GCSの費用簡易計算

gcs_calc.rb

# 毎月増えるログの量
log_size = 500
# 何ヶ月先までのコストを計算するか
target_month = 12 * 5
# 1ドル何円換算するか
exchange_rate = 145
# 満何ヶ月後にnearlineに移動させるか
nearline_threshold = 12
# 満何ヶ月後にcoldlineに移動させるか
coldline_threshold = 24
# 満何ヶ月後にarchiveに移動させるか
archive_threshold = 36
# 満何ヶ月後に削除するか
delete_threshold = 1000

# GCPのストレージ単価
regional_cost = 0.02
nearline_cost = 0.01
coldline_cost = 0.007
archive_cost  = 0.0025

cost = 0
regional_log = 0
nearline_log = 0
coldline_log = 0
archive_log  = 0
(1..target_month).each do |i|
  break if i > delete_threshold

  regional_log += log_size
  if i > nearline_threshold && nearline_threshold < delete_threshold
    regional_log -= log_size
    nearline_log += log_size
  end
  if i > coldline_threshold && coldline_threshold < delete_threshold
    nearline_log -= log_size
    coldline_log += log_size
  end
  if i > archive_threshold && archive_threshold < delete_threshold
    coldline_log -= log_size
    archive_log += log_size
  end
  cost +=
    regional_log * regional_cost +
    coldline_log * coldline_cost +
    archive_log  * archive_cost
  puts "month: #{i}\tcost: #{cost.ceil}\tregional: #{regional_log}GB\tnearline: #{nearline_log}GB\tcoldline: #{coldline_log}GB\tarchive: #{archive_log}GB\ttotal: #{regional_log + nearline_log + coldline_log + archive_log}"
end