Parallel gem and find_in_batches with start, end

parallel_find_in_batches_start_end

num_processes = 2                                                                
batch_size = 1000                                                                
threads_per_process = 10                                                         
                                                                                 
Parallel.map(0...num_processes, :in_processes => num_processes) do |i|·          
  User.connection.reconnect!                                                     
  User.find_in_batches(:batch_size => batch_size,·                               
                       :start => (User.count/num_processes) * i,·                
                       :conditions => ["id <= ?", (User.count/num_processes)*(i+1)]) do |batch|·
    Parallel.map(batch, :in_threads => threads_per_process) do |record|          
      puts record.inspect                                                        
    end·                                                                         
  end
end