redis_striping.rb

# encoding: UTF-8
# hey when is redis 2.8 coming out with clustering?
# I DON'T KNOW SO LET'S DO THIS HAPPY HORSE HOCKEY UNTIL THEN


require 'redis'
require 'redis/distributed'

r = Redis::Distributed.new [
  'redis://box1:6379',
  'redis://box2:6379',
  'redis://box3:6379'
]
r.flushdb

peeps = ['Alfred', 'Barry', 'Chet', 'Dave', 'Eli', 'Francine', 'Gertrude',
  'Hermy', 'Igor', 'Jasmine', 'KC', 'Lisa', 'Marice', 'Nick', 'Olivia',
  'Poe', 'Quincy', 'Rose', 'Sambo', 'Tia', 'Ulver', 'Veronica', 'Walter',
  'Yolanda', 'Ziggy'
]

peeps.each do |p|
  r.set p, 'present'
end


food = [ 'apple', 'banana', 'carrot', 'danish', 'egg', 'rose', 'rosé' ]
food.each do |f|
  r.set f, 'tasty'
end

# box1
# redis 127.0.0.1:6379> keys '*os*'
# 1) "rose"
# 2) "Rose"
#
# box2
# redis 127.0.0.1:6379> keys '*os*'
# (empty list or set)
#
# box3
# redis 127.0.0.1:6379> keys '*os*'
# 1) "ros\xc3\xa9"

# Oh no!  This is a problem!  Our keys are all over the place.
# When we remove or add a host this distribution will change.
# Boo!  That's where something like https://github.com/yankov/redis-migrator
# comes into play.  Or wait for redis-cluster in 2.8 or 3.0