I have long been able to back up my (rooted) Android phones using
ssh/rsync.
I also have not problem backing up my Windows and Linux machines.
However, BackupPC timesout when I try to back up an old Samsung S3 (which
used to back up perfectly before). The timeout occurs no matter what
value I use even though the total backup size is only about 5.2 GB.
The corresponding rsync_bpc client command is:
/usr/bin/rsync_bpc --bpc-top-dir /var/lib/backuppc --bpc-host-name
droidtestmachine --bpc-share-name /data --bpc-bkup-num 0 --bpc-bkup-comp 3
--bpc-bkup-prevnum -1 --bpc-bkup-prevcomp -1 --bpc-bkup-inode0 6621
--bpc-log-level 1 --bpc-attrib-new -e /usr/bin/ssh -p 22 -l u0_a500
--rsync-path=PATH=su\ -lpc\ /data/mybin/rsync --super --recursive
--protect-args --numeric-ids --perms --owner --group -D --times --links
--hard-links --delete --delete-excluded --one-file-system --partial
--log-format=log: %o %i %B %8U,%8G %9l %f%L --stats --checksum --timeout=72000
--exclude=media/0/Download/Temp/* droidy:/data/ /
And the corresponding rsync (remote) server command on the android host is:
20298 10500 0:00 su -lpc /data/mybin/rsync --server --sender
-slHogDtprcxe.iLsfxC
20373 0 0:52 /data/jjk/bin/rsync --server --sender
-slHogDtprcxe.iLsfxC
Interestingly, I can successfully manually run the same rsync
command directly by invoking rsync with the above parameters and the
rsync completes successfully in just a couple of hours (far less than the
timeout).
The corresponding rsync client command is:
sudo rsync -e /usr/bin/ssh\ -p\ 22\ -l\ u0_a500 --rsync-path=su\ -lpc\
/data/mybin/rsync --super --recursive --protect-args --numeric-ids --perms
--owner --group -D --times --links --hard-links --delete --delete-excluded
--one-file-system --partial --log-format=log:\ %o\ %i\ %B\ %8U,%8G\ %9l\ %f%L
--stats --checksum --timeout=72000 --exclude=media/0/Download/Temp/\*
droidy:/data/ /tmp/droid-backup
And the corresponding rsync server command on the (remote) android
host is exactly as above.
Since 'manual' rsync works, the problem is presumably *NOT*
- The android phone
- The setup of ssh and rsync on the phone
- The files on the phone
- The connection between the phone and the Linux machine invoking
rsync or rsync_bpc
Also, since my BackupPC server otherwise works fine, there is
presumably nothing fundamentally wrong with my BackupPC installation.
Finally, since at least some files are transferred (according to the
BackupPC logs) before the timeout, there is no problem with the ssh
keys for the android connection.
So, why would rsync_bpc timeout but not when I run straight rsync?
i.e., what is rsync_bpc doing differently that would cause a hang?
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