Как задать количество хранимых бекапов гем backup?

Для бэкапа базы данных использую гем backup, что на ruby
Не получается задать количество последних бекапов. Количество растет с каждым днем
backup.rb
require 'yaml'
db_config = YAML.load_file('/var/www/site/shared/config/database.yml')['production']
smtp_config = YAML.load_file('/var/www/site/shared/config/backup_smtp.yml')

Model.new(:backup, 'Backup [production]') do
	
	compress_with Gzip do |compression|
		compression.level = 6
	end

	encrypt_with OpenSSL do |encryption|
		encryption.password = 'simple-password'
		encryption.base64   = true
		encryption.salt     = true
	end

	database PostgreSQL, db_config['database'] do |db|
		db.name					= db_config['database']
		db.username				= db_config['username']
		db.password				= db_config['password']
		db.host					= db_config['host']
		db.port					= db_config['port']
		db.skip_tables			= []
		db.only_tables			= []
		db.additional_options	= []
	end

	notify_by Mail do |mail|
		mail.on_success		= true
		mail.on_failure		= true

		mail.from			= smtp_config['user']
		mail.to				= smtp_config['default_mail']
		mail.address		= smtp_config['server']
		mail.port			= smtp_config['port']
		mail.domain			= smtp_config['domain']
		mail.user_name		= smtp_config['user']
		mail.password		= smtp_config['password']
		mail.authentication	= smtp_config['authentication']
		mail.encryption		= :starttls
	end


	store_with Local do |local|
		local.path	= '/var/www/site/'
		local.keep	= 15
	end
end


[2018/02/13 23:10:01][info] Performing Backup for 'Backup [production] (backup)'!
[2018/02/13 23:10:01][info] [ backup 4.2.0 : ruby 2.1.5p273 (2014-11-13 revision 48405) [x86_64-linux] ]
[2018/02/13 23:10:01][info] Database::PostgreSQL (site) Started...
[2018/02/13 23:10:01][info] Using Compressor::Gzip for compression.
[2018/02/13 23:10:01][info]   Command: '/bin/gzip -6'
[2018/02/13 23:10:01][info]   Ext: '.gz'
[2018/02/13 23:10:23][info] Database::PostgreSQL (site) Finished!
[2018/02/13 23:10:23][info] Creating Archive 'logs'...
[2018/02/13 23:10:23][info] Running system utility 'tar'...
[2018/02/13 23:10:23][info] tar:STDOUT: tar (GNU tar) 1.27.1
[2018/02/13 23:10:23][info] tar:STDOUT: Copyright (C) 2013 Free Software Foundation, Inc.
[2018/02/13 23:10:23][info] tar:STDOUT: License GPLv3+: GNU GPL version 3 or later <http://gnu.org/licenses/gpl.html>.
[2018/02/13 23:10:23][info] tar:STDOUT: This is free software: you are free to change and redistribute it.
[2018/02/13 23:10:23][info] tar:STDOUT: There is NO WARRANTY, to the extent permitted by law.
[2018/02/13 23:10:23][info] tar:STDOUT: 
[2018/02/13 23:10:23][info] tar:STDOUT: Written by John Gilmore and Jay Fenlason.
[2018/02/13 23:10:23][info] Using Compressor::Gzip for compression.
[2018/02/13 23:10:23][info]   Command: '/bin/gzip -6'
[2018/02/13 23:10:23][info]   Ext: '.gz'
[2018/02/13 23:10:28][info] Archive 'logs' Complete!
[2018/02/13 23:10:28][info] Packaging the backup files...
[2018/02/13 23:10:28][info] Using Encryptor::OpenSSL to encrypt the archive.
[2018/02/13 23:10:29][info] Packaging Complete!
[2018/02/13 23:10:29][info] Cleaning up the temporary files...
[2018/02/13 23:10:29][info] Storage::Local Started...
[2018/02/13 23:10:29][info] Storing '/var/www/site/backup/2018.02.13.23.10.01/backup.tar.enc'...
[2018/02/13 23:10:29][info] Cycling Started...
[2018/02/13 23:10:29][info] Storage::Local Finished!
[2018/02/13 23:10:29][info] Cleaning up the package files...
[2018/02/13 23:10:29][info] Backup for 'Backup [production] (backup)' Completed Successfully in 00:00:28
[2018/02/13 23:10:29][info] Sending notification using Notifier::Mail...


Нет реакции на local.keep = 15
и потом:
[2018/02/13 23:10:29][info] Cycling Started...
Но насколько успешно непонятно. Как побороть?
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Решения вопроса 1
@sunnmas Автор вопроса
Ruby
backup-4.2.0\lib\backup\storage\cycler.rb:

def cycle!
        Logger.info 'Cycling Started...'

        packages = yaml_load.unshift(package)
        Logger.info "packages.count: #{packages.count}"
        excess = packages.count - keep.to_i
        Logger.info "excess: #{excess}"

        if excess > 0
          packages.pop(excess).each do |pkg|
            Logger.info "pkg.time: #{pkg.time}"
            begin
              Logger.info "pkg.no_cycle: #{pkg.no_cycle}"
              remove!(pkg) unless pkg.no_cycle
            rescue => err
              Logger.warn Error.wrap(err, <<-EOS)
                There was a problem removing the following package:
                Trigger: #{pkg.trigger} :: Dated: #{pkg.time}
                Package included the following #{ pkg.filenames.count } file(s):
                #{ pkg.filenames.join("\n") }
              EOS
            end
          end
        end

        yaml_save(packages)
      end


[2018/02/15 10:12:26][info] Storing '/var/www/site/backup/2018.02.15.10.12.02/backup.tar.enc'...
[2018/02/15 10:12:27][info] Cycling Started...
[2018/02/15 10:12:27][info] packages.count: 1
[2018/02/15 10:12:27][info] excess: -14
[2018/02/15 10:12:27][info] Storage::Local Finished!
[2018/02/15 10:12:27][info] Cleaning up the package files...

Почему то видит только один бекап...

Выяснилось то что каждый раз при деплое удалялся файл Local.yml. В этом файле записано какие бекапы уже делались. В общем свой косяк.
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