Class: DB2S3

Inherits:
Object
  • Object
show all
Defined in:
lib/db2s3.rb

Defined Under Namespace

Classes: Config, S3Store

Instance Method Summary collapse

Constructor Details

#initialize ⇒ DB2S3

Returns a new instance of DB2S3.



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# File 'lib/db2s3.rb', line 9

def initialize
end

Instance Method Details

#clean ⇒ Object

TODO: This method really needs specs



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# File 'lib/db2s3.rb', line 25

def clean
  to_keep = []
  filelist = store.list
  files = filelist.reject {|file| file.ends_with?(most_recent_dump_file_name) }.collect do |file|
    {
      :path => file,
      :date => Time.parse(file.split('-').last.split('.').first)
    }
  end
  # Keep all backups from the past day
  files.select {|x| x[:date] >= 1.day.ago }.each do |backup_for_day|
    to_keep << backup_for_day
  end

  # Keep one backup per day from the last week
  files.select {|x| x[:date] >= 1.week.ago }.group_by {|x| x[:date].strftime("%Y%m%d") }.values.each do |backups_for_last_week|
    to_keep << backups_for_last_week.sort_by{|x| x[:date].strftime("%Y%m%d") }.first
  end

  # Keep one backup per week since forever
  files.group_by {|x| x[:date].strftime("%Y%W") }.values.each do |backups_for_week|
    to_keep << backups_for_week.sort_by{|x| x[:date].strftime("%Y%m%d") }.first
  end

  to_destroy = filelist - to_keep.uniq.collect {|x| x[:path] }
  to_destroy.delete_if {|x| x.ends_with?(most_recent_dump_file_name) }
  to_destroy.each do |file|
    store.delete(file.split('/').last)
  end
end

#full_backup ⇒ Object 



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# File 'lib/db2s3.rb', line 12

def full_backup
  file_name = "dump-#{db_credentials[:database]}-#{Time.now.utc.strftime("%Y%m%d%H%M")}.sql.gz"
  store.store(file_name, open(dump_db.path))
  store.store(most_recent_dump_file_name, file_name)
end

#restore ⇒ Object 



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# File 'lib/db2s3.rb', line 18

def restore
  dump_file_name = store.fetch(most_recent_dump_file_name).read
  file = store.fetch(dump_file_name)
  run "gunzip -c #{file.path} | mysql #{mysql_options}"
end

#statistics ⇒ Object 



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# File 'lib/db2s3.rb', line 56

def statistics
    # From http://mysqlpreacher.com/wordpress/tag/table-size/
  results = ActiveRecord::Base.connection.execute(<<-EOS)
  SELECT
    engine,
    ROUND(data_length/1024/1024,2) total_size_mb,
    ROUND(index_length/1024/1024,2) total_index_size_mb,
    table_rows,
    table_name article_attachment
    FROM information_schema.tables
    WHERE table_schema = '#{db_credentials[:database]}'
    ORDER BY 3 desc;
  EOS
  rows = []
  results.each {|x| rows << x.to_a }
  rows
end