merge.rb

#!/usr/bin/env ruby

require 'colorize'

regions = ARGF.each_line.collect do |l|
  l.chomp!
  next if l.length < 1
  l
end.compact

puts "Total Regions: #{regions.length}"

merged = 0

regions.each_slice(2) do |to_merge|
  next if to_merge.length < 2
  puts "Merging " + "(".blue + "#{merged+=1}/#{regions.length/2}".cyan + ")".blue + ":"
  puts "\t" + to_merge.first.light_green + " and "
  puts "\t" + to_merge.last.green
  system "hbase org.apache.hadoop.hbase.util.Merge #{to_merge.first.split(',').first} #{to_merge.first} #{to_merge.last}"
end