Hi,
I have asked, because I have learnt about a tool, which calculates and
store checksums of individual files as extended attributes. The basic
idea was to check after a data transfer easily. I could imagine that
similar concept could help track nasty things happening on both backuppc
side and client side. Like checking sums of files which shouldn't change
etc. The point is, when one instance of hardlink is corrupted, all
others are too.
I believe, that ZFS can help with that, ZFS is not always possible.
Something like mentioned above would make it less dependet on filesystem.
Jan
On 01/02/2017 01:47 PM, Andreas Piening wrote:
Hi Jan,
the file based deduplication is based on checksums, so if a new file
is stored with the same name and file-size it will only be stored as a
new file if the checksum is different. If the checksum is different, a
hard link will be used to point at the already existing copy.
But these checksums are used for deduplication only and as far as I
know there is no additional integrity check, for example on a restore.
Honestly I don’t think it is really needed. I’m using a ZFS volume for
backuppc which has build in block level checksums for integrity.
Probably this is an option for you?
Kind regards
Andreas
Am 02.01.2017 um 12:29 schrieb Jan Stransky
<jan.stransky.c...@gmail.com <mailto:jan.stransky.c...@gmail.com>>:
Hi,
does backuppc do some data integrity checks on stored files or files
to-be-stored? Something like regular md5sum checks.
Jan
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