Offsite backup with REALY bad ISP

[Micinka]

Hello, ppl.

I'm having a hard time backing up one of my customers running ProxmoxVE. His ISP is supplying about 15Mb/s speed, but its bad wireless connection so its fluctuating between 5-15Mb or eventualy dropping completely. I have BackupServer on-prem with newly installed ProxmoxBackupServer (my rented server, not customers...). I built a central PBS for all of my customers and set up sync between this 2 PBS instances.

BUT.... and now comes the problem. There are few VMs arround 32GB size, they managed to sync, BUT bigger VM about 192GB wont sync at all... connection always drops during backup / sync).

Is there a way to do the Sync in the way that IF connection is lost i can run task again and continue from the point Snapshot synced last ( lets say 30% )?

Because im gonna sync about 3TBs this way, and the Internet connection is REALY not able to do this in 1 run....

I thought already of moving the backup server on the same network, as my main PBS and doing the 1st sync and than get it back and do the the differential runs daily.

THX for any advice.

 

[fabian]

as long as you don't run a GC or prune on the sync target, a sync should pick off right where it left off (modulo re-downloading some smaller index files and starting over on the last chunk that was only partially download). so you can basically run a proxmox-backup-manager pull in a loop until it's synced up