After experiencing numerous failures due to unstable network connections, I discovered that btrbk is set to send a relatively large incremental backup instead of smaller incremental backups, making it challenging to complete the backup process under unstable network conditions.
Here is what btrbk currently do
(I used a port forward program because one machine doesn't have public ip address)
btrbk run -n
WARNING: Target subvolume "127.0.0.1[25566]:/mnt/Rescue1/HDDPool-Y.20240314T0030" exists, but is not a receive target of "/mnt/HDDPool-Y/btrbk_snapshots
/HDDPool-Y.20240314T0030"
WARNING: Please delete stray subvolumes: "btrbk clean 127.0.0.1[25566]:/mnt/Rescue1"
WARNING: Skipping backup of: /mnt/HDDPool-Y/btrbk_snapshots/HDDPool-Y.20240314T0030 --------------------------------------------------------------------------------
Backup Summary (btrbk command line client, version 0.32.6) Date: Sat Mar 16 13:09:36 2024
Config: /etc/btrbk/btrbk.conf Dryrun: YES
Legend: === up-to-date subvolume (source snapshot) +++ created subvolume (source snapshot) --- deleted subvolume
*** received subvolume (non-incremental)
>>> received subvolume (incremental)
--------------------------------------------------------------------------------
/mnt/HDDPool-Y
+++ /mnt/HDDPool-Y/btrbk_snapshots/HDDPool-Y.20240316T1309
--- /mnt/HDDPool-Y/btrbk_snapshots/HDDPool-Y.20240226T0032
--- /mnt/HDDPool-Y/btrbk_snapshots/HDDPool-Y.20240227T0032 --- /mnt/HDDPool-Y/btrbk_snapshots/HDDPool-Y.20240228T0128
--- /mnt/HDDPool-Y/btrbk_snapshots/HDDPool-Y.20240229T0430 --- /mnt/HDDPool-Y/btrbk_snapshots/HDDPool-Y.20240301T0430 --- /mnt/HDDPool-Y/btrbk_snapshots/HDDPool-Y.20240309T0436
--- /mnt/HDDPool-Y/btrbk_snapshots/HDDPool-Y.20240309T1230 --- /mnt/HDDPool-Y/btrbk_snapshots/HDDPool-Y.20240309T1652 --- /mnt/HDDPool-Y/btrbk_snapshots/HDDPool-Y.20240310T0433
--- /mnt/HDDPool-Y/btrbk_snapshots/HDDPool-Y.20240310T0506 --- /mnt/HDDPool-Y/btrbk_snapshots/HDDPool-Y.20240310T0830 --- /mnt/HDDPool-Y/btrbk_snapshots/HDDPool-Y.20240310T1230 --- /mnt/HDDPool-Y/btrbk_snapshots/HDDPool-Y.20240310T1630 --- /mnt/HDDPool-Y/btrbk_snapshots/HDDPool-Y.20240310T2030
--- /mnt/HDDPool-Y/btrbk_snapshots/HDDPool-Y.20240311T0430
--- /mnt/HDDPool-Y/btrbk_snapshots/HDDPool-Y.20240311T0830
--- /mnt/HDDPool-Y/btrbk_snapshots/HDDPool-Y.20240311T1230
--- /mnt/HDDPool-Y/btrbk_snapshots/HDDPool-Y.20240311T1630
--- /mnt/HDDPool-Y/btrbk_snapshots/HDDPool-Y.20240311T1729
--- /mnt/HDDPool-Y/btrbk_snapshots/HDDPool-Y.20240312T0905
--- /mnt/HDDPool-Y/btrbk_snapshots/HDDPool-Y.20240312T0915
--- /mnt/HDDPool-Y/btrbk_snapshots/HDDPool-Y.20240312T1912
--- /mnt/HDDPool-Y/btrbk_snapshots/HDDPool-Y.20240312T1915
!!! 127.0.0.1[25566]:/mnt/Rescue1/HDDPool-Y.20240314T0030
>>> 127.0.0.1[25566]:/mnt/Rescue1/HDDPool-Y.20240315T0103
>>> 127.0.0.1[25566]:/mnt/Rescue1/HDDPool-Y.20240315T0222
>>> 127.0.0.1[25566]:/mnt/Rescue1/HDDPool-Y.20240315T0426
>>> 127.0.0.1[25566]:/mnt/Rescue1/HDDPool-Y.20240315T0430
>>> 127.0.0.1[25566]:/mnt/Rescue1/HDDPool-Y.20240315T0434
>>> 127.0.0.1[25566]:/mnt/Rescue1/HDDPool-Y.20240315T0830
>>> 127.0.0.1[25566]:/mnt/Rescue1/HDDPool-Y.20240315T1943
>>> 127.0.0.1[25566]:/mnt/Rescue1/HDDPool-Y.20240316T0403
>>> 127.0.0.1[25566]:/mnt/Rescue1/HDDPool-Y.20240316T0430
>>> 127.0.0.1[25566]:/mnt/Rescue1/HDDPool-Y.20240316T1257
>>> 127.0.0.1[25566]:/mnt/Rescue1/HDDPool-Y.20240316T1309
--- 127.0.0.1[25566]:/mnt/Rescue1/HDDPool-Y.20240220T0032
--- 127.0.0.1[25566]:/mnt/Rescue1/HDDPool-Y.20240221T0032
--- 127.0.0.1[25566]:/mnt/Rescue1/HDDPool-Y.20240222T0032
--- 127.0.0.1[25566]:/mnt/Rescue1/HDDPool-Y.20240223T0032
--- 127.0.0.1[25566]:/mnt/Rescue1/HDDPool-Y.20240224T0032
--- 127.0.0.1[25566]:/mnt/Rescue1/HDDPool-Y.20240309T0436
--- 127.0.0.1[25566]:/mnt/Rescue1/HDDPool-Y.20240309T1230
--- 127.0.0.1[25566]:/mnt/Rescue1/HDDPool-Y.20240309T1652
--- 127.0.0.1[25566]:/mnt/Rescue1/HDDPool-Y.20240310T0433
--- 127.0.0.1[25566]:/mnt/Rescue1/HDDPool-Y.20240310T0506
--- 127.0.0.1[25566]:/mnt/Rescue1/HDDPool-Y.20240310T0830
--- 127.0.0.1[25566]:/mnt/Rescue1/HDDPool-Y.20240310T1230
--- 127.0.0.1[25566]:/mnt/Rescue1/HDDPool-Y.20240310T1630
--- 127.0.0.1[25566]:/mnt/Rescue1/HDDPool-Y.20240310T2030
--- 127.0.0.1[25566]:/mnt/Rescue1/HDDPool-Y.20240311T0430
--- 127.0.0.1[25566]:/mnt/Rescue1/HDDPool-Y.20240311T0830
--- 127.0.0.1[25566]:/mnt/Rescue1/HDDPool-Y.20240311T1230
--- 127.0.0.1[25566]:/mnt/Rescue1/HDDPool-Y.20240311T1630
--- 127.0.0.1[25566]:/mnt/Rescue1/HDDPool-Y.20240311T1729
--- 127.0.0.1[25566]:/mnt/Rescue1/HDDPool-Y.20240312T0905
NOTE: Some errors occurred, which may result in missing backups!
Please check warning and error messages above.
Please delete stray subvolumes: "btrbk clean 127.0.0.1[25566]:/mnt/Rescue1"
NOTE: Dryrun was active, none of the operations above were actually executed!
For a better experience on low quality network, a strategy is to send 20240312 snapshots first
After experiencing numerous failures due to unstable network connections, I discovered that btrbk is set to send a relatively large incremental backup instead of smaller incremental backups, making it challenging to complete the backup process under unstable network conditions. Here is what btrbk currently do (I used a port forward program because one machine doesn't have public ip address)
For a better experience on low quality network, a strategy is to send 20240312 snapshots first