redis-cluster是redis官方寫的叢集功能，目前還未加入穩定版，據說會在3.0上線的時候加入，但是開發版已經包含該功能

開發版的下載方式是git clone https://github.com/antirez/redis.git，前提是安裝了git

安裝配置過程參考官方已經出的教程http://redis.io/topics/cluster-tutorial，全英文

1、原始碼下載，make

2、新建6個instance，3個master，3個slave；

新建例項之前要改一下redis.conf的內容，先改埠號，再改下面的cluster配置項

################################ REDIS CLUSTER ############################### # # Normal Redis instances can't be part of a Redis Cluster;only nodes that are # started as cluster nodes can. In order to start a Redisinstance as a # cluster node enable the cluster support uncommenting thefollowing: # cluster-enabled yes

# Every cluster node has a cluster configuration file. Thisfile is not # intended to be edited by hand. It is created and updated byRedis nodes. # Every Redis Cluster node requires a different clusterconfiguration file. # Make sure that instances running in the same system does nothave # overlapping cluster configuration file names. # cluster-config-file nodes-6379.conf

# Cluster node timeout is the amount of seconds a node must beunreachable # for it to be considered in failure state. # Most other internal time limits are multiplicators of thenode timeout. # cluster-node-timeout 15 # In order to setup your cluster make sure to read thedocumentation # available at http://redis.io web site. 

3、src下面的ruby指令碼，建立叢集： --replicas 1的意思是每個master有1個slave。

./redis-trib.rb create --replicas 1 127.0.0.1:7000 127.0.0.1:7001 127.0.0.1:7002 127.0.0.1:7003 127.0.0.1:7004 127.0.0.1:7005

如果指令碼報錯：

custom_require.rb:36:in `require': cannot load such file -- redis (LoadError)
from /usr/lib/ruby/1.9.1/rubygems/custom_require.rb:36:in `require'
from ./redis-trib.rb:25:in `<main>'

那麼說明Ruby的redis介面沒有安裝，可以通過sudo gem install redis 進行安裝。

可能會詢問是否儲存設定

Can I set the above configuration? (type 'yes' to accept):

回答yes

再輸出一連串資訊後，會顯示OK

[OK] All 16384 slots covered.

這樣redis-cluster叢集就啟動了

檢視叢集目前狀況：

$ redis-cli -c -p 7000

127.0.0.1:7000> cluster info
cluster_state:ok
cluster_slots_assigned:16384
cluster_slots_ok:16384
cluster_slots_pfail:0
cluster_slots_fail:0
cluster_known_nodes:6
cluster_size:3
cluster_current_epoch:0
cluster_stats_messages_sent:8770
cluster_stats_messages_received:8770

測試存值取值：

127.0.0.1:7000> set foo bar
-> Redirected to slot [12182] located at 127.0.0.1:7002
OK
127.0.0.1:7002> set hello world
-> Redirected to slot [866] located at 127.0.0.1:7000
OK
127.0.0.1:7000> get foo
-> Redirected to slot [12182] located at 127.0.0.1:7002
"bar"
127.0.0.1:7000> get hello
-> Redirected to slot [866] located at 127.0.0.1:7000
"world"