net ipv4

Copyleft of this document belongs to yfydz and can be freely copied and reproduced when published using GPL. It is strictly prohibited to be used for any commercial purposes. MSN: yfydz_no1@hotmail.com Source: http://yfydz.cublog.cn 1. mount point (

Recently found that a lot of kernel optimization parameters can not remember, write down the article to keep in mind, easy to view later. Edit the/etc/sysctl.conf file and add the following: (with comments)#最大的待发送TCP数据缓冲区空间net.inet.tcp.sendspace=655

A Brief introductionKeepalived+lvs+mysql Primary master replication is a more common MySQL high-availability scenario where LVS provides read load balancing and keepalived failover via virtual VIP drift, while MySQL is configured as primary master

The previous article on the introduction of load Balancer LVS has explained the principle of lvs-dr, this article mainly introduces its implementation process in MySQL application:Test environment: 4 virtual machines are CENTOS6 operating systems,

Transferred from: http://blog.slogra.com/post-385.htmlToday's service site obviously too slow to check the number of server connections, tangled in how to fix time_wait# Netstat-an|awk '/tcp/{print $6} ' |sort|uniq-cClose_wait2 CLOSING136

A Brief introductionKeepalived+lvs+mysql Primary master replication is a much more frequently used MySQL high-availability scheme, in which LVS provides read load Balancing, keepalived the virtual VIP drift to achieve self-failover, while MySQL is

I will share with you the spec file of an nginx RPM package I made on Qihoo side. I will share with you the spec of common software for PHP and MySQL. When you create an RPM package, you can refer to this document. Later, some kernel-optimized

1. Install the required software package yum-yinstallgccgcc-c ++ autoconflibjpeglibjpeg-devellibpnglibpng-develfreetypefreetype-devellibxml2libxml2-develzlibzlib-develglibcglibc-develglib2glib2-develbzip2bzip2-develncursesncurses-develcurl 1.

I haven't posted any articles for a long time! Hard Disk Selection 1. Try to select a SAS disk if possible on the hard disk. If there is no bad money, you can choose SSD, funsion-io, and so on. You can also consider SATA Disks Based on the selected

  # Update OSYum Update-y # SELinuxSed-I's/SELinux = enforcing/SELinux = disabled/G'/etc/sysconfig/SELinuxSetenforce 0 # Welcome MessageEcho 'web Server'>/etc/issueEcho 'web Server'>/etc/RedHat-release # Stop iptablesService iptables

The purpose of this article is to adjust the unix ip stack to effectively prevent multiple types of attacks today. Describes the Recommended settings of network services such as HTTP or routing in Some UNIX service systems. Including the following

Lvs-tun Demo:Test environment:os:rhel6.4Director:vip:192.168.10.120dip:192.168.10.11rs1:rip:192.168.10.12rs2:rip:192.168.10.13PS: All hosts use a network card and are used Bridge network, a network card configuration multiple IP address (Lvs-tun

Before introducing how to build a web production environment, let's take a look at how to choose a system and related software, and what requirements should be met in a web production environment, then you will find your own ideas during the

Article Title: a brief explanation of linuxkernel2.4.54254socket layer. Linux is a technology channel of the IT lab in China. Includes basic categories such as desktop applications, Linux system management, kernel research, embedded systems, and

Environment: 192.168.1.8 (DR, REALSERVER) 192.168.1.88 (REALSERVER) 192.168.1.188 (REALSERVER) 1. install and configure DR: (1) install ingress sadmyuminstallipvsadm (2) bind VIP: ifconfigeth0: Ingress Environment: 192.168.1.8 (DR, real server) 192.1

Nginx command optimization (configuration file)Worker_processes 8; number of nginx processes. It is recommended to specify the number of CPUs, which is generally a multiple of them. Worker_cpu_affinity 00000001 00000010 00000100 00001000 00010000 001

Common open source software for load balancing: Nginx, LVS, keepalived Commercial hardware load devices: F5, Netscale 1. LB, LVs introduction lb cluster is a shorthand for load balance clusters, translated into Chinese is load balanced cluster 650)

PS: when the server hardware resources are rated Limited, the performance of the largest squeezing server and the concurrent processing capability of the server are improved. This is a problem that many O & M technicians think about. To improve the

You must know the tcp_keepalive settings and tcp_keepalive settings. 1. parameter settings View related parameters Sysctl-a | grep tcp_keepaliveNet. ipv4.tcp _ keepalive_intvl = 30Net. ipv4.tcp _ keepalive_probes = 2Net. ipv4.tcp _ keepalive_time = 1

Problem description:In Linux systems, the number of TCP TIME_WAIT sockets frequently reaches two or 30 thousand for High-concurrency Squid servers, and the server is easily dragged to death. Solution:By modifying linux kernel parameters, you can