Compressor::Bzip2, 'My Backup') do

  # Archives, Databases, etc...

  # to use default settings
  compress_with Bzip2

  # to customize settings
  compress_with Bzip2 do |compression|
    compression.level = 9

Bzip2 will give you higher compression than Gzip, but will take longer and use more memory. The compression level for Bzip2 is 9 by default, and may be set from 1 to 9.