Methods to compile redis and phpredis under Linux_php tips

This article describes how to compile redis and phpredis under Linux. Share it with everyone for your reference, the details are as follows:

1. Preparation

Download software: Download address of this website .
Operating system: CentOS 5.5
redis version: redis-2.6.9

2. Compile and install

tar zxvf redis-2.6.9.tar.gz //解压 
cd redis-2.6.9 
make  //编译 

If the following error occurs:

zmalloc.o: In function `zmalloc_used_memory':
/data/redis-2.6.9/src/zmalloc.c:223: undefined reference to `__sync_add_and_fetch_4'
collect2: ld returned 1 exit status
make[1]: *** [redis-server] Error 1
make[1]: Leaving directory `/data/redis-2.6.9/src'
make: *** [all] Error 2

Solution:

make CFLAGS="-march=i686" 

When you see "Hint: To run 'make test' is a good idea ;)" it means the compilation is successful.

make install  //安装 

Note: In fact, make install is:

cp -p redis-server /usr/local/bin
cp -p redis-benchmark /usr/local/bin
cp -p redis-cli /usr/local/bin
cp -p redis-check-dump /usr/local/bin
cp -p redis-check-aof /usr/local/bin

In this way, redis is installed successfully.

The next step is to start Redis. The executable files generated after compilation above are copied to the /usr/local/bin directory. Their functions are:

redis-server: daemon startup program for Redis server
redis-cli: Redis command line operation tool. Of course, you can also use telnet to operate according to its plain text protocol
redis-benchmark: Redis performance testing tool, test the read and write performance of Redis under your system and your configuration

To start the Redis process, you only need to execute this /usr/local/bin/redis-server /path-to/redis.conf

When starting, you must follow the redis configuration file, so that Redis will start smoothly.

3. Problems that may occur when starting redis

Warning: 32 bit instance detected but no memory limit set. Setting 3 GB maxmemory limit with 'noeviction' policy now.

Solution: Modify the configuration file redis.conf and set maxmemory to maxmemory 1024000000 #Allocate 256M memory

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.

Workaround: Warning: Overcommitted memory set to 0! In low memory environments, background saves may fail. To fix this, add 'vm.overcommit_memory = 1' to /etc/sysctl.conf and reboot (or run the command 'sysctl vm.overcommit_memory=1' ) for it to take effect.

There is no message when starting, indicating that the startup is successful. You can also use "netstat -tnl" to check whether port 6379 is started.

4. Open and close redis

Redis-server /usr/local/redis-2.6.9/redis.conf is enabled. Note: the redis configuration file needs to be specified

pkill redis-server stop redis
redis-cli shutdown stop redis

5. Parameter information of redis.conf

For information about redis and its parameters, please refer to this site's "Redis basic knowledge, installation, deployment, configuration notes "

6. Compile phpredis

unzip phpredis-master.zip
cd phpredis-master
/usr/local/php/bin/phpize
./configure –with-php-config=/usr/local/php/bin/php-config
make && make install

Modify the php.ini file. Load the redis.so module and restart Apache!

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I hope this article will be helpful to everyone in PHP programming.