Redis database, which can be understood by zero foundation Xiaobai, is easy to learn and use!

Preface

Redis（Remote Dictionary Server ), Remote dictionary service , Is an open source use ANSI C Language writing 、 Support network 、 Log type that can be memory based or persistent 、Key-Value database , And provide multilingual API.

Redis Is a high-performance key-value database . To ensure efficiency , The data is cached in memory .

Redis Periodically, updated data is written to disk or changes are written to an appended log file , And on this basis to achieve master-slave( Master-slave ) Sync .

—— Excerpt from ： Baidu Encyclopedia

Installation steps

1. Download the source code

# Carry out orders ：
wget http://download.redis.io/releases/redis-7.0.3.tar.gz

2. Decompress the source code

# Carry out orders ：
tar -zxvf redis-7.0.3.tar.gz

3. Go to unzip directory

# Carry out orders ：
cd redis-7.0.3

4. compile Redis

# Carry out orders ：
make install

Be careful ：

make After the command is executed and compiled , Will be in src Generate under directory 6 Executable files , Namely ：

• redis-server
• redis-cli
• redis-benchmark
• redis-check-aof
• redis-check-rdb
• redis-sentinel

5. take redis-server Put it in the specified directory

After compilation redis-server I put the file locally /Users/tools/redis-7.0.3/src In the catalog

Because in utils In the catalog redis_init_script Configured in the file redis-server The path is ：/usr/local/bin/redis-server

Use the following command to redis-server Copy to the specified directory

cp /Users/tools/redis-7.0.3/src/redis-server /usr/local/bin

View version

1. see redis-server edition

redis-server --version

The above prompt message indicates that the configuration is successful

2. see redis-cli edition

redis-cli --version

The above prompt message indicates that the configuration is successful

start-up Redis The server

1. Start command

(1).redis-server --requirepass 123456 --port 1234 > redis.log &

(2).redis-server  Profile path  > redis.log &

2. Parameter interpretation

--requirepass 123456: Add connection authentication password 123456

--port 1234: Start the service at 1234 port , Do not use the default port 6379

> redis.log: Write the startup log redis.log In file , Do not output directly to the current screen

&: Put the service in the background

3. View running processes

jobs |grep Running

4. Be careful

Specify the port number or use the default port number 6379 front , First use netstat -a |grep 6379 Command to check whether the port is occupied , It can only be used if it is not occupied

When the use port is occupied , Start up redis-server During service, the log will give the following error prompt , Here we use 6379 The port is occupied as an example

start-up Redis client

#  Connect locally initiated redis service 
(1).redis-cli

(2).redis-cli -h  host IP Address  -p  port 

Start up redis-server The service , The order I used was ： redis-server --requirepass 123456 > redis.log &

So when connecting redis Authentication password is required for service , Use command ： auth 123456 Carriage return certification , If the password authentication is successful OK A hint of , As shown in the above figure redis Service connection successful

1. Store key value pairs

#  Carry out orders ：
set username candy

2. Read Key

#  Carry out orders ：
get username

3. Set timeout

#  Deposit key:username,value:Tony The key value pair of is valid for 30 second 
set username Tony ex 30

4. Check the key value lifetime

#  Carry out orders ：username- Key value 
ttl username

The content shared today is quite basic , Be friendly to novices or little friends with little experience , We will continue to update about Redis Related articles of