[Top][All Lists]

[Date Prev][Date Next][Thread Prev][Thread Next][Date Index][Thread Index]

Re: [rdiff-backup-users] rdiff-backup file consistency

From: Robert Nichols
Subject: Re: [rdiff-backup-users] rdiff-backup file consistency
Date: Wed, 06 Jun 2012 08:54:00 -0500
User-agent: Mozilla/5.0 (X11; Linux x86_64; rv:10.0.4) Gecko/20120424 Thunderbird/10.0.4

On 06/06/2012 02:10 AM, Florian Kaiser wrote:
The creators were aware of this and build in a verify-at TIME option.
Using this after each backup will make a test-restore of every file up
to the  given timestamp and thus verify each increment, giving you the
guarantee that you will be able to restore up to that state.

That is dangerously misleading.

A) The test only verifies that the files that existed at TIME can be
   restored to their state at that time.  Such a restoral might or
   might not make use of all the intermediate increments between the
   current mirror and the given TIME.

B) There is no test that a restore to any other time can be performed
   without error.  The only checksum that is verified is the one for
   the given TIME.  The only mirror_metadata file (which is where the
   checksums are stored) that is read is the one for the given TIME.
   The mirror_metadata files for other times could be corrupted or
   missing, and no error will be reported.

Bob Nichols     "NOSPAM" is really part of my email address.
                Do NOT delete it.

reply via email to

[Prev in Thread] Current Thread [Next in Thread]