20 GB Container taking 10 mins. to backup, snapshot mode

[moxfan]

Every backup of a 20 GB container (a thin-pool LV) on a PBS server in snapshot mode takes the same time, approx. 10 mins, regardless of whether it's the initial backup or the subsequent backups. OK I get that the 2nd, 3rd backups are incremental in disk-space used and that's certainly a good thing. But there seems to be no incremental gain time-wise on backups after the initial one.

Not sure if things are supposed to be that way or if there is something I am missing here.

 

[dcsapak]

as explained in the docs here: https://pbs.proxmox.com/docs/technical-overview.html#file-based-backup
file-based backups with the proxmox-backup-client (that also counts containers) will currently need to read all data from disk again on each backup. but you're right, the chunks generated will still be deduplicated and sent incrementally to the server