rooms.rb

require 'rubygems'
require 'redis'

r = Redis.new
item_id = 0
r.pipelined {
    5000000.times {
        room = sprintf("%.4d",rand(1000))
        price = sprintf("%.2f",(rand(10000)/100.0))
        price = "0"+price if price.length < 5
        r.zadd("myindex",0,"#{room}:#{price}:#{item_id}")
        item_id += 1
    }
}