thread safety issues

redis_thread_safe.rb

require 'rubygems'
require 'redis'

def random_redis
  100.times do 
    rand_key = "key_#{rand(100)}"
    rand_val = rand
    
    if (rand_val < 0.33)
      puts "Setting #{rand_key} to #{rand_key}: #{$redis.set(rand_key, rand_key)}"
    elsif (rand_val > 0.66)
      puts "Getting #{rand_key}: #{$redis.get(rand_key)}"
    else
      puts "Deleting #{rand_key}: #{$redis.del(rand_key)}"      
    end 
  end
end

$redis = Redis.new
$redis.set "foo", "bar"
puts $redis.get "foo"

forks = []
10.times do 
  forks << fork { 
    srand
    puts "Fork: pid #{Process.pid} - parent pid: #{Process.pid}"
    random_redis
  }  
end