lib/db2s3/tasks.rb @@ -2,7 +2,7 @@ Gem::Specification.new do |s| s.name = %q{db2s3} - s.version = "0.2" + s.version = "0.2.1" s.required_rubygems_version = Gem::Requirement.new(">= 0") if s.respond_to? :required_rubygems_version= s.authors = ["Xavier Shay"] @@ -16,6 +16,7 @@ Gem::Specification.new do |s| init.rb lib lib/db2s3.rb + lib/db2s3/tasks.rb rails rails/init.rb spec db2s3.gemspec @@ -23,14 +23,16 @@ class DB2S3 transfer_dollars_per_byte_per_month = 0.10 / 1024.0 / 1024.0 / 1024.0 full_dumps_per_month = 30 - storage_cost = dump_file.size * storage_dollars_per_byte_per_month - transfer_cost = dump_file.size * full_dumps_per_month * transfer_dollars_per_byte_per_month + storage_cost = (dump_file.size * storage_dollars_per_byte_per_month * 100).ceil / 100.0 + transfer_cost = (dump_file.size * full_dumps_per_month * transfer_dollars_per_byte_per_month * 100).ceil / 100.0 + requests_cost = 0.02 # TODO: Actually calculate this, with incremental backups could be more { :db_size => dump_file.size, :storage_cost => storage_cost, :transfer_cost => transfer_cost, - :total_cost => storage_cost + transfer_cost, + :total_cost => storage_cost + transfer_cost + requests_cost, + :requests_cost => requests_cost, :full_backups_per_month => full_dumps_per_month } end lib/db2s3.rb @@ -1 +1 @@ -require File.expand_path(File.dirname(__FILE__) + '/lib/db2s3') +require File.expand_path(File.dirname(__FILE__) + '/../lib/db2s3') rails/init.rb @@ -28,11 +28,21 @@ describe 'db2s3' do db2s3.stub!(:dump_db).and_return(stub("dump file", :size => 1024 * 1024 * 1024)) metrics = db2s3.metrics metrics.should == { - :storage_cost => 0.15, # 15c/GB-Month, we're only storing one backup + :storage_cost => 0.15, # 15c/GB-Month rounded up to nearest cent, we're only storing one backup :transfer_cost => 3.0, # 10c/GB-Month * 30 backups :db_size => 1024 * 1024 * 1024, # 1 GB - :total_cost => 3.15, + :total_cost => 3.17, + :requests_cost => 0.02, :full_backups_per_month => 30 # Default 1 backup/day } end + + it 'rounds transfer cost metric up to nearest cent' do + db2s3 = DB2S3.new + # 1 KB DB + db2s3.stub!(:dump_db).and_return(stub("dump file", :size => 1024)) + metrics = db2s3.metrics + metrics[:storage_cost].should == 0.01 + metrics[:transfer_cost].should == 0.01 + end end spec/db2s3_spec.rb @@ -15,15 +15,20 @@ namespace :db2s3 do s.sub(/\.?0*$/, units[e]) end + def format_cost(cost) + "%.2f" % [cost] + end + metrics = DB2S3.new.metrics puts <<-EOS Estimates only, does not take into account metadata overhead DB Size: #{format_size(metrics[:db_size])} Full backups/month: #{metrics[:full_backups_per_month]} -Storage Cost $US: #{metrics[:storage_cost]} -Transfer Cost $US: #{metrics[:transfer_cost]} -Total Cost $US: #{metrics[:total_cost]} +Storage Cost $US: #{format_cost(metrics[:storage_cost])} +Transfer Cost $US: #{format_cost(metrics[:transfer_cost])} +Requests Cost $US: #{format_cost(metrics[:requests_cost])} +Total Cost $US: #{format_cost(metrics[:total_cost])} EOS end end tasks/tasks.rake 96b6af36ec3a6288e8796b24c672150cbaeb5c4d Xavier Shay xavier@rhnh.net http://github.com/xaviershay/db2s3/commit/ad30c3a07ae2cc0cfe13f48e24a822fecb459347 ad30c3a07ae2cc0cfe13f48e24a822fecb459347 2009-03-07T17:46:50-08:00 2009-03-07T17:46:50-08:00 More accurate metrics 79bba7e3cda9c21b1cdae3ccdeaa2e7d9d90cf8d Xavier Shay xavier@rhnh.net