linux--nginx--Reverse Proxy Server

1. Introduction:

Nginx is a Web server that can proxy http, HTTPS, SMTP, IMPS, POP3 protocol connections, as well as a load balancer, and HTTP caching.

2. Features:

1. Nginx is a performance-oriented design of the HTTP server, compared to Apache, lighttpd, with less memory, high stability and other advantages.
2. Nginx does not adopt the design model of each client thread, but uses the asynchronous logic to reduce the context scheduling cost , so the concurrency service is more powerful .
3. Modular Design , Rich module Library and third-party module library, flexible configuration .
4. In Linux operating system, Nginx uses epool time model , because of this, nginx is very efficient under the Linux operating system ,

3, can be a large number of parallel processing:

• Nginx in the official test results, can support 50,000 parallel connections, and in the actual operation, can support 20,000 to 40,000 parallel connections .

4, Nginx Service Introduction

1. Startup script:

1#! /bin/Bash2 # Parameters3 ###################################4prefix="."5Server="${prefix}/bin/nginx"6std_log="${prefix}/logs/std.log"7err_log="${prefix}/logs/std.log.err"8Exec_user="Root"9 ####################################Ten  One if[' whoami '! =${exec_user}]; Then Aecho must use ${exec_user}! -Exit1 - fi the  -Killall-9Nginx -  -Rm-f logs/Access_log +/sbin/sysctl-w net.ipv4.tcp_timestamps=1 //the TCP timestamp (which increases by 12 bytes in the TCP header) enables the calculation of RTT (round-trip time: round-trip delay) to be enabled with a more precise method of sending timeouts (refer to RFC 1323) and this option should be enabled for better performance. 1-enabled, 0-disabled -/sbin/sysctl-w net.ipv4.tcp_tw_recycle=1  //time-wait sockets can be recycled more quickly.  +  A${server}-P ${prefix}1>>${std_log}2>>${err_log} &

The sysctl command is used to dynamically modify the kernel's operating parameters while the kernel is running, and the available kernel parameters are in directory/proc/sys. It contains advanced options for both the TCP/IP stack and the virtual memory system, which allows experienced administrators to improve compelling system performance. More than 500 system variables can be read with Sysctl.
Specific introduction See: Http://man.linuxde.net/sysctl, http://www.cnblogs.com/fczjuever/archive/2013/04/17/3026694.html

5.

linux--nginx--Reverse Proxy Server