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I'm currently migrating a production environment from Mandriva 2010.1 to Debian 7.0 Wheezy. The old environment used the drakbackup tool provided with Mandriva for hourly backups. I'm planning on using bacula as a more permanent and distro-agnostic solution for the Debian environment. The problem is, I need to provide continuity in terms of being able to restore the previous Mandriva backups. Usually, I could restore them easily from within mcc (Mandriva Control Center); however, I'm not sure how to accomplish this manually.

What I know so far

  • Mandriva keeps lists of every archive's contents in gzipped text files.
  • Mandriva has gzip archives for base and incremental backups named after their creation time.
  • I can thus easily locate a certain file from the list files and extract the version I need from the base and incremental archives

What I need to know

  • How do I merge the base and incremental backups to form the "complete" file?
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Question turns out to be irrelevant. The name "incremental" misled me into thinking the incremental backups were actually deltas of changed files. It turns out, the incremental backups are full copies of the files that changed since the last backup was run.

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