from disk, file and file system, memory and compilation. The tuning method provided in this article can improve the performance of Linux systems to varying degrees,

"IBM has recently negotiated with eyeos, a Web operating system manufacturer. IBM said they have noticed that eyeos has been around for a while, especially after Google Chrome OS is planned to start, their interest in eyeos has increased significantly. Starting in May next January, IBM will provide eyeos 2.0 to users who have purchased IBM's system Z

Operating System: Mainframe operating systems include: OS family, including: OS/360, OS/MFT, OS/MVT, OS/VS1, OS/vs2, MVS, OS/390, Z/OS DOS family, including: DOS/360, DOS/Vs, DOS/VSE, Z/VSE VM family, including: CP/CMS, Vm/370, Vm/XA, Vm/ESA, Z/Vm Special purpose systems, including: TPF, Z/TPF Other platf

Operating System Concepts Learning Note 9 Thread overviewA single process can include multiple control threads.Thread--a basic unit of CPU utilization, which is the basis of forming multi-threaded computer.A thread is the basic unit used by the CPU and consists of a thread ID, a program counter, a collection of registers, and a stack. It shares code snippets, data segments, and other

, including disabling all or only a specific interruption. In many operating systems, including Linux, the interrupt handler does not run in the process context, but runs in a specialInterrupt Context)Is not associated with any process. This special context is used to make the interrupt handler run faster and then exit. These contexts reflect the scope of kernel activity. In fact, in Linux, we can conclude that each processor is in one of the follow

Beginners of Unix (including Linux) are often confused and don't understand what the directory structure means. For example, there is a subdirectory/bin underneath the root directory that holds the binaries. However, the/USR subdirectory also contains/usr/bin, as well as/usr/local/bin, which is also used to store binaries, and some systems even have/opt/bin. What's the difference between them? For a long time, I have been puzzled, I do not understand why this design. Like most peop

file1.bz2: bunzip2 file1.bz2; 5. Compress and decompress while using the tar command: 1) Learn about the use of compression and decompression while using the tar command a) For example: Use the TAR command to package the Arch directory and use gzip technology to compress the packaged file (the packaged file is named arch.tar.gz): tar cvfz arch.tar.gz arch B) For example: Use the TAR command to package the Arch directory and use bzip2 technology to compress the pack

compiler to compile the program in 16-bit format #define Ycorg 7c00h//Tell the compiler to load the program at 7C00 Place #define MSGLNGTH 12//String length char msg[] = "Hello, miao!"; ASM Void Main () {MOV ax, CS mov ds, ax mov es, ax; clear screen mov ah, 06h; screen initialization or roll up of mov aL, 00h; AH = 6, AL = 0h mov bx, 01111h; Set the background color to blue mov cx, 0; The upper left corner begins: (0, 0) mov dl, 4FH; To column x mov dh, 1fh; to x line int 10h; Show interrupts;

Processes and ThreadsTwo features of the process concept:　　Resource Ownership : A process consists of a virtual address space that holds the process image (including programs, data, stacks, and process control blocks). Processes have control over and ownership of resources, including main memory, I/O channels, I/O devices and files, etc.;　　Dispatch/Execution : a process is executed along an execution path through one or more programs, and its execution may alternate with the execution of other p

linux is a unix-like computer operating system assembled under the model of free and open source software Developmentand Distribution. The defining component of Linux is the Linux kernel, andoperating system kernel were first released October 5, 1991 by Li NUS Torvalds. Itwas originally developed as a free operating

With the development of IC card from a simple synchronous card to an asynchronous card, from a simple EPROM card to the internal microprocessor-based smart card (also known as CPU card), the requirements of the IC card is more and more high. The management of the card itself is more and more complex, so there is an urgent need to have a tool to solve this contradiction, and the emergence of the internal microprocessor-enabled smart card, so that the realization of this tool has become a reality.

for the two-level page sheet, which points to the page box that contains the page you want The last in-page offset field, 0x406, is used to read the bytes in the target page box with an offset of 0x406. This is a more practical example of a 32-bit system. Seemingly more complex examples, help to understand more deeply, I hope readers can do their own calculation of the conversion process. The goal of est

Preface: I have always wanted to write a simple operating system by myself. Unfortunately, the level is limited. Compile and installProgramNot to mention studying the Linux kernel.Code. I bought a minix book and read it for half a month. I don't know how to start writing my first line of code ...... I accidentally discovered that the "write an operating

-3.1.18-1/readme You have found a new koules RPM, but you don't know what it is doing, you can type the following command: RPM-QIP koules-1.2-2.i386.rpm. Now you want to know what files are installed in the system by the Koules RPM package, you can type: RPM-QLP koules-1.2-2.i386.rpm output is: The code is as follows: /usr/man/man6/koules.6 /usr/lib/games/kouleslib/start.raw /usr/lib/games/kouleslib/end.raw /usr/lib/games/kouleslib/destroy2.raw

Php_uname () The meaning of this function is to return information about the system currently running in PHP, and the following is a detailed description of this function: /* * function: Returns information on the system currently running in PHP * @param string $mode * ' a ': returns all information * ' s ': name of the operating

CD-ROM drive is usually a portable machine representative, their weight is very light, performance is not sloppy, although the price high, but still got a lot of unbearable " Pole effect ", the pursuit of mobile strong notebook users of all ages. I have a lot of friends in the use of the notebook without optical drive, but the problem also came, need to reinstall the system, there is no optical drive, how to do? Maybe you would say that you can inst