redis back up and clean

redis_backup.rake

require File.join(File.dirname(__FILE__), '../../config/environment')

task :redis_bk_and_clean => :environment do
  fout = File.open("../redis-backup/redis-backup-and-clean-#{Time.now}.txt",'w')

	$redis.keys.each_with_index do |key, k_i|
		fout.puts "------- key_#{k_i}: #{key}, type: #{$redis.type(key)} -------"
		if $redis.type(key) == "zset"
			$redis.zrange(key, 0, -1).each do |member|
				fout.puts "#{member}:#{$redis.zscore(key, member)}"
			end
		elsif $redis.type(key) == "set"
			fout.puts $redis.smembers(key)
		elsif $redis.type(key) == "hash"
			fout.puts $redis.hgetall(key)
		end
		$redis.del(key)
	end

end