net ipv4

Description Operating system: CentOS 5.X 64-bit Web server: 192.168.21.127, 192.168.21.128 Sites: Bbs.111cn.net and Sns.111cn.net deployed on two Web servers To achieve the purpose: Add two servers

Tcp_connect ()--> tcp_transmit_skb () # TCP_OUTPUT.C//actually transmits TCP packets queued in by TCP_DO_SENDMS G (). --> Icsk->icsk_af_ops->queue_xmit # kernel/net/ipv4/tcp_output.c (. queue_xmit = ip_queue_xmit)--> I

Take Ip_tables.ko-dependent X_tables.ko as an example: 1, lsmod command $ lsmod Module Size Used by iptable_filter 1790 1 ip_tables 7706 1 iptable_ Filter x_tables 8327 1 ip_tables vmhgfs

Http://www.jianshu.com/p/5d82a685b5b6After a long analysis of the socket creation source, found a piece of paste, so this summary, my blog at the same time there is another detailed source analysis, the kernel version of 3.9, it is recommended that

LVS-VIP:192.168. 159.250 LVS-server:192.168. 159.91 MySQL-server:192.168. 151.150# # # #系统版本CentOS6.4#### # # #由于LVS Dr Mode based on the same network segment, mysql instance based on different network segments, so choose Tun mode, this example

Keepalived build highly available LVS Cluster 1. What is keepalived? Vro redundancy protocol (vrrp) technology can be used to achieve high lvs availability. It can also be used for lightweight software with load balancing, such as nginx and haproxy.

Build a Server Load balancer cluster with LVS in Linux Common open-source load balancing software: nginx, lvs, and keepalivedCommercial Hardware load equipment: F5, Netscale1. Introduction to LB and LVSLB clusters are short for load balance clusters.

Significance of Linux system parameters-general Linux technology-Linux programming and kernel information. The following is a detailed description. All TCP/IP optimization parameters are in the/proc/sys/net/directory. For example, the following are

HTTP Load Balancing through LVS 1. Summary This article does not consider dual-host mutual backup. Http load balancing is achieved through scripts and LVS, and clusters are used in the actual production environment. 2. Installation 1) Prepare the

Address: http://www.cnblogs.com/czh-liyu/archive/2011/11/29/2267963.html For convenience, I made another diagram based on the official schematic diagram, as shown in: VS/DR architecture: I will explain the principle of LVS-DR based on this

BKJIA exclusive Article] how to optimize your Linux production server? Based on practical experience, this article summarizes nine key points for optimizing Linux production servers. If you have not used some methods, try again. I. Time

Reference: whether http://ixdba.blog.51cto.com/2895551/708021 varnish can run stably and quickly depends heavily on Linux optimization and varnish parameter settings. After varnish installation configuration is complete, the varnish server

I. Environment Description:LVS-DR-MASTER: 10.3.0.82LVS-DR-Backup: 10.3.0.70VIP: 10.3.0.60Realserver1: 10.3.0.69Realserver1: 10.3.0.83Centos: 5.7Ii. Install the LVS and keepalvied software packages1. Download related software

NOTE: For the following content, refer to Chapter 6 of "building a high-availability Linux Server" of fuqin liquor. It is relatively simple to set up a high-availability server Load balancer environment, mainly to understand the principle. This

Build an LVS load balancing test environment There are many ways to achieve Server Load balancer: local tyrants directly F5, the best performance, the most expensive If you have no money, you can use Apache. Nginx works on the fourth layer of the

LVS's working mechanism and scheduling algorithm have been recorded in my previous articles. See hereThe working mechanism of LVS is similar to iptabls. Some work in the user space (ipvsadmin) and some work in the kernel space. user space: used to

Linux performance tuning 15th: common network parameter sorting: linux performance tuning 14th: adjusting socket buffer http://www.2cto.com/os/201307/230154.html 1. tcp connection persistence management: net. ipv4.tcp _ keepalive_time7200 if you

1. Theoretical part650) this.width=650; "src=" Http://s3.51cto.com/wyfs02/M00/74/62/wKioL1YcWESR1Un2AAEsQihvnlA995.jpg "title=" Lvs.png "alt=" Wkiol1ycwesr1un2aaesqihvnla995.jpg "/>1.1, the structure of LVSDispatch Layer (Director):Cluster layer

The official principle note: The director receives the user's request, then selects a realserver according to the load balancing algorithm, forwards the packet to the past, and finally the Realserver responds directly to the user.Instance scene

A LVS installation script, you can refer to theDescription1. Give an executable permission, run-h on the first realserver, see Help,2. Create Realserver: Run script input Realsever3. Create LVS: Run script input LVs#!/bin/bash#builed