Parallel Processing in Ruby On Rails

I used ruby's fork when I was sending 60,000 emails from one of Rails applications and it is wise to split the big result set and send emails of each chunk parallely on forks for faster processing! Here is a sample ruby code for processing N length data.

	fork do
	ActiveRecord::Base.establish_connection
	for i in 0..20000
	puts 'I m in sub process-1'
	end
	exit
	end
	fork do
	ActiveRecord::Base.establish_connection
	for i in 2001..40000
	puts 'I m in sub process-2'
	end
	exit
	end
	.......
	fork do
	ActiveRecord::Base.establish_connection
	for i in 40000..N
	puts 'I m in sub process-M'
	end
	exit
	end

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I tested it on Ubuntu 11, ruby 1.9.2, Rails 3.0.10