Shulou(Shulou.com)06/01 Report--

This article will explain in detail about the need to restart the replacement of redis, the content of the article is of high quality, so the editor will share it for you as a reference. I hope you will have a certain understanding of the relevant knowledge after reading this article.

Redis is an open source API that is written in ANSI C language, supports the network, can be memory-based and persistent, and provides API 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 with the following command

/ 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 redis's client program redis-cli

Redis-cli-h 127.0.0.1-p 6379 shutdown

If none of the above methods successfully stops redis, the ultimate weapon kill-9 can be used.

A restart is required only if the following three configurations are changed:

1.appendfsync no

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

2.appendfsync everysec

Redis calls fsync every 1 second to write buffer data to disk. If fsync exceeds 1, fsync will be delayed to the second second, but the maximum is 2 seconds.

3.appendfsync always

For every write operation, redis calls fsync to write buffer data to disk, which is the safest data, but performance is degraded!

Need to restart on the replacement of redis to share here, I hope that the above content can be of some help to you, can learn more knowledge. If you think the article is good, you can share it for more people to see.

Welcome to subscribe "Shulou Technology Information " to get latest news, interesting things and hot topics in the IT industry, and controls the hottest and latest Internet news, technology news and IT industry trends.