环境说明：
172.20.0.1 旧redis 172.20.0.2 新redis node101 任意linux系统
1.安装redis-dump工具
[root@node111 ~]# yum install ruby rubygems ruby-devel -y # 更改gem源 [root@node111 ~]# gem sources -a http://ruby.taobao.org Error fetching http://ruby.taobao.org: bad response Not Found 404 (http://ruby.taobao.org/specs.4.8.gz)
访问http://ruby.taobao.org，公告通知镜像维护站点已迁往Ruby China镜像
[root@node111 ~]# gem sources --add https://gems.ruby-china.org/ --remove https://rubygems.org/ https://gems.ruby-china.org/ added to sources source https://rubygems.org/ not present in cache [root@node111 ~]# gem sources -l *** CURRENT SOURCES *** https://gems.ruby-china.org/
[root@node111 ~]# gem install redis-dump -V
2.node101导出
[root@node111 ~]# redis-dump -u :password@172.20.0.1:6379 > 172.20.0.1.json
3.node101导入
[root@node111 ~]# cat 172.20.0.1.json | redis-load -u :password@172.20.0.2:6379
原文：http://www.cnblogs.com/hjfeng1988/p/7146009.html