这篇文章主要介绍redis数据备份和迁移工具redis-dump如何安装使用，文中介绍的非常详细，具有一定的参考价值，感兴趣的小伙伴们一定要看完！
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一.安装:
# git clone https://github.com/delano/redis-dump.git
Initialized empty Git repository in /root/shell/20180928/redis-dump/.git/
remote: Enumerating objects: 691, done.
remote: Total 691 (delta 0), reused 0 (delta 0), pack-reused 691
Receiving objects: 100% (691/691), 2.09 MiB | 53 KiB/s, done.
Resolving deltas: 100% (293/293), done.
#gem install redis
Fetching: redis-4.0.2.gem (100%)
Successfully installed redis-4.0.2
Parsing documentation for redis-4.0.2
Installing ri documentation for redis-4.0.2
Done installing documentation for redis after 3 seconds
1 gem installed
#gem install uri-redis
Fetching: uri-redis-0.4.2.gem (100%)
Successfully installed uri-redis-0.4.2
Parsing documentation for uri-redis-0.4.2
Installing ri documentation for uri-redis-0.4.2
Done installing documentation for uri-redis after 0 seconds
1 gem installed
#gem install yajl-ruby
Fetching: yajl-ruby-1.4.1.gem (100%)
Building native extensions. This could take a while...
Successfully installed yajl-ruby-1.4.1
Parsing documentation for yajl-ruby-1.4.1
Installing ri documentation for yajl-ruby-1.4.1
Done installing documentation for yajl-ruby after 1 seconds
1 gem installed
#gem install drydock
Fetching: drydock-0.6.9.gem (100%)
Successfully installed drydock-0.6.9
Parsing documentation for drydock-0.6.9
Installing ri documentation for drydock-0.6.9
Done installing documentation for drydock after 1 seconds
1 gem installed
#ruby -rubygems bin/redis-dump
{"db":0,"key":"192.168.184.122:6379:CommandCount:1528291051","ttl":-1,"type":"zset","value":[["LLEN",1.0],["DEL",3.0],["BRPOP",7.0],["RPOP",234.0],["SELECT",236.0],["HGET",360.0],["LPUSH",437.0],["GET",460.0]],"size":68}
{"db":0,"key":"192.168.184.226:6379:KeyCount:1528190344","ttl":-1,"type":"zset","value":[["1",1.0],["None",2.0],["zhsq_kb_comment_data",9.0],["zhsq_ecom_comment_buffer",36.0],["zhsq_topic_filter_buffer",120.0],["zhsq_filter_buffer",132.0],["zhsq_topic_data",183.0],["zhsq_mon_buffer",191.0],["zhsq_data",214.0],["zhsq_jfilter_data",225.0]],"size":190}
{"db":0,"key":"192.168.184.122:6379:CommandCountByMinute","ttl":-1,"type":"hash","value":{"180605:9:23":"22393","180606:13:16":"945","180606:13:17":"3568","180606:13:20":"11768"},"size":64}
{"db":0,"key":"192.168.184.220:6379:CommandCountByMinute","ttl":-1,"type":"hash","value":{"180605:9:23":"22998","180606:13:16":"993","180606:13:17":"3818","180606:13:20":"12101"},"size":64}
{"db":0,"key":"192.168.184.213:6379:KeyCount:1528291078","ttl":-1,"type":"zset","value":[["*",1845.0]],"size":7}
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{"db":1,"key":"hello","ttl":-1,"type":"string","value":"world","size":5}
{"db":5,"key":"dsf","ttl":-1,"type":"string","value":"chenfeng","size":8}
{"db":5,"key":"hello","ttl":-1,"type":"string","value":"world","size":5}
{"db":6,"key":"love","ttl":-1,"type":"string","value":"peihy","size":5}
{"db":6,"key":"dsf","ttl":-1,"type":"string","value":"chenfeng","size":8}
{"db":6,"key":"hello","ttl":-1,"type":"string","value":"world","size":5}
{"db":7,"key":"love","ttl":-1,"type":"string","value":"peihy","size":5}
{"db":7,"key":"chenfeng","ttl":-1,"type":"string","value":"dsf","size":3}
二.使用:
全库备份例子:
#cd redis-dump/bin
#./redis-dump -u 127.0.0.1 > /root/shell/20180928/db_all.json
只备份redis某个库的例子:
首先往10号库里写点数据:
#redis-cli
127.0.0.1:6379[1]> select 10
OK
127.0.0.1:6379[10]> set China World
OK
127.0.0.1:6379[10]> set love chenfeng
OK
127.0.0.1:6379[10]> set fuck America
OK
只备份10号库:
#./redis-dump -u 127.0.0.1 -d 10 > /root/shell/20180928/db_10.json
查看内容：
[root@alpha-mongo-140-52 ~/shell/20180928/redis-dump/bin]#cat /root/shell/20180928/db_10.json
{"db":10,"key":"fuck","ttl":-1,"type":"string","value":"America","size":7}
{"db":10,"key":"love","ttl":-1,"type":"string","value":"chenfeng","size":8}
{"db":10,"key":"China","ttl":-1,"type":"string","value":"World","size":5}
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