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Next Level Redis With Spring

Christoph Strobl, 2016

Twitter: @stroblchristoph

Email: [email protected]

Requirements

In order to run the samples contained in this repository we need to have a single Redis instance as well a Redis cluster running. Please download latest Redis distibution from http://redis.io/download.

Single Node Setup

$ tar -xvf redis.tar.gz
$ cd redis
redis $ make
redis $ ./src/redis-server

It is now possible to connect to the cluster using the redis-cli.

redis/src $ ./redis-cli

Cluster Setup

To quickly set up a cluster of 6 nodes (3 master | 3 slave) go to the redis/utils/create-cluster directory.

redis/utils/create-cluster $ ./create-cluster start
  Starting 30001
  Starting 30002
  Starting 30003
  Starting 30004
  Starting 30005
  Starting 30006

On first initialization cluster nodes need to form the cluster by joining and assigning slot allocations.

INFO: This has to be done only once.

redis/utils/create-cluster $ ./create-cluster create
  >>> Creating cluster
  >>> Performing hash slots allocation on 6 nodes...
  Using 3 masters:
    127.0.0.1:30001
    127.0.0.1:30002
    127.0.0.1:30003
  Adding replica 127.0.0.1:30004 to 127.0.0.1:30001
  Adding replica 127.0.0.1:30005 to 127.0.0.1:30002
  Adding replica 127.0.0.1:30006 to 127.0.0.1:30003

  M: 10696916f57e58c5edce34127b23ca7af1b669a0 127.0.0.1:30001
     slots:0-5460 (5461 slots) master
  M: 5b0e1b4cc87175326ba79d00ecfc6f5dbdb424a7 127.0.0.1:30002
     slots:5461-10922 (5462 slots) master
  M: 5f3e978fb40b1d9c910d904ea19a0494b78668aa 127.0.0.1:30003
     slots:10923-16383 (5461 slots) master
  S: d1717c418d03db93183ce2d791ba6f48be5cf028 127.0.0.1:30004
     replicates 10696916f57e58c5edce34127b23ca7af1b669a0
  S: c7dfcdb9cd1105e4251de51c4ade54de59bb063c 127.0.0.1:30005
     replicates 5b0e1b4cc87175326ba79d00ecfc6f5dbdb424a7
  S: 3219785a9145717f30648a27a2dd07359e9dd46f 127.0.0.1:30006
     replicates 5f3e978fb40b1d9c910d904ea19a0494b78668aa

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

  [OK] All nodes agree about slots configuration.
       >>> Check for open slots...
       >>> Check slots coverage...
  [OK] All 16384 slots covered.

It is now possible to connect to the cluster using the redis-cli.

redis/src $ ./redis-cli -c -p 30001
  127.0.0.1:30001> cluster nodes

  106969... 127.0.0.1:30001 myself,master - 0 0 1 connected 0-5460
  5b0e1b... 127.0.0.1:30002 master - 0 1450765112345 2 connected 5461-10922
  5f3e97... 127.0.0.1:30003 master - 0 1450765112345 3 connected 10923-16383
  d1717c... 127.0.0.1:30004 slave 106969... 0 1450765112345 4 connected
  c7dfcd... 127.0.0.1:30005 slave 5b0e1b... 0 1450765113050 5 connected
  321978... 127.0.0.1:30006 slave 5f3e97... 0 1450765113050 6 connected

To shutdown the cluster use the create-cluster stop command.

redis/utils/create-cluster $ ./create-cluster stop

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