What redis that?

redis is a software that helps developers on a machine memory to operate .

You can be doing?

Memory for the operating software.

--- do persist

　　AOF: Redis sucked execution of each write command recorded in a separate log file AOF file execute the command again when Redis restart when to recover the data.

　　ROB: RDB persistence is the process of writing data to a file.

- the equivalent of a large dictionary

- single-threaded process

type of data

1. String

k1: "This is a sad story."

2. List

k2：[1,2,3,4,5,6,7,8]

3. collection

Q3: {1,2,3,4,5,6}

4. Dictionary

k4:{ name:123, age:666 }

5. ordered set

k5：｛('alex',60),('eva-j'80),('rt',70)｝

operating

redis-py provides two classes for implementing Redis Redis and StrictRedis commands StrictRedis for implementing most of the official order,

And use of official syntax and commands , Redis is StrictRedis subclass, for backward compatibility with older versions of redis-py.

Ordinary redis

Import redis 

# 1. Create a connection redis 
R & lt redis.Redis = (Host = ' 127.0.0.1 ' , Port = 6379 ) 

# 2. only set a value into redis 
r.set ( ' foo ' , ' Bar ' ) 

# 3 to the value redis 
Print (r.get ( ' foo ' ))

Connection pooling redis

Why use connection pooling?

redis-py using a connection pool to manage all the connections to a redis server , avoid each establishment, connection release overhead . By default, each instance of Redis will maintain its own connection pool.

Can establish a direct connection pool, then Redis as parameters, this can be achieved Redis multiple instances share a connection pool.

# Connection pool 

Import redis
 # 1. Create a connection pool redis 
the pool redis.ConnectionPool = (Host = ' 127.0.0.1 ' , Port = 6379 ) 

# 2. Each instance Redis will maintain its own connection pool. 
redis.Redis = R & lt (= connection_pool the pool) 

# 3. Add the values Redis 
r.set ( ' foo ' , ' Bar ' ) 

# 4. values 
Print (r.get ( ' foo ' ))

redis introduction and operation