Have a look here https://github.com/backuppc/backuppc/issues/369
I think this might be the same problem - not actually a problem with
BackupPC but with rsync.
David While BSc(Hons) MBSC CEng CITP
On 26/11/2020 10:19, Paul Leyland wrote:
Another problem has cropped up with the newly installed 20.04LTS release.
The Ubuntu system backs up several other machines as well as itself,
one of which runs Ubuntu 20.10, two Gentoo boxes and a Windows 10
machine. The Linux boxes all use rsync whereas the Windows box exports
its disk to the backup machine which mounts it with Samba. Backups of
the server and of its Windows client work fine.
So far the other Ubuntu system and one Gentoo box go into a strange
failure mode. It is possble that the other may do so too but it hasn't
had chance to do so yet.
The failure goes as follows. First a backup, whether incremental or
full doesn't matter, is started. I monitor its progress with lsof on
each system to see what is being read and written. I also use "ls
-larts" in active subdirectories of /var/lib/backuppc/pc/PCNAME/new to
monitor what is being written and read. All goes well for a long time
then activity apparently ceases, but only apparently.
What is really happening is that the newly formed XferLOG.z grows
enormously. Until it was killed just now, that file had reached
4180700817 bytes (3.9GiB) after 6 hours and then stopped growing. A
typical log file might be 20MiB. Examination with BackupPC_zcat on
the giant file shows the regular log lines for a long time but
eventually turns into binary mush.
The NewFileList file is also strange. It ends part way through a
standard line as follows:
486f208a006a335645ec1839b9c001ac 189
f%2f/flib/ffirmware/fcxgb4/fconfigs/attrib
bc6f59e44fdcdac6a4034b43f588bafe 449 f%2f/flib/ffirmware/fcxgb4/attrib
3f250cfd4201077c6e341454dd042d3c 766 f%2f/flib/ffi
and is 24756 (i.e. 6 * 4096) bytes long.
Anyone else seen similar behaviour and / or have an idea as to what
may be going wrong?
Thanks,
Paul
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