net ipv4

Start installing LVS1) Download the relevant software package Mkdir-p/home/tools/cd/home/tools/wget http://www.linuxvirtualserver.org/software/kernel-26/ipadm-1.26.tar.gz 2) Installing the LVS command Lsmod

Linux System Optimization Summary1) do not use root login management system, and the normal user login through sudo authorization management.For example:Useradd OldboyID Oldboyecho "Oldboy all= (All) nopasswd:all" >>/etc/sudoers2) Change the default

This article will introduce you to the common parameters in the sysctl. conf file in linux. Here we will explain each parameter in Chinese and hope to help you.   I recently found that many kernel optimization parameters cannot be remembered. I

When a site server is connected to a certain level of concurrency, you may want to consider the effect of TCP protocol settings on the HTTP server in the server system.TCP-related delays mainly include:1, the TCP connection to establish a handshake;2

#! /Bin/bash# Create lvs dr or tunl realservr scripts.# Chenjian 2011-09-23 VIP_LIST = "192.168.116.20 192.168.116.21"USAGE = "Usage: $0 {start | stop | status} {dr | tunl }"NAME = tunlNUM = 0  If [-z $1]ThenEcho $ USAGEExit 2Fi ACTION = 'echo $1 |

#! /Bin/bash # createlvsdrortunlrealservrscripts. # chenjian2011-09-23VIP_LIST & quot; 192.168.116.20192017116.21 & quot; USAGE & quot; Usage: $0 {start | stop | status} {dr | tunl} #! /Bin/bash# Create lvs dr or tunl realservr scripts.# Chenjian 201

Detailed description of the dr mode of lvs I. Environment Introduction Three virtual machines are used for lvs Server Load balancer experiments. vm01 is a server Load balancer with only one Nic. vm02 and vm03 are real web servers. vm01eth0:192.168.46

Lvs/drThe LVS-DR experimental model is as follows:650) this.width=650; "title=" Lvs-dr.png "alt=" wkiom1svy9db14msaaefpjcu-is393.jpg "src=" http://s3.51cto.com/wyfs02/ M00/57/3c/wkiom1svy9db14msaaefpjcu-is393.jpg "/>In this model, the director and

-A Hardware/kernel bits (AMD64, opterons)-at least 8GB of RAM-A recent Linux kernel (2.6.x) About tuning, I prefer to not fully disclose them because servers are targets of many attacks, so it's better not help HAC Kers. The most touchy thing is

This article uses CentOS 5.4 as an example to describe that the 5.x version should be applicable. For other versions, the command paths are different and the idea is the same.You can use the script configured after the initial installation of Linux

Nat Mode#!/bin/bash#开启director服务器上的路由转发功能:Echo 1 >/proc/sys/net/ipv4/ip_forward# Turn off ICMP redirectionecho 0 >/proc/sys/net/ipv4/conf/all/send_redirectsecho 0 >/proc/sys/net/ipv4/conf/default/send_redirectsecho 0

Linux tcp tuning parameters analysis Java code any TCP/IP tuning parameters are located in the/proc/sys/net/directory/etc/rc. local Document, and then save the document, when the system restarts, the following TCP/IP Parameter echo "1024

Cthis article mainly introduces how to install and configure lvs in centos. all of the following operations need to disable Selenge and iptables. for details, refer to CentOS. I. lvs-nat mode Network configuration:Copy codeThe code is as follows:Lvs-

theTcp / ipparameters for tweaking a linux-based machine for fast internet connections is located in/proc/sys/net/... (assuming 2.1+ kernel). This is volatile, and changes was reset at reboot. There is a couple of methods for reapplying the changes

This blog post is an early training teaching plan for linu training institutions for Old Boys. It will be shared for your reference.All the series are divided into five articles. This blog is the fifth article:5.1 cases of Kernel Parameter

Linux kernel tuning Parameters comparison and interpretationSpecific analysis of the situation, here is only to collect some of the parameters commonly used to adjust, do some simple comparison and interpretation. "NET" ######################## cat /

http://blog.csdn.net/wswifth/article/details/5102242I. PrefaceLinux source code, the implementation of the network interface is very well worth reading, through the reading source, not only the network protocol will have a deeper understanding, but

LVS Cluster has DR, TUN, Nat three configuration mode, can be the WWW service, FTP services, mail services, such as load balancing, the following through the construction of the WWW service load Balancer instance, describes the DR model based on the

Linux configuration file Optimization1. limits. how conf works limits. the conf file is actually the configuration file pam_limits.so in Linux PAM (plug-in Authentication module, Pluggable Authentication Modules), which breaks through the default

performance tuning is only necessary when adjustments are needed, and adjustments are required to compare the data collected with benchmark data. you do not need to adjust these parameters blindly. 1.TCP keepalive TCP Connection freshness