Redis数据导入导出以及数据迁移的4种方法详解

# 清空上文目标实例全部数据
redis-cli -h 目标RedisIP -a password flushall
# 源实例开启 aof 功能，将在 dir 目录下生成 appendonly.aof 文件
redis-cli -h 源RedisIP -a password config set appendonly yes

config get dir
# 比如我的 Mac 上执行上面的命令后，返回如下内容
1) "dir"
2) "/usr/local/var/db/redis"

# 将 appendonly.aof 文件放在当前路径下
redis-cli -h 目标RedisIp -a password --pipe < appendonly.aof
# 源实例关闭 aof 功能
redis-cli -h 源RedisIp -a password config set appendonly no

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#!/bin/bash

#redis 源ip
src_ip=192.168.1.4
#redis 源port
src_port=6379

#redis 目的ip
dest_ip=127.0.0.1
#redis 目的port
dest_port=6389

#要迁移的key前缀
key_prefix=

i=1

redis-cli -h $src_ip -p $src_port -a password keys "${key_prefix}*" | while read key
do
  redis-cli -h $dest_ip -p $dest_port -a password del $key
  redis-cli -h $src_ip -p $src_port -a password --raw dump $key | perl -pe 'chomp if eof' | redis-cli -h $dest_ip -p $dest_port -a password -x restore $key 0
  echo "$i migrate key $key"
  ((i++))
done

# 没安装 ruby 的话，先安装 ruby
brew install ruby
# 移除 gem 自带源
gem sources --remove https://rubygems.org/ 
# 添加淘宝源
gem sources -a https://ruby.taobao.org/ 
# 安装 redis-dump
gem install redis-dump -V

# 替换镜像地址
gem sources --add http://gems.ruby-china.org/ --remove http://rubygems.org/
# 确认镜像地址是否替换成功
gem sources -l
# 替换成功后再安装 redis-dump
gem install redis-dump -V

# redis-dump 导出
redis-dump -u :password@源RedisIp:6379 > 源Redis数据文件.json
# redis-load 导入
cat 源Redis数据文件.json | redis-load -u :password@目标RedisIp:6379

# 源实例关闭 aof 功能
redis-cli -h 源RedisIp -a password config set appendonly no

# 固化数据到 RDB 文件
save

kill -9 redis
# 或者
pkill -9 redis
# 或者手段关闭 Redis 服务