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Make the system disk "slim"-Make your system more fresh, concise, and efficient! Part 1: After installing the operating system, you must first perform the following operations. Fortunately, the following methods do not affect the stable operation of the system as long as there are no errors in the operation, so you ca
I. The concept and development of file system and database system1. File systemThe so-called file system simply says the software structure that is responsible for accessing and managing file information. For example, the computer's hard disk C, D, E, F, and movable storage devices. A file system is a method and data structure that the operating
intermediate cache and distribution role. The broker distributes and registers the consumer to the system. The role of broker is similar to caching, that is, caching between active data and offline processing systems. The communication between the client and the server is based on a simple, high-performance TCP protocol unrelated to programming languages. Several Basic concepts:Message sending process: Kafka design: 1. Throughput High throughput is
How to monitor this system resource under the Linux operating system. How do I monitor system resources? in the Windows operating system, you can query the ratio of CPU to memory consumed by each process through Task Manager. There is no such graphical management in the Linux operating
Operating system principle and Operating System ConceptOperating System PrincipleWe deal with the operating system every day. It is absolutely necessary to understand the operating system principles. It helps you understand how the operating
I transferred a new guy from the Development Department last week and asked me for an interview to see if the job is suitable for the quality department. During the conversation, the young man said that he had been admitted to the university as a system analyst, so I asked him, "What is the main role of the system analyst ?" The young man thought for a while and said, "
2. use 2.1 Function As most books sales management has similarity in the process, the system aims to reduce duplication of work, provide visual operation, and improve the correctness and efficiency of management work. Compared with the general manual data records, the use of the system to manage the book data records will greatly reduce the work time and the number of labor required, s
Linux system management commands and linux System Management System and management commands Users and Groups commandsUsersImportance: MediumDisplays all logged-on users. This command is basically the same as who-q. GroupsImportance: MediumLists the current user and the group it belongs. This is equivalent to $ GROUPS internal variable, but this command will give
, application monitoring, error alarm, bug management(3) Performance analysis, user behavior analysisSummarizeLog platform after the launch, solve a lot of original problems, it is more and more important, the future of our plans are as follows:(1) More flexible reporting. Kibana solves the underlying reporting requirements, but does not implement a logically complex report. Consider extending the Kibana to support custom charts +kibana mixed dashboard.(2) more powerful alarms. Refer to or combi
# pwd ls-a-L/ DRWXRWXRWT root root 2009-06-10 09:53 sqlite_stmt_journals DRWXRWX---system cache 2008-09-06 22:51 Cache D---rwxrwx system system 1970-01-01 SDcard lrwxrwxrwx root root 2009-06-09 22:11 etc,/system/etc Drwxr-xr-x root root 2008-09-06 22:45 system Drwxr-xr-x ro
Document directory RFs and FS Ø root file system: Root filesytem should be used in English, but sometimes it is simply called a file system. In fact, it refers to some files required for Linux system running as described in the previous section, and the entire file directory structure composed of commands. Ø File System
Linux system ArchitectureLinux systems are typically made up of 3 main parts:kernel (kernel), command interpreter (shell or other operating environment), application (application or utility)Kernel of the 1.Linux system650) this.width=650; "Src=" https://s3.51cto.com/wyfs02/M01/8F/62/wKiom1jcpALh3qY3AAKI9TKQGbk685.png-wh_500x0-wm_ 3-wmp_4-s_1441097172.png "title=" small Q-20170330141054.png "alt=" Wkiom1jcpalh3qy3aaki9tkqgbk685.png-wh_50 "/>The kernel
System Call (1), System Call ( (1): communication with the kernel The system call adds an intermediate layer between the user space and the hardware device. This layer has three main functions: 1. It provides a hardware abstract interface for the user space. 2. system calls ensure
JFS provides an overview of how to shorten the restart time of a log file system-Linux Release Technology-Debian information. For more information, see the following. In the event of a system crash, JFS provides fast file system restart. By using the database log technology, JFS can restore the file system to a consist
One of the most important decisions that embedded developers make is the type of file system to deploy. Some file system performance is relatively high, some file system space utilization ratio is high, there are some file system equipment failure or accidental power loss after the recovery of data more convenient.Linu
Linux read System Call and linuxread system call A device that simulates a USB flash drive has been created in a recent project. However, when you read the content of a virtual USB flash drive, you must read it from the disk rather than from the system cache. Due to this problem, check the information and read the system
Chapter fourth Document System 4.1 filesFrom the perspective of the 用户 study 文件 . How users use 文件 文件 them, with those features.4.1.1 File naming文件An abstraction mechanism that provides a way to keep information on disk and to read it later. Some file systems are case-sensitive, others are not. UnixIs the former, the MS-DOS latter FAT-16, FAT-32 , NTFS . FAT-16(File Allocation Table,文件配置表): Windows 95 F
Real-time operating system real-time operating system operating system, referred to as RTOS. 1. Real-time operating system definition of real-time operating system (RTOS) refers to when the external event or data generation, acceptable and fast enough to handle, the results
Different operating systems need to use different types of file systems, in order to be compatible with other operating systems to exchange data, usually the operating system can support multiple types of file systems, such as Windows Server, the system default or recommended file system is NTFS, However, it also supports FAT32 or FAT16 file systems, and DOS and
first, the Linux file structure a file structure is a method of organizing files on storage devices such as disks. Mainly embodied in the organization of files and directories. The directory provides a convenient and effective way to manage files. Linux uses a standard directory structure that, when installed, has created a file system for the user and a complete and fixed directory composition, specifying the role of each directory and the file types
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