Regarding my situation, here's the short version at this point: I've
metadata but no data. I've no idea how it happened, but something
obviously did, somewhere in here:
oldhost% zfs send | ssh backuphost zfs recv
backuphost% zfs send | ssh newhost zfs recv
newhost% zfs list -t snapshot | xargs zfs destroy
I was replacing old hardware with new hardware and none of these
commands are exact, but get the idea across.
I've no *conclusive* proof, but it seems to me that command #3 above is
where things went wrong. BackupPC is not to blame, which is great
because I love it and want to keep using it.
Lesson learned: don't destroy snapshots until you've validated your
data. Duh.
While these backups ARE valuable (to me alone), fortunately, most of the
data CAN be restored but it's going to take a lot more effort than I
would like. C'est la vie.
On 11/2/21 8:34 AM, backu...@kosowsky.org wrote:
Have you tried BackupPC_zcat on the above pool file?
BackupPC_zcat: can't find
/data/backuppc/cpool/72/ca/72ca0cc1bf7a179f8c3cdabc187e3887
What is in the refCnt directory (and subdirectory)?
What is in the f-mangled directories?
What is in the log files under:
- TopDir/log
- TopDir/pc/$host
Are there errors? And if so what are they?
I can provide all the above if you still would like, but it seems to me
that something has gone horribly wrong and is causing my backups to be
quickly eroded away. This is from the Web UI:
Nightly cleanup removed 188102 files of size 182.78GiB (around
2021-11-03 01:42),
As G.W. pointed out, there are some unattractive "steps" in week 44. I
concur, the pool appears to be shrinking due to some sort of
configuration corruption.
I think it's pretty clear that it's a lost cause at this point and I
will need to start over from scratch.
You may also want to try backuppcfs.pl which mounts your backups as a fuse
file system and allows you to browse files to see what if any files
are actually backed up.
Is this part of the standard distribution tarball? It doesn't seem to be
installed and I don't see it on GitHub.
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