Redis 3 cluster (i)

Overview

Only the operation steps and cluster tests are documented to ensure a fast cluster environment. Please refer to the Official document (Chinese version) for the specific principle:

Http://redisdoc.com/topic/cluster-tutorial.html

Http://redisdoc.com/topic/cluster-spec.html

Preparatory work

• Download and compile Redis

• Create 6 directories with the name of the port number, 7000~7005, modify the port number of the redis.conf

• To modify the configuration:

  cluster-enabled Yes

  Cluster-config-file nodes-6379.conf

  Cluster-node-timeout 15000

• Start each of these 6 services:./redis-server redis.conf

Installing the ruby Environment

sudo apt-get install Ruby

To install Ruby's Redis interface:

sudo gem install Redis

If you do not install, the following script will error:

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> '

Start the cluster

Go to the SRC directory of Redis and execute the command:

./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

The meaning of the command is as follows:

• The redis-trib.rb command for a given program is create , that means we want to create a new cluster.

• Option --replicas 1 indicates that we want to create a slave node for each master node in the cluster.

• The other parameters followed are the address lists of the instances, and we want the program to use the instance indicated by these addresses to create a new cluster.

View the current status of the cluster

$ redis-cli-c-P 7000127.0.0.1:7000> 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

Test stored value

127.0.0.1:7000> set Foo Bar

-Redirected to Slots [12182] located at 127.0.0.1:7002

Ok

127.0.0.1:7002> Set Hello World

-Redirected to Slots [866] located at 127.0.0.1:7000

Ok

127.0.0.1:7000> get foo

-Redirected to Slots [12182] located at 127.0.0.1:7002

"Bar"

127.0.0.1:7000> Get Hello

-Redirected to Slots [866] located at 127.0.0.1:7000

"World"

Redis 3 cluster (i)