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common server, CFQ is a good choice.For the use of which scheduling algorithm, or according to the specific business scenario to do the foot benchmark to choose, can not rely on other people's text to decide.5. Change the IO scheduling algorithmIn Rhel5/oel5 and later versions (such as RHEL6 and RHEL7), I/O Scheduler can be set for each disk, and the modifications will take effect immediately, such as:$ cat/sys/block/sda1/queue/'cfq'>/sys/block/sda1/queue//sys/ block/sda1/queue/Schedulernoop an

source code online1.25 http://www.linux.orgLinux Information Resources1.26 http://www.linuxdevices.comEmbedded Linux Information Resources1.27 http://www.linuxjournal.com/webindex.phpLinux journal Magazine online articles1.28 http://www.joyfire.net/This site is maintained by joyfire1.29 http://lwn.netLinux weekly news1.30 http://www.ctyme.com/intr/int.htmBios System calls are comprehensive2. project resour

Tags: System ops LinuxBasic knowledge of computer playing:CPU (operator, Controller), memory, I/O (input device, output device)程序运行模式： 用户空间：user space,us （可执行普通指令） 内核空间：system space （可执行特权指令）POS：Postable Operating System 可移植操作系统 POSIX 可移植操作系统规范运行程序格式：Windows：EXE，库文件dll（dynamic link library 动态链接库）Linux：ELF，库文件so（shared object 共享对象）程序：指令+数据 指令：只读 数据：读写程序：算法+数据结构库调用，系统调用：允许被调用的程序；malloc() 申请内存空间；free() 释放内存空间；编程语言 汇编语言：微码编程（系统级程序员） 系统中某些于硬件相关的特有代码、驱动程序开发； 高级语言：C、C++

LAMP (Linux + Apache + MySQL + PHP) has developed rapidly in recent years and has become a de facto standard for Web servers. The term LAMP first came from the German Magazine "c't Magazine". In 1990, Michael Kunze first combined these projects to create the abbreviation of LAMP. Although these components are not designed for use at the beginning, these open-sour

version 2.4 in various multi-processor systems. "Linux kernel 2.6: The Future of embedded computing" (Linux Journal, November March 2004) briefly introduced some important features of kernel 2.6, including the scheduler and its impact on embedded systems. "Kernel comparison: improvements in kernel development from 2.4 to 2.6" (developerworks, November February 2004) introduced tools, tests, and technolog

At present, lamp (Linux + Apache + MySQL + PHP) has developed rapidly in recent years, has become the fact of the Web server standards. The word lamp originated in the German magazine "C ' t Magazine", and Michael Kunze first assembled the items together in 1990 to create lamp abbreviations. These components are not designed to be used together, but they can be

This series of articles summarizes Linux network stacks, including:(1) Linux Network protocol Stack Summary(2) Network multipart offload technology Gso/tso/ufo/lro/gro in non-virtualized Linux environment(3) QEMU/KVM Network multipart offload technology in virtualized Linux environment Gso/tso/ufo/lro/gro1.

1, what is Linux? To be exact, the Linux kernel (the core program of the system), whose kernel copyright belongs to Linus Torvalds, is issued under the GPL (GNU general public License) Copyright Agreement, and anyone can copy (copy) and modify ( Change), package distribution (distribute), sales, but can not add any restrictions at the time of distribution, and all the original code must be public, so anyone

Do you want to make a living in Linux? -- Linux general technology-Linux technology and application information. For details, refer to the following section. Chinese translation. What about Linux? So, this can be done, but it is not easy. Linux continues to become increasin

as follows: 1) VI mytask.sh Enter the following command Date>>/home/mydate3 Cp/home/mydate3/root 2) Grant mytask.sh Execute permission chmod 744 MYTASK.S H 3) Crontab-e 4) Re-enter the command: * * * * * */root/mytask.sh. (3) How to terminate a task crontab-r means to terminate a task schedule. After the command is executed, the tasks in the crontab-e are removed. CRONTAB-L indicates which task schedules are currently in the list.2, the Linux proces

changing the compilation options, I can run it under WIN 98, win 2 K, and Win XP. Very convenient. If you change to Linux, you have to pray that the header files and function interfaces that you use are not modified between different kernel versions. Otherwise, you have to change the code. At the same time, the advantage of open source is that it is suitable for learning and flexible. I think Linux is very

, compatibility is good, I used to write a driver in WDM, up to the compiler option can be in Win 98, Win 2K, Win XP run. Very convenient. And if you switch to Linux, you have to pray that the different kernel versions do not change between the header files you use, the function interfaces. Otherwise it's going to change the code.At the same time, the benefits of open source are suitable for learning, very flexible. I think

kernel Documentation1.17 http://linux-mm.org/Linux kernel mm documentation1.18 Http://www.linuxforum.netChina Linux Forum1.19 http://www.aka.org.cnChina Information Technology Forum-AKA1.20 http://www.lisoleg.netAgile feet (Linux Source Learning Group)1.21 http://www.linuxfans.org/China

HTTP://WWW.IBM.COM/DEVELOPERWORKS/CN/LINUX/L-LSM/PART1/1. Related background: Why and whatIn recent years, Linux system has been widely concerned and applied by computer industry because of its excellent performance and stability, the flexibility and expansibility of open Source feature, and the lower cost. But in terms of security, the Linux kernel only provides

Deploy War packages for Linux tomcat, deploy JavaWeb projects for Linux Tomcat, deploy War packages for Linux, and deploy tomcatjavaweb Deploy the War package for Linux tomcat, deploy the JavaWeb project for Linux Tomcat, and deploy the War package for

Create a small Linux with network functions First, copy the required basic network commands to a Linux instance.Copy Ping and ifconfigTo add a network function, you must be driven by the NIC. The NIC Driver is pcnet32.However, pcnet32 has a dependency module that is MII, and MII has no dependency module,So we only need to copy the two modules to ourIn Linux, chec

Never use Linux commands! | Linux China, linux ChinaYou only need a stupid move. You can even destroy a company worth billions of dollars, Just Like Apache Struts without patching. -- Steven Vaughan-Nicolas In this article, navigate to rm-rf/11% faster fork bomb 39% faster junk data rewrite hard disk 47% faster erase hard disk! 54% Bytes/dev/null loss 63% bytes f

, and common tools involved in the Linux program design process, so that you can better understand: 'as a modern Linux programmer, what exactly do you need. '" In addition, this book also provides an in-depth explanation of the knowledge about Linux kernel development.Linux magazineWhat does a magazine say. "This book

RCU is a Linux system read-write synchronization mechanism, in the final analysis he is also a kind of kernel synchronization means, this question on the RCU probability and implementation mechanism, give the author's understanding."Rcu probability"Let's look at the definition of RCU in the kernel document:RCU is a synchronization mechanism this was added to the Linux kernel during the 2.5 development effor

Label:First, Introduction What is lamp Lamp is a Web network application and development environment, is the abbreviation of Linux, Apache, MySQL, Php/perl, each letter represents a component, each component in itself is a very powerful component in the aspect it represents. The origin of the word lamp originated in the German magazine "C ' t Magazine", where Mi