Does replacing redis require a restart?

Redis is an open source log-type Key-Value database written in ANSI C language, supports network, can be memory-based and persistent, and provides APIs in multiple languages.

How to restart the redis service

If you installed redis with apt-get or yum install, You can stop/start/restart redis directly through the following commands

/etc/init.d/redis-server stop

##/etc/init.d/redis-server start

/etc/init.d/redis-server restart

If redis is installed through source code, you can restart redis through the shutdown command of the redis client program redis-cli

redis-cli -h 127.0.0.1 -p 6379 shutdown

If none of the above methods successfully stop redis, you can use the ultimate weapon kill -9

Restarting is only required when changing the following three configurations:

1.appendfsync no

appendfsync This is no, redis will not actively call fsync to synchronize the log to the disk. At this time , depending on the operating system, most Linux operating systems call fsync every 30s to synchronize the buffer log to the disk

2.appendfsync everysec

redis every 1 second , call fsync to write the buffer data to the disk. If fsync exceeds 1, fsync will be delayed to the second second, but up to 2s,

3.appendfsync always

each For write operations, redis will call fsync to write the buffer data to the disk. This is the safest data, but the performance will decrease!

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