How to restart the redis command
Redis can be restarted in two ways: smooth restart and hard restart. Smooth restart without interrupting service, allowing the client to continue operations; hard restart terminates the process immediately, causing the client to disconnect and lose data. It is recommended to use a smooth restart in most cases, only if you need to fix serious errors or clean up your data.
Redis restart command
There are two ways to restart Redis:
1. Smooth restart
Smooth restart does not interrupt Redis service, allowing clients to continue connecting and executing commands during the restart.
Command: REDIS_RESTART_CMD=smooth-restart ./redis-server /path/to/redis.conf
2. Hard restart
A hard restart will immediately terminate the Redis process, causing the client to disconnect and lose data.
Command: REDIS_RESTART_CMD=hard-restart ./redis-server /path/to/redis.conf
The difference between smooth restart and hard restart:
- Smooth restart : No failover time, the client can continue to operate.
- Hard restart : causes failover time, client disconnection, and data loss.
Select the restart type:
- Smooth restart : Recommended for most cases as it does not interrupt service.
- Hard Reboot : Used only if you need to fix critical errors or clean up your data.
Restart process details:
Smooth restart
- Start a new Redis process.
- The new process loads the configuration and starts processing the commands.
- The old process enters read-only mode and gradually closes the client connection.
Hard restart
- Terminates the old Redis process.
- Start a new Redis process.
- The new process loads the configuration and starts processing the commands.
The above is the detailed content of How to restart the redis command. For more information, please follow other related articles on the PHP Chinese website!
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