Playing with redis migrations

ping-pong.rb

require "rubygems"
require "redis"

origin = Redis.new(host: '127.0.0.1', port: 6379)
destination = Redis.new(host: '127.0.0.1', port: 6380)

500.times do |i|
  origin.set(i, "value#{i}")
end

loop do
  puts "Keys in origin: #{origin.keys("*").length}"
  puts "Keys in destination: #{destination.keys("*").length}"

  puts "Migrating..."

  origin.keys("*").each do |key|
    origin.migrate(destination[:host], destination[:port], key, 0, 1000)
  end

  puts "Keys in origin: #{origin.keys("*").length}"
  puts "Keys in destination: #{destination.keys("*").length}"

  puts "Migrating backwards..."

  destination.keys("*").each do |key|
    destination.migrate(origin[:host], origin[:port], key, 0, 1000)
  end

  puts
  sleep 0.5
end