gistfile1.rb

class User
  def increment_memcache_iterator
    Rails.cache.write("user-#{self.id}-memcache-iterator", self.memcache_iterator + 1)
  end

  def memcache_iterator
    # fetch the user's memcache key
    # If there isn't one yet, assign it a random integer between 0 and 10
    Rails.cache.fetch("user-#{self.id}-memcache-iterator") { rand(10) }
  end
end