


Blocking calls will enter the kernel and wait, and the CPU will be used by others. It is obviously not suitable for single-threaded workers. When there are more network events, everyone is waiting, and no one will use the CPU when it is idle. Naturally, the utilization rate cannot go up, let alone high concurrency.
Asynchronous non-blocking: Asynchronous non-blocking event processing mechanism, specific system calls are system calls like select/poll/epoll/kqueue.
They provide a mechanism that allows you to monitor multiple events at the same time. Calling them is blocking, but you can set a timeout. Within the timeout, if an event is ready, it will return.
tar -zxvf nginx.tar.gz
./configure
linux install gcc,gcc-c++
yum -y install gcc gcc-c++ autoconf automake
install pcre
yum -y install pcre pcre-devel
install zlib
yum - y install zlib zlib-devel
make
make install
Start the nginx server
/usr/local/nginx/sbin/nginx -c /usr/local/nginx/conf/nginx.conf
Stop the nginx server
1. Stop gracefully
kill -QUIT 15369
2. Quick stop
kill -TERM 15417
kill -INT 15417
3. Force stop
pkill -9 nginx
4. Verify the correctness of the configuration file
./nginx -t
./nginx -t -c /usr/local/nginx/conf/nginx.conf
5.nginx Restart
./nginx -s reload (enter the directory)
kill -HUP 15446
6.USR1: Switch log files
USR2: Smooth upgrade Executable process
WINCH: Shut down the working process gracefully (kill -WINCH 2255)
7. View the version
./nginx -V
#Set the user
#user nobody
#The number of work-derived processes (equal to the number of cores of the cpu or 2 times Number of cores)
worker_processes 6;
#Set the path where pid is stored
#pid logs/nginx.pid;
//Maximum number of connections
events {
worker_connections 1024;
}
#Turn on gzip (user access is compression (original 30%))
#gzip on
#Set character encoding
charset koi8-r;
charset gb2312;
nginx configuration file abstraction (instance)
user nobody;
worker_processes 4;
events{
worker_connections 1024;
}
http{
server{
listen 192.168.1.7:80;
server_name 192.168.1.7;
access_log logs/server1.access.log.combined;
location /
{
index index.html index.htm ;
root html/server1;
}
}
server{
listen 192.168.1.8:80;
server_name 192.168.1.17;
access_log logs/server2.access.log.combined;
location /
{
index index.html index.htm;
root html/server2;
}
}
}
Set the ip address and subnet mask of the host
ifconfig eth1 192.168.1.10 netmask 255.255.255.0
Set the ip address and broadcast address of the virtual host (subserver) and subnet mask
ifconfig eth1:1 192.168.1.7 broadcast 192.168.1.255 netmask 255.255.255.0
Virtual host configuration: After configuring the IP address, we need to establish contact between the corresponding IP address and the corresponding virtual host
log_format The command is used to set the recording format of the nginx server's log file.
log_format main '$remote_addr - $remote_user [$time_local] "$request" ' '"$http_user_agent" "$ http_x_forwarded_for"';
remote_addr : ip address
remote_user : user
request : requested URL
status : status
body_bytes_sent : number of bytes transferred
http_referer: original page
http_user_agent : browser (client)
http_x_forwarded_for: similar ip
//Modify nginx default configuration file
vi /usr/local/nginx/conf/nginx.conf
access_log storage path
/*****************nginx implements load balancing*************************/
user nobody;
worker_processes 4;
events{
worker_connections 1024. 0.96.12.1;
using using using using using through using ’ ’ s using ’ s ’ through ’ s ‐ ‐
listen 8080;
location /
}
}
/*****************nginx implements load balancing*************************/
The above introduces the installation and use of nginx, including nginx content. I hope it will be helpful to friends who are interested in PHP tutorials.

本篇文章给大家带来了关于nginx的相关知识,其中主要介绍了nginx拦截爬虫相关的,感兴趣的朋友下面一起来看一下吧,希望对大家有帮助。

高并发系统有三把利器:缓存、降级和限流;限流的目的是通过对并发访问/请求进行限速来保护系统,一旦达到限制速率则可以拒绝服务(定向到错误页)、排队等待(秒杀)、降级(返回兜底数据或默认数据);高并发系统常见的限流有:限制总并发数(数据库连接池)、限制瞬时并发数(如nginx的limit_conn模块,用来限制瞬时并发连接数)、限制时间窗口内的平均速率(nginx的limit_req模块,用来限制每秒的平均速率);另外还可以根据网络连接数、网络流量、cpu或内存负载等来限流。1.限流算法最简单粗暴的

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跨域是开发中经常会遇到的一个场景,也是面试中经常会讨论的一个问题。掌握常见的跨域解决方案及其背后的原理,不仅可以提高我们的开发效率,还能在面试中表现的更加

nginx部署react刷新404的解决办法:1、修改Nginx配置为“server {listen 80;server_name https://www.xxx.com;location / {root xxx;index index.html index.htm;...}”;2、刷新路由,按当前路径去nginx加载页面即可。

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linux版本:64位centos6.4nginx版本:nginx1.8.0php版本:php5.5.28&php5.4.44注意假如php5.5是主版本已经安装在/usr/local/php目录下,那么再安装其他版本的php再指定不同安装目录即可。安装php#wgethttp://cn2.php.net/get/php-5.4.44.tar.gz/from/this/mirror#tarzxvfphp-5.4.44.tar.gz#cdphp-5.4.44#./configure--pr


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