Tips for Executing Redis Shutdown Command（redis关闭连接命令）

Redis, an open-source memory data structure store, is widely used for web development and other data management applications. It stores data in the form of key-value pairs, hashes, lists, and sets, and provides its users with high performance, scalability and robustness. Redis also offers an easy-to-execute Shutdown command. But before performing the shutdown command, there are a few things to consider.

First, it is important to check the Redis configuration file for any changes to the variables. Specifically, by verifying the variable ‘save’, users can ensure that any changes made to the data will be persisted. If this variable has been configured to store data modifications, then they need to be flushed before shutting down Redis. If this variable is not configured, then the data will be lost when Redis shuts down.

Second, make sure to check if any clients are connected to the Redis server by running the command ‘ CLIENT LIST’. This command will return a list of all the clients connected to the Redis instance. Once all the clients have been disconnected, run the command ‘ SHUTDOWN’ to shut down the Redis server.

Third, after running the ‘ SHUTDOWN’ command, the Redis instance may no longer be reachable from clients. Therefore, to avoid data loss, it is important to execute a ‘BGSAVE’ command before executing the ‘ SHUTDOWN’ command. This will write all data to the disk and persist it across shutdowns.

Finally, Redis offers a ‘ SHUTDOWN NOSAVE’ command which will tell Redis to immediately shutdown without forcing a background save. This is useful if the data is not important and can be discarded.

In conclusion, the ‘ SHUTDOWN’ command allows users to shutdown Redis without risk of data loss. But, to ensure that all data is persisted, it is important to follow the above tips. Ensure that the configuration file variables are set correctly, all client connections are terminated, and a ‘ BGSAVE’ command is executed before shutting down Redis.

// To flush the modifications, run 
FLUSHALL 

// To check for connected clients, run
CLIENT LIST
// To save changes to disk before shutdown, run
BGSAVE 
// To shutdown Redis server, run
SHUTDOWN
// To immediately shutdown without saving data, run 
SHUTDOWN NOSAVE