Hello,
First of all, I would like to thank BackupPC's developers for their
software. I use it to backup a few personal Linux and Windows machines
at home and it has worked flawlessly for years. It is easy to use,
robust and well documented. Thanks a lot!
But today I am facing a strange issue that I have issues to debug. :-(
* Context:
* BackupPC software installed on a fresh Debian 10 machine, using
standard debian package (Version: 3.3.2-2+deb10u1) with HDD
* Machine "louise" to backup giving me headaches: Fedora 31 Linux
machine, with SSD drive
o about 39Gb to backup
o "louise" machine is backupped using ssh+rsync
o I have backupped it for years without any issue up to now.
Regular "I changed nothing!" argument (but something should have
changed, of course)
* The Issue: After a backup of "louise" machine starts (either
automatically by BackupPC server or manually), the file transfer never
succeeds, i.e. I am never reaching the point where there are two PIDs in
BackupPC status page. And of course the backups never finishing, even
after waiting 12h!
* More information:
Doing backup of a remote Linux machine with same BackupPC server works
(for about 8Gb of data, 1h behind a 100Mbit connexion), so BackupPC
server seems to work.
I have no problem to connect from BackupPC to root account on "louise"
machine. No such errors in the log files of BackupPC.
Locally on "louise" machine, I am able to rsync the relevant directory I
want to backup to another local disk (from SSD disk to another HDD disk)
in about 6 minutes. Total transferred file size: 41,280,889,122 bytes.
File list generation time: 0.001 seconds. So it seems SSD disk is
working correctly and file list generation time is negligible.
As recommended in the FAQ, I launched a full dump manually with -v
verbose option:
"""
$ /usr/share/backuppc/bin/BackupPC_dump -v -f louise
cmdSystemOrEval: about to system /bin/ping -c 1 louise
cmdSystemOrEval: finished: got output PING louise (192.168.0.5) 56(84)
bytes of data.
64 bytes from louise (192.168.0.5): icmp_seq=1 ttl=64 time=0.160 ms
--- louise ping statistics ---
1 packets transmitted, 1 received, 0% packet loss, time 0ms
rtt min/avg/max/mdev = 0.160/0.160/0.160/0.000 ms
cmdSystemOrEval: about to system /bin/ping -c 1 louise
cmdSystemOrEval: finished: got output PING louise (192.168.0.5) 56(84)
bytes of data.
64 bytes from louise (192.168.0.5): icmp_seq=1 ttl=64 time=0.150 ms
--- louise ping statistics ---
1 packets transmitted, 1 received, 0% packet loss, time 0ms
rtt min/avg/max/mdev = 0.150/0.150/0.150/0.000 ms
CheckHostAlive: returning 0.150
full backup started for directory /
started full dump, share=/
Running: nice -n 19 /usr/bin/ssh -q -x -l root louise nice -n 0
/usr/bin/rsync --server --sender --numeric-ids --perms --owner --group
-D --links --hard-links --times --block-size=2048 --recursive
--ignore-times . /
Xfer PIDs are now 9330
xferPids 9330
Got remote protocol 31
Negotiated protocol version 28
Sent include: /home
Sent exclude: /*
Sent exclude: /home/david/.cache
Sent exclude: /home/david/00-poubelle
Sent exclude: /home/lost+found
Sent exclude: /home/david/.opam
[No answer after 12 hours, so I enter ^C ]
fileListReceive() failed
Done: 0 files, 0 bytes
Got fatal error during xfer (fileListReceive failed)
Backup aborted by user signal
Not saving this as a partial backup since it has fewer files than the
prior one (got 0 and 0 files versus 0)
dump failed: fileListReceive failed
"""
Here is the content of louise.pl configuration file:
"""
#
# ssh+rsync
#
$Conf{XferMethod} = 'rsync';
$Conf{BackupFilesOnly} = ['/home'];
$Conf{BackupFilesExclude} = [ '/home/david/.cache',
'/home/david/00-poubelle', '/home/lost+found', '/home/david/.opam' ];
$Conf{RsyncClientCmd} = 'nice -n 19 $sshPath -q -x -l root $host nice -n
19 $rsyncPath $argList+';
"""
I can also do following rsync command from 'backuppc' account on
BackupPC server:
$ /usr/bin/time rsync -azx --stats root@louise:/home/david
/var/lib/backuppc/manual
It saves the 39Gb of data in about 26 minutes. File list generation
time: 0.001 seconds. File list transfer time: 0.000 seconds
In my current understanding, disks on both louise and BackupPC server
machines are working, network is working and configuration aspects
should be OK.
I am stuck at this point.
Any idea how I could debug this issue?
Many thanks in advance for any help,
Best regards,
D. Mentré
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