How to install redis extension in liunx php

Liunx PHP installation redis extension method: 1. Check the redis version; 2. Download the installation package through the wget command and decompress the installation package through "tar zxf"; 3. Execute "cd redis-4.0.8/src make" to install redis.

The operating environment of this tutorial: linux5.9.8 system, redis version 4.0.8, DELL G3 computer

linux installation redis

#linux Installing redis is very simple and is introduced on the official website.

Install redis:

1. First check the redis version and find the version you want to download: https://www. php.cn/link/136929a11b983e70981aaa17550ba1b2

2. Install redis

#2.1 下载安装包
wget http://download.redis.io/releases/redis-4.0.8.tar.gz
 
#2.2 解压
tar zxf redis-4.0.8.tar.gz

1 is the downloaded installation Package, 2 is the unzipped folder. Remember this file directory, I decompressed it under /root, and I will use the files in this redis directory for subsequent startup

#2.3编译
cd redis-4.0.8/src
make

make complete There are four executable files ##redis-server, redis-benchmark## in the SRC directory in redis-4.0.8 #, redis-cli and redis.conf.

#2.4 新建redis文件夹
mkdir /usr/local/redis

#2.5移动文件
cd redis-4.0.8/src
mv redis-server /usr/local/redis
mv redis-benchmark /usr/local/redis
mv redis-cli /usr/local/redis
cd ../
mv redis.conf /usr/local/redis

#2.6 启动redis
cd /usr/local/redis
./redis-server #这个是以默认配置开启，配置文件redis.conf 开机自启要用到。

As shown in the picture above, start according to the configuration file and prompt to start success.

Possible warnings:

WARNING: The TCP backlog setting of 511 cannot be enforced because /proc/sys/net/core/somaxconn is set to the lower value of 128.

Solution:

vim /etc/sysctl.conf

Start a new line and add:

net.core.somaxconn = 511

Save and exit

Then: sysctl -p

WARNING overcommit_memory is set to 0! Background save may fail under low memory condition. To fix this issue add 'vm.overcommit_memory = 1' to /etc/sysctl.conf and then reboot or run the command 'sysctl vm.overcommit_memory=1' for this to take effect.

Solution:

vim /etc/sysctl.conf

Newline add: vm.overcommit_memory=1
Exit after saving
sysctl -p

WARNING you have Transparent Huge Pages (THP) support enabled in your kernel. This will create latency and memory usage issues with Redis. To fix this issue run the command 'echo never > /sys/kernel/mm/transparent_hugepage/enabled' as root, and add it to your /etc/rc.local in order to retain the setting after a reboot. Redis must be restarted after THP is disabled.

Solution:

vim /etc/rc.local

Newline add:

if test -f /sys/kernel/mm/transparent_hugepage/enabled; then
   echo never > /sys/kernel/mm/transparent_hugepage/enabled
fi

Exit after saving

Restart the system, restart Server:

reboot


Generally, a new server will have these three warnings when it first installs redis and then starts it.

#2.7 连接redis，进行测试
./redis-cli
set pandent 2018
get pandent

The setting and retrieval are normal, indicating that redis has been installed successfully.

Recommended study: "

PHP Video Tutorial

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