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backupdiffrsyncduplicity

How to verify a file before backup?

I have heard that Duplicity is a nice tool for doing incremental backups.

The only thing I am concerned with is verification.

How does Duplicity check the backup for being consistent before it syncs it to a server? Does it actually do this?

It would not be nice to find oneself facing a corrupted backup file issue when trying to restore a backup.

As I understand, the basic workflow of Duplicity is the following:

  1. Generate a delta from a directory which has to be backed up;
  2. Sync this delta to a remote storage.

Is there any verification of this delta between 1 and 2?

P.S. I have found this, but it is used to see "what files, if any, have changed since the last backup" and not to verify the integrity and consistency of a backup file.

Solution

  • of course can duplicity verify existing backups. it just does not do this as it assumes that you are sensitive about traffic costs (s3 etc.).

    simply do as described in

    P.S. I have found this, but it is used to see "what files, if any, have changed since the last backup" and not to verify the integrity and consistency of a backup file.

    before the backup and conditionally start a full if that fails. be aware that the completre backup chain has to be downloaded for this so it will nearly double your traffic.

    ede/duply.net