Simple and crude Redis data backup and recovery method

The sample

Goal: copy the redis data from the server CentOS to the Mac machine

Steps:

Find the dump file location on CentOS

vi /etc/redis.conf
dbfilename dump.rdb 
dir /var/lib/redis

Description file in

/var/lib/redis/dump.rdb

Find the dump file location on mac

vi /usr/local/etc/redis.conf


dbfilename dump.rdb 
dir /usr/local/var/db/redis

Copy the dump.rdb on the server to the mac machine

scp root@dv:/var/lib/redis/dump.rdb ./

Restart Redis on mac

launchctl unload ~/Library/LaunchAgents/homebrew.mxcl.redis.plist 
launchctl load ~/Library/LaunchAgents/homebrew.mxcl.redis.plist

PS: backup scripts
Look at the following script,

#! /bin/bash

PATH=/usr/local/bin:$PATH
redis-cli SAVE

date=$(date +"%Y%m%d")
cp /var/lib/redis/6379/dump.rdb /data01/cache_backup/$date.rdb

echo "done!"

Just like the above script, you can backup the redis data files by cron and other methods. The details are as follows:
SAVE must be done first, because redis's rdb file is not always the full image of the in-memory data. SAVE must be done before backup, that is, the SAVE command is sent to it, and then the rdb file can be copied.
rdb path of concrete is not 1 above, can find in redis configuration file, / etc/redis / 6379. conf

# The filename where to dump the DB
dbfilename dump.rdb

# The working directory.
#
# The DB will be written inside this directory, with the filename specified
# above using the 'dbfilename' configuration directive.
#
# Also the Append Only File will be created inside this directory.
#
# Note that you must specify a directory here, not a file name.
dir /var/lib/redis/6379