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Re: [rdiff-backup-users] Unchanged Files Being Incremented
From: |
Andrew Ferguson |
Subject: |
Re: [rdiff-backup-users] Unchanged Files Being Incremented |
Date: |
Sun, 1 Feb 2009 10:30:45 -0500 |
On Feb 1, 2009, at 10:23 AM, Austin Roberts wrote:
I'm doing a backup (from Windows to Linux, though I'm not sure
that's relevant), and I've noticed that a lot of files (especially
pictures) that haven't changed at all are being incremented. It will
say "Processing changed file ..." "Incrementing mirror file ..."
Even though the file hasn't changed at all. The resulting diffs are
generally between 9 and 141 bytes.
Backing up from Windows to Linux is relevant because rdiff-backup
inspects the metadata on the file to determine whether it has changed
and should be backed up. Getting the algorithm right becomes more
complicated with platforms as different as Windows and Linux.
In order to help you, you're going to have to describe your situation
some more. What version of rdiff-backup are you running on each end?
Is it the native Windows client or the Cygwin client? How are you
doing the backup? If you gunzip one of the diff.gz files, what does it
say? (it will be in binary, use hexdump) ... What does md5 report for
the "different" files? How large are the files which are being marked
as "changed"?
I found a discussion of this from 2004, and the consensus seemed to
be that these were unique rsync deltas, even though the file hadn't
changed. Someone fixed it by doing md5sums of the files on each side
to make sure they were different before storing anything.
Can you send a link to that discussion? Given it's age, it's probably
not relevant to your particular situation. The rdiff-backup code has
changed a lot in the last five years.
thanks,
Andrew
- [rdiff-backup-users] Unchanged Files Being Incremented, Austin Roberts, 2009/02/01
- Re: [rdiff-backup-users] Unchanged Files Being Incremented,
Andrew Ferguson <=
- Message not available
- [rdiff-backup-users] Unchanged Files Being Incremented, Austin Roberts, 2009/02/01
- Re: [rdiff-backup-users] Unchanged Files Being Incremented, Andrew Ferguson, 2009/02/05
- Re: [rdiff-backup-users] Unchanged Files Being Incremented, Austin Roberts, 2009/02/11
- Re: [rdiff-backup-users] Unchanged Files Being Incremented, Austin Roberts, 2009/02/11
- Re: [rdiff-backup-users] Unchanged Files Being Incremented, Austin Roberts, 2009/02/11
- Re: [rdiff-backup-users] Unchanged Files Being Incremented, Matthew Flaschen, 2009/02/11
- Re: [rdiff-backup-users] Unchanged Files Being Incremented, Austin Roberts, 2009/02/26
- Re: [rdiff-backup-users] Unchanged Files Being Incremented, Josh Nisly, 2009/02/27
- Re: [rdiff-backup-users] Unchanged Files Being Incremented, Austin Roberts, 2009/02/28
- Re: [rdiff-backup-users] Unchanged Files Being Incremented, Matthew Flaschen, 2009/02/27