ridiff backup failers

Ben Escoto bescoto@stanford.edu
Tue, 22 Jan 2002 15:20:27 -0800

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>>>>> "mw" == mike wolman <mike@nux.co.uk>
>>>>> wrote the following on Tue, 22 Jan 2002 23:20:40 +0000 (GMT)

  mw> Is it possible to delete a backup taken at a particular time
  mw> rather than before a set time,

  mw> as i am having to wade through a load of files on some of the
  mw> failed backups and rerunning rdiff-backup to see what else needs
  mw> to be deleted - it would be nice to simply delete any files
  mw> created by the "last" backup.

Sorry, this is impossible because each backup depends on the backups
before it.  For instance, suppose a file changes from state A to B to
C.  The last backup stores the information about getting C back to B,
and the backup before that knows how to get B back to A.  If you
delete the C->B backup, then you render the previous backup useless
because it only knows B->A instead of C->A.  The information needed to
recover A is lost.

Ben Escoto

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